Isuzu Trooper TOD and 4WD Problems

boottmills

I was wondering if anyone else is having issues with their Torque on Demand systems going into 4WD. The 4WD does not engage at all and the TOD display on my dash blinks at me for about 60 seconds and then the red "CHECK" light starts flashing at me. I know nothing about the TOD system and the 4WD does not engage into 4LOW when I do it manually either...any ideas?

atfdmike

No such animal.....LOL
Are you referring to the actuator inside the T case, or one of the sensors on the outside of the T case, etc.
Any way, best new parts source I know of is Jerry at jlemond@bellsouth.net. A dealer with free shipping and good prices online is St. Charles Isuzu. Ask for Merlin there, although any parts guy will help you. They ship from the distributor and it is fast. I have used both. I think you will have a tough time finding new at better prices, and used are tough unless you live near a parts yard, etc.
Good luck.

dweave3

I am a new trooper owner with a 2001 that I can not get the TOD to engage. The auto light continues to flash but the front wheels never engage. Can you put manual hubs in this?

paisan

It is likely your front actuator for the 4wd. I had this problem happen on 2 troopers, one time it was locked in AWD/4wd mode after not engaging/disengaging for 2 months, the other time it wouldn't engage due to not being engaged for 2 or 3 months.

-mike
Motorsports and Modifications Host

boottmills

It looks like this seems to be an issue with mine as well...how much did this cost to fix? My wife is hounding me to get it done because of all the snow we have been getting this winter. :P

costello1

Just had my 02 Trooper in and the TOD light was blinking. $1342 to replace speed sensor A and B plus a new solenoid . Not many Izusu people left in my area so I don't have many choices .I want someone who knows what they are doing!!! I will have 100k on it in a few weeks. This is my third Trooper , I had a 86 and 88 . Is this the going rate , I use the unit for surf fishing and driving on to the beach .I also have to replace the rear brakes and rotors for 379.00 and Rt frnt axle and axle seal for 469.00. There goes my tax rebate !!!! Thanks GW !!!

wesbellmore

Mike (paisan)

2001 Trooper, bought new, 60,000 miles. Always maintained.

Where exactly is the actuator for the 4wd? My 2001 Trooper will not go into 4wd, but I can hear the mechanism "trying" to engage when I push the dash button. (Light flashes, does not go on full-time.)

At city speed, if I press the dash 4WD button I can hear a slight "cli-click" from front axle area. SOMETHING seems to engage slightly, because I can hear a very slight whine and the engine feels like its under a tiny bit extra load, but the 4WD light on the dash never goes on full, it just blinks. Then, when I hit the dash switch again to "disengage" , I hear a slightly different sounding "click clunk" and the dash 4WD indicator stops flashing and goes out.

Is this a vacuum actuator issue, or could it be the little "fork" just inside the end of the axle that engages the front axle is not sliding properly?

If you can point me to any good repair instructions, that would be great!

Wes

tdoster

Actuator is on the front axle. This is NOT your problem. Problem is more than likely the speed sensors on the transfer case. These send signals back to the computer to indicate slipage in either the front or the rear to engage or disengage the clutch in the front. These things are a pain in the rear, and very expensive. They are no different from speed sensors on many cars, and cost more than the sensors on my last Porsche. If you have a dealer fix, they will usually only replace them both at a cost between 1,100 to 1,500 and going up every day since it is so hard to get at them. Meaning one could and probably is good. Bad way to spend $350 for a part in my opinion. They also have to reset the codes, which you have to have the special software to do as well, so this is not a weekend mechanics job, and easy to mess things up. BUT, there are so many things that can go wrong, it is impossible to diagnose yourself, and even the dealers that are left are taking the code and replacing all sensors instead of the one that is out. All of the good Isuzu mechanics are working for other dealers now which have more cars coming through.

When you press 4 wheel on the dash, a solinoid is sent a signal that changes the vac preasure at the front axle, which locks the front wheels to the shaft. It then puts the computer in motion to look at signals from the various sensors to apply the clutch in the transfer case to add power to the front wheels when they begin to spin. It uses a speed sensor at the output shaft of each side to indicate what is happening. If one of those sensors goes out, then the computer can't calculate when to engage the clutch and will begin by the TOD not starting at all. It is possible that the computer got confused and needs to be rebooted by clearing the code, or removing the battery cable for 30 min. If the system does not work still, it will eventually go into check mode and they system will stop functioning all together. This is also the case when some people have it get stuck in locked mode, then turn it off. Signals are wrong to the computer, so it quits. Same with the clutch. But most of the time, it seems that the speed sensors on the output shafts are the failure point, which is hard to believe somthing so solid state would go out. Bad design, just as the piston rings, but that is another story.

I wanted 4 wheel, but TOD was just cutsy to engage when there is a little snow or ice on the ground and you want the front wheels to kick only when the back start to spin. So, you decide if you want to pay over a grand for cutsy or just bypass the computer and engage it when you want 4 high. Just have to be careful on dry roads with it.

Google an article on planetisuzu for converting to lock 4 wheel. When my sensors went out, I bypassed the system to lock the clutch in when I put it in 4 wheel drive. Loved the TOD, but for a weekend and $20 in parts, I am happy to have 4 high with it locked in as opposed to $1300 and it could go again by bad design.

hiprollc

Regarding the comment above, "They also have to reset the codes, which you have to have the special software to do. " As an FYI, you do not need special sofware to reset the TOD ECU DTCs (Diagnostic Trouble Codes). To reset the codes, all you have to do is ground the #8 pin on the diagnostic link connector, located just to the left and slightly below the steering wheel (on my 2000 Trooper) under the pop-open cover, and then follow a few simple reset steps. First, take about a 1 foot length of small gauge twisted wire, form a small point and insert in the #8 pin and hold or connect the other end to a ground point, which includes the metal back plate and/or bolt/nut under the diagnostic link cover. The #8 pin is the lower left pin. For orientation, the lower right is #1, lower left is #8, top right is #9, and top left is #16. This appears upside down in many manuals, so how can you check to ensure you have the #8 pin? Simple... with the pin grounded, turn the ignition swithc to ON (don't have to crank). The flashing check light will now appear as the DTC indicator, which begins by flashing the normal operation (DTC 12). If you are shorting the #8 pin, you will see one flash of the "check" light, followed by two successive flashes (1 and 2 equals code 12). It will do this 3 times. If you want to see what other codes are in memory, continue to keep the #8 pin grounded. After the 3 "normal" DTC codes, it will then display the next DTC code. If you see one flash, followed by 3 successive flashes (Code 13), it indicates a circuit is shorted to ground. A summary of all 2000-2002 Trooper codes is shown below:
12 - Normal Operation
13 - Reference Circuit Shorted To Ground
14 - Front Speed Sensor Open Or Shorted
15 - Reference Circuit Shorted To Power
16 - Front Speed Sensor Has No Running Speed Puls
21 - TP Sensor Has Faulty Voltage, Shorted Or Open
23 - ECU Failure
24 - Rear Speed Sensor Open Or Shorted
26 - Electromagnetic Coil Shorted To Ground
27 - Front Or Rear Speed Sensor Has No Pulse
28 - Axle Disconnect Output & Axle Switch Output Abnormal
31 - Electromagnetic Coil Disconnected Or Shorted
32 - Axle Disconnect Output Shorted Or Disconnected
33 - Axle Disconnect Output Circuit Shorted To Ground
36, 37, 38 - ECU Failure
So, now that you have read the code, let's get back to resetting the TOD ECU. Begin by turning the ignition back off, then shift the 4WD Transfer Lever (HI to LOW selector beside the auto tranny stick) to the neutral position. Ground terminal #8 again of the diagnostic link connector. Turn the ignition back ON and depress the brake pedal 5 times WITHIN 5 seconds. The TOD indicator will display the 4L indication (all front and rear indicators are illuminated) each time the brake pedal is pushed. If you don't see this happen, then you are not properly grounding the #8 pin connector or are not in the neutral position with the 4WD HI/LOW selector. When properly performed, this will reset the TOD ECU. A confirmation is provided by displaying only the normal check (DCT 12) indication. So, based on the codes above, this is not completely "impossible to diagnose yourself" as stated in the earlier post. In my opinion, the front and rear speed sensors probably should be changed at the same time since they are wired together inside the same terminal connector block (M-27) which is located on top of the transfer case and a real pain to get to. Note that if only one or both of your speed sensors are bad, you will always have 4WD LOW range, which bypasses the TOD ECU slippage/speed calcs, and transfers 50/50 torque between front and rear wheels.

When this happened to me (flashing check light), I verified all of the above, confirmed I had full time 4-wheel low (when transfer case in LOW speed), and verified I had minimal clutch output to the front axles (with TOD in 4WD AUTO). With the faulty speed sensor, I could not get full torque in HI, but a little extra pull was better than nothing at all.

By the way, disconnecting the battery for 30 minutes does nothing to reset the TOD ECU but will reset the actual engine computer (ECU or ECM in some references, plus loses all of your radio stations... LOL).

wesbellmore

This is my first visit back to the forum since posting...I forgot to turn on the email reminder to let me know there was mail.

THANK YOU for your detailed message! It makes me a bit peeved at Little Mr. Isuzu and his weak mechanisms... anyhow.

Do ALL Trooper 4x4 have Torque on Demand? I was reading about it in the manual, and although I have shift on the fly 4x4 (dash switch) I don't think mine is equipped with TOD. Would this eliminate the issue of speed sensors if I do NOT have TOD?

Wes

dweave3

my TOD still does not engage properly it will flash but if I leave it on after shutting off the car and parking it. I can then start the car in the morning and it will engage. ANY IDEAS?

hiprollc

I believe 98 and earlier were standard 4x4 (push button with full engage) with TOD becoming the standard in '99. There may have been a few in '99's without TOD. I have owned 98, 99, and 2000 but only my 98 was NOT TOD. If there is no TOD, I believe there is no need to have the speed sensors since the full amount of torque is being applied at all times but I am not 100% sure because my 98 never gave a moments trouble (was totaled in a rollover in 99 with less than 30,000 miles). The TOD indicator is visible on the left-side of the insrument cluster and displays a progressive indication of torque application, using 3 bars. At low torque transfer to the front wheels, only the first bar is illuminated; more torque transfer results in additional bars being illuminated. If you do not have these, you do not have TOD.

wesbellmore

Thanks 'hiprollc'... OK, good news for me... my '01 Trooper does NOT seem to have TOD by your description... I have NO progressive bars on the dash, just that little 4x4 icon that lights up when 4x4 is fully engaged or, in my case, mockingly flashes at me when I press the dash switch and says "ha ha, I'm not going into four wheel drive for YOU, buddy!"

At idle I can hear a 'ca-clunk' when I press the dash switch for 4x4...the icon blinks but it does NOT engage. If I engage the 4x4 switch in the morning after the vehicle has been sitting all night, the 4x4 MIGHT engage and operate normally. Now and then I can get it to engage when I press the 4x4 switch with the engine OFF and then starting it. When the front axle DOES decide to engage, it runs fine...no strange noises, no clunks, so I feel pretty sure it's ENGAGEMENT system is not working right...

ANY THOUGHTS???

brentb1

i have a 1999 trooper.can anyone tell me what pin connector to short so i can read my tod codes.after reading is there a way to clear the codes?thanks

brentb1

after reading all these forums i shorted the #8 connector on my 1999 trooper and got six codes.12,14,24,28,31,32.i them tried to clear them as stated here.every time i pushed the brake pedal the front indicators lighted as stated the rears never did.afterwards the check light blinked all 6 codes agian.what does this mean?thanks for any ideas.these forums are great.finally making slight progress

brentb1

one more question.with all these codes i have i can see where my 4 high(tod)might not work but why isnt my 4 low working anymore?it goes into 4 low but doesnt lock the front wheels.thanks agian.

hiprollc

Sorry about the slow and late responses, just don't spend much time on the computer anymore. Brentb1... with all those codes, my guess is that someone probably already has "diagnosed" problems with the 4WD system and probably disconnected some of the sensors in order to try to eliminate the codes, but probably just made it worse. Did you buy this vehicle new and these issues just start or did you buy it used and it was like this when you bought it? f the 4-low is not working, that means the vacuum solenoids are not engaging; could be electrical or vacuum related and is common for vehicles that are normally run on the highway and never "cycled" into 4WD. With all your codes, I wouldn't know where to begin. By the way, once you reset the codes and then restart the vehicle or even go back to the ON position, the sensors will immediately return all the codes unless you have corrected the problem. So, when you get an item fixed, you can reset the TOD ECU and that code should not reappear; if you don't fix it, the code immediately returns.

brentb1

not sure what all the codes mean that i have but i did find the front 2 vacuum soleniods to be bad.1 is stuck open and the other is stucked closed.si what i did for now was switched the vac.lines around so the one that has vacuum will lock my axle actuator and it worked.i have low and hi now.dealer here wants 200.00 for the soleniods(crazy).what and where is the electromagnetic coil?that is one of my codes and what does it do?thanks for everyones help.

chappe

I was just seaching for a place to post this same exact thing!!! I am so frustrated!!! We haven't had snow all winter, finally when we get it, I can't get back up the hill as I have no 4WE. That light on the TOD display flashes red . I read in the owners manual that we should not drive the car in this situation. I drive a 1998 model. Anybody else? Thanks!

claudiok

I had same issue and took to a trans shop. Started to talk to the guy and we became friends. He told me that the tod works with vaccum, and it unplugs, you can look at the front diff, there is a plate that cover a vacuum diaphrame and one of the hoses may be disconnected. That's what happened to my trooper.

claudiok

Can anyone tell me if their is a difference in the 3.5l regular and the 3.5l performnace. I'm having fuel economy problems and don't know where to begin. the other thing is seams to have a small cap fuel tank. every time i fill up it only goes up to 18 to 19 gallon

chappe

Thanks Claudiok! I will have the vacuum hose checked. I appreciate it! Hopefully it will not be an expensive repair.

Best of good fortune in 09!

sparky39

Maybe no big problem, but...99 trooper with new tranny and rear end, all works great but the rear wheel indicator light on TOD display does not light (front wheel indicator is fine). Could this be a bulb or something in the switch? Light actually stopped working before differential was changed and months after transmission was rebuilt. Any suggestion welcome.

Thanks,
sparky39

brentb1

if the check light is flashing(red)pull your codes yourself manually this will lead you in the correct direction.i have a 99 trooper tod and have been going through all this to.have learned a great deal on how and what to do so far.if the tod doesnt work(4wd high)shift into low and see if you have 4 low that will help isolate the issue also.let me know..

brentb1

i have a 99 trooper with a tod code 31(electromagnetic coil)has anyone had this and what was the fix.the only thing i know is to replace the t-case and hope its good.is there a way to check the coil?could it be wiring also?thanks......id hate to swap out t-cases and have the same issue but i need the 4wd high(tod)fixed asap.........

ectrooper

I have a similar problem. 2002 Trooper, 105k miles, just had trans rebuilt, now at 40mph or faster, when coasting (foot off gas pedal) the 4WD kicks in full 4WD (meaning all four wheel lights on dash are lit in full). It does not matter if TOD auto is on or off. Problem exists either way. I can hear and feel the 4WD kick in. If I just reapply the gas the 4WD disengages and goes back to original setting (TOD auto or 2WD). If I am breaking and the speed drops below 40mph then the 4WD disengages and goes back to original setting.

Could this be a vacuum problem? Others have said there is a breather on the transfer case, and that if the diff lock comes on while driving it could be the breather is blocked, causing some sort of pressure or vacuum inside the diff that activated the diff lock. The guy at the trans shop is puzzled, he thinks it is something electrical, perhaps a feedback sensor that passes through the trans that is telling the computer the rears are slipping and to go into full 4WD.

Any help is appreciated.

sparky39

Thanks for the help. I will try that tomorrow. The 4 wheel drive works fine it's just that the light no longer shows how much torque is going to the rear wheels. The light was okay till I had the wheel bearing on driver side replaced. The new tranny and differential seem to be fine, but the light bugs me! After spending so much I guess I just want everything to work. Glad to have help from someone with same trooper. Not many here in Connecticut. Thanks again...

brentb1

i have a 99 trooper and have tod code 28 which says axle disconnect output & axle switch output abnormal.can anyone tell me what this means,where its located and what i can do to fix it.thanks.

popz1947

Hi
When I push the Torque on Demand button on the dash of my 2000 Trouper instead of the display going to Auto and everything turning green, I get a red error where it usually would show Auto.

Does anyone have any thoughts as to what is no working correctly? and hopefully it won't cost a fortune to repair the problem.

Thanks for any of your help.

Popz

isu2

i have the same issue

rflemin

I've got a '98 Trooper with TOD. Several times lately, it has "paused" while on a bumpy alley -- it didn't completely die, but the POWER, etc. lights came on and it seemed to be driving at a lower gear, then back to normal. Once it died, but restarted once I shifted to Park. About an hour and a half ago, it did the 'pause', but kept running. Ten minutes later, it died, would not restart, and the TOD Check light came on and flashed. I put an OBD II tester on it, got a "Link" display, but nothing else. I coasted down to a parking spot and walked home to do a little research. I'm going back to see if I can find loose hoses or wires around the transfer case and to pull the battery cable. Anybody got any idea what could cause both the TOD Check light and Won't Start? And what I can do about it?
Oh yeah -- about three months ago, the transmission died (no second gear) and I had a used one put in. This happened out on the boonies and the transmission mech said he couldn't get rebuilds, so to go with the used one. It's been a little cranky about shifting into Park ever since. Maybe something wasn't installed as tight as it should have been? Thanks for any advice.

dirtroad565

Tod check light on my 2002 Trooper flashes codes 13, 14, and 24.

Bought a shop manual on CD.

Shorted pin 8 on C-63 to ground and generated aforementioned trouble codes. Presumably, the code 13 (reference short circuited to ground) is causing the other 2 speed sensor codes.

Per shop manual, pin 15 on the TOD Control Unit is connected to pin F-11 on the Powertrain Control Module through connectors B-49, H-12 and H-57 respectively. Disconnected wiring harness from TOD control unit and read direct short to ground on pin 15 of plug B-49. Went to pin F11 of connector E-54 on the Powertrain Control Module and read no continuity to pin 15/B-49 or short to ground. I did have continuity between F11/E-54 to pin 16 on what I believe to be connector H-57. The connector between H-57 and B-49 is H-12.

DOES ANYONE KNOW WHERE H-12 IS LOCATED? I have practically torn the car apart looking for this connector. The parts location page in the manual is of little or no help. I am ready to rig a jumper/bypass wire from pin 15/B-49 to pin 16/H-57 and hope for the best. All suggestion are welcome.

p.s. I have just replaced the second transmission in two years. I am presuming that someone pinched a wire during the process causing the TOD short circuit issue.

anyway

I have a 1996 isuzu trooper and for some reason my dashboard is making this clicking noise and the battery light brake light and other lights come on. Then when the clicking starts my sensors to show if i am over heating or if the battery voltage is low starts to go back and forth like crazy. Can someone please tell me what that is and how to fix it. I am just hoping that i am not on the freeway driving and my car stalls because of this problem. :sick:

armytrooper

I think my car is stuck in 4 wheel drive. I got in the car today and the Torque on demand rear wheels are lit up green, I have no idea how this happened or how to fix it.

rflemin

Whenever this happens to me, it's because I hit the AUTO button on the dash instead of the Hazard (4-way flashing lights) button that is right next to it.

anjinsan5

I just bought a 2002 Trooper with 95K miles on it. The TOD display is blinking all four wheels and the CHECK light below the display. I read a bunch of the posts here and figured it was the VSV like others have talked about. The Blue swich was broken so we replaced both of them. The problem is still the same.

the Auto switch does nothing. If you have the 4wd shifter in 4 wheel high truck drives fine. Can't get it to shift into 4 wheel low but if you put the shiter into Neutral (I assunme this is correct) the truck is literally in neutral no matter what gear the column shifter is set for. I am about to lose my mind with this thing... Can any one help me with this? Could it be the TOD ESM? The speed sensor I read about? Also the ABS light is lit, could that have any significance?

rflemin

Just to follow up: I replaced a relay and got the Trooper started, but it kept acting funny and finally died. I had it towed to a shop where they said that the battery had overflowed (don't think so, cause it was fairly new and I had just washed off some corrosion) and the fuse box was badly corroded. They cleaned and rewired the fuse box and replaced the battery and the Trooper has run fine ever since.

anjinsan5

I just bought a 2002 Trooper with 95K miles on it. The TOD display is blinking all four wheels and the CHECK light below the display. I read a bunch of the posts here and figured it was the VSV like others have talked about. The Blue swich was broken so we replaced both of them. The problem is still the same.

the Auto switch does nothing. If you have the 4wd shifter in 4 wheel high truck drives fine. Can't get it to shift into 4 wheel low but if you put the shiter into Neutral (I assunme this is correct) the truck is literally in neutral no matter what gear the column shifter is set for. I am about to lose my mind with this thing... Can any one help me with this? Could it be the TOD ESM? The speed sensor I read about? Also the ABS light is lit, could that have any significance?

bkasmauski

Hello,
I have a 1999 Acura Trooper, I mean Isuzu SLX, no Acura SLX yeah that's it Acura Slx that I am have problems with the TOD/AWD system. The first thing is when it is in 2wd the rear wheels on the TOD display blink instead of being permanently lit all the time. then after driving for a few minutes the red check light starts flashing. When you hit the TOD button the auto light and the front wheels light up on the display and the check light goes off. Then the second thing is when you engage the AWD and drive for a few minutes you feel a clunk and the AWD dis-engages and the light on the front wheels of the display go out and the auto light starts flashing and the check light goes on. If you stop the car the AWD will engage again for a few minutes then you feel that clunk again and it dis-engages again. Does anyone know what is going on here and can help me with this problem. WInter is almost here and I basically have a 2WD car now.

Thanks,
Bill

willmorton

I have a 1999 Trooper with 180k miles and the front wheels will not engage when the 4WD button is pushed. The shifter seems to do it's job, but nothing will get the front wheels turning. I would love to think it's a vacuum hose, but I really don't know and am looking for hints.

isu2

there was an article earlier about the small plastic gear on the front axle that engages the 4wd. apparently it gets all gummed up and needs cleaning.
there was an internet article on how to remove and clean and reassemble.

christien

Hello, I have a 2001 trooper and these same codes and am very curious if you have solved your problem. I am having trouble locating the connectors to do check flow 6. pin 15/b-67 to pin 3/h-49 based on the manual I have found.. what are the two harnesses directly connected to the TOD ECU? Any help is greatly appreciated!">

99trooppat

I am having the same issue with my 99 trooper. Same codes, 13,14, & 24. I tried clearing the codes, and they came right back. Were you able to solve this? Thanks!

anyway

Hi Christien yes I was able to fix the problem. We had to change the wire harnesses. They were caroded with power steering fluid that has started to melt away the wire over time. Mabey you should check your wire harness and see if they are ok because once I fixed those, there were no more blinking lights. And if that is the problem, I would not suggest finding them used, and they are very hard to find. I have a number to a dealer that sell them brand new Isuzu Auto Parts 888-509-8712. I wish you look and let me know if that was the problem. Because my car runs great now.

trooper17

Boottmill, I have the same problem with my 2001 Trooper. I had Dionostic test done by the dealer for 190.00 (what a rip off) they said it was the speed sensor on the drive shaft next to the universial. There is a front and rear sensor. They want to replace the sensor for 600 dollars a sensor. How did you solve your problem?

anyway

I changed the wire harness and that was the problem. my dash was lighting up like a christmas tree and they found that my wire harnesses were melted by the coolant. Also if you have not done the transmission oil on the car it will jerk on take off. You have to change the whole kit which i recently had done because it would jerk when I stepped on the gas so I would have to take off slow in order not to jerk. But when I changed the kit that solved the problem. I changed most of my sensors and those were not the problem. So try those 2 solutions first and see if that works for you.

lars20

On my 98 Acura SLX, the 4WD High will engage at speeds under 35mph and work fine, but at speeds above that level, there is a loud, grinding sound and difficulty steering until the 4WD button is punched off, at which time it goes back to 2WD. This problem is the same whether engaging initially at a higher speed or engaging initially at a lower speed and then gradually increasing to a higher speed. Once above 35mph, the 4WD will not work, and the truck feels/sounds unsafe to drive (until the TOD is disengaged). Any ideas?

Thanks much.

sphelps75

Can i continue to drive with this light blinking and also how do i manually check for codes.i have to drive 1700 miles in april someone please help.thanks.

sphelps75

When i put it into the neurtruel position (4wd) the truck does the same do i have to drive it in one or the other high or low?just purchased and have no clue.Any feed back is appreciated.My red check light also keeps flashing while driving is it safe to keep driving?

mac129

I did virtually nothing, but jiggled about 5 wires and twisted 2 plugs to make sure they were tight in their recepticles. These were under the rider's side of the 1999 Trooper, toward the end of the tranny. One plug/socket was just hanging in the air. Then started the engine, and the check light went out, and has not blinked since.

super77

my 99 trooper was doing the same thing today. it has the TOD as well and so i took it in and had a transmission kit done on it and it has seemed to do the trick. cost was $127.00 that was labor, tax, and parts.