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Dodge Ram Transmission Problems

is there any way to to increase the line presure on a 5.2 ram 1500? I have been told that this is the reason for most of dodge transmission problems. I am also getting a fluxuation in rpm at highway speeds. You can hear and see the variation in rpm. At 70mph with the cruise set it will bounce about 300rpm. So if the rpm is steady at 3000 it will bounce up to 3300. Its almost like a mini slip. I was told it could be my lock up converter going bad. Any info would be great.
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Comments

  • I have a 2001 Dodge Ram with a 5.9. I noticed mine doing the same thing that yours is doing. I was driving it and was going about 70 and the cruise kicked on and it felt like someone had hit the brakes. I could not get the cruise off and the truck would not go. I had it towed to a shop and they told me that a ball in the transmission that keeps fluid from draining back had got stuck and burned the tranny up. I had it rebuilt and now it doesnt shift right. When I use the cruise the rpms will bounce like you talked about. I dont know what else can be done except have it looked at. I wish I had the answer for you.
  • I was told it is the lock up converter. I also know there is a way to increase line pressure to help keep the clutches and steels applies to help stop slippage. The funny thing is my tranny went out at 9,500 miles. I got the truck brand new and have always checked my fluid and changed it regularly. When the tranny blew I was over 100 miles from home, call the dodge help line and they said they would tow it to the nearest dealer. I told them I wanted it taken back to my home town where I wouldnt have to travel to get the truck back. They told me no and I ended up paying a 120+ towing bill. I am so over dodge. Never again will I buy a dodge vehicle. Next will be a ford turbo diesel. Oh yeah, when my local dealer pulled my tranny pan off they told me there was about 1/2 inch of black crap in the bottom of the pan and it wasnt clutch material. They replaced it no ?'s asked and and the lines and radiator. Since the tranny cooler is in the radiator and they didnt want anymore problems they just replaced it all. Maybe when I get up I will put up a post about how much a P.O.S. this truck really is. If I knew how lemon law works I would definatly try to get a replacement.
  • Can anyone please help !!! I purcased a 98 ram 3500 diesel and the trans. started to slip in and out of overdrive the dealer fixed it by replacing the throttle pos. sensor; but now the trans. is slipping in 1st. 2nd. 3rd. however, 4th gear overdrive seems to grab fine. Inaddition, every once in awhile it will just pop right out of gear and slip then go back into gear. The dealer claims the slipping is not happening and it didnt pop out of gear when they drove it. any pointers any one thanks, carnut
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    When my 96 3500 Cummins would start slipping, that was my sign to check the stick and top off. I had my trans serviced every year, with filter, pan gasket, band adjustment, and fluid change.

    Two things to check:
    - fluid level, and make sure you are using the proper fluid (ATF+3 or 4)
    - if the trans hasn't been service, have a complete service done as described above (not just a fluid change)

    If those two don't cure the slip, you likely have a torque converter issue.

    kcram - Pickups Host
  • Thanks so much kcram, for the advice. I will have the trans tune up done. If that doesn't ill try and scrape up the funds for a BD transmission. carnut
  • HAVING PROBLEM WITH TRANSMISSION SHIFTING IN AND OUT OF OVERDRIVE OR TORGUE CONVERTER DISCONNECTING. MOSTLY BETWEEN 50 AND 70 MPH. SOMETIMES RUNS 100 MILES WITHOUT A SHIFT, OTHER TIMES HAPPENS CONSTANTLY. ANYONE HAD THIS PROBLEM?
  • james59, We have had the same problem with a new transmission installed in our 1996 Dodge 3500 4x4. We have taken the truck to the dealership here twice and they seemed to have found the problem but did not fix it correctly. It started shifting in and out again but, not as much. What really bothers us is that it has a FULL WARRANTY and they would not stand behind it! It cost us $135.00 to have them hook the truck up to there diognosics machine. So... dose anyone know what to do about them not honoring the agreement??? Drivelarge
  • dustykdustyk Posts: 2,926
    I don't know how I missed this one, but line pressure IS NOT an issue with Dodge transmissions. In fact, almost all automatics produce more line pressure than is necessary 95% of the time.

    Slipping can be caused by a number of things, but the designed line pressure is not one of them.

    Your 300 RPM change is more than likely indicating the torque converter coming out of lock-up. This, too, can be caused by a variety of things, including a bad throttle position sensor or dirty shift solenoids.

    Regards,
    Dusty
  • hansiennahansienna Posts: 2,312
    How frequently do you recommend changing the transmission fluid and filter in 2001-2006 DC minivans with 3.3L V6 and Chrysler PT Cruisers with base 2.4L inline 4 cylinder (without Turbo).?
  • When going up hill in 3rd with overdrive locked out, the transmission momentarily downshifts to 2nd and back to 3rd. This can occur once or several times in a row. Any suggestions???
    Gary
  • KCRamKCRam Mt. Arlington NJPosts: 3,516
    Depends on your speed at the time. If your speed is at a computer-determined shift point under the conditions, it will hunt back and forth like that. Speed up or slow down a few mph, and that should keep you in a single gear.

    kcram - Pickups Host
  • Thanks for the quick reply. I'll try your suggestion and see if that cures the problem. :D
  • Hope someone can help with this one. I have an 01 1500 series with overdrive and transmission always appears to want to take off in third gear. The code comes up on the scanner as a P-1762 govenor pressure sensor.
  • I am having the same problem. The transmission governor pressure solenoid and governor pressure sensor are on the bottom of the valve body just inside the transmission pan. I plan on replacing both of these because you can't be sure which one is bad and I don't want to have to do the job twice. It is a simple job; drop the tranny pan, replace components, replace pan, refill fluid. This link may help you: link title It deals with a diesel but it's all the same.
  • I have a 95 ram 3500 2wd diesel, the trans is slipping in and out of gear only when parked for about an hour or more on level ground especially when cold, but it disappears after a mile or two. HOWEVER; if i park in my driveway which is at a slight incline it never slips,even when it's cold. Anyway i'm stuck to trying to find an incline everytime i have to leave the truck for more than an hour. My truck has 130,000 miles, please help, do i need a new trans. thanks carnut17
  • Thanks pegleg I took it to a transmission shop that offered a free check (the best kind) and he told me what I already knew except he has had a few problems with wiring being damaged from the computer to the transmission. I am going to take it to him next Friday and he is going to check it for me. I will let you know what happens.
  • I have a '96 ram 3500 pickup with a Cummins diesel and 4 speed auto trans. My problem is that the trans suddenly won't shift into overdrive. One day it shifted fine the next day it wouldn't shift into 4th gear. The fluid is full and has about 5000 miles since the last fluid and filter change. I checked all fuses and relays they seem fine. I also checked electrical connections to the trans, all are still connected and corrosion free. Any ideas on what the problem might be? Thanks for your help. Tom
  • I'm getting a code P1756 (Transmission control pressure not equal to target) any thoughts as to what that could be?
  • dustykdustyk Posts: 2,926
    You indicate that the transmission fluid was changed 5000 miles ago. What type of transmission fluid was installed? How many miles on this transmission?

    Regards,
    Dusty
  • Hello ddually, I had the exact same trans. problem on my 95 ram 3500 diesel. It turned out to be the throttle position sensor. I am almost 90% sure this is the problem. I think the 10% might be the wrong trans. fluid but i doubt it. Let me know the outcome.
  • I have a 2006 Ram 1500 Quad cab with the 5.7 multi displacement Hemi. On cold and cool mornings or evenings when I start it and place it in gear the transmission will sit there from anywhere of 3 to 6 seconds before it to engages. It's still under warranty and the dealer tells me this is normal. Has anyone else heard of this?
  • my 94 4x4 1500 318 auto did some Very weird stuff* tonite.
    i went and replaced the egr valve at advance..when i went to leave,the truck literally wouldnt go into ANY gear..i tried revving,etc,no dice..when i shut the truck Off tho,and restarted,it went into 1st....i tried to drive it home,but it was refusing to go from 1st to any other gear....i finally figured out that if i shut the truck off,then restarted it and put it in gear,it would pull off to about 21mph...at which point it would flash and no gears....i made it to about 2 miles away,and this time when i did the restart,the truck pulled off Strong and All 3 gears..PERFECT..so,like,wtf?...then,i get home and revved it,its fine..took it out of gear,put it back in,and im back where i started,no gears..just exactly what in the hell is wrong with this thing?
    any help would be appreciated.
    Edit:btw,the guy at advance did a scan,Before this happened,With the truck running..
    i asked him if it should be off first and he said no?
    the truck Never did this until he did that scan,im wondering if he messed it up somehow,by testing it running?
    the codes came up as code 31 and some weird code hex4??
    again,thanx in advance for any help..Brokedown in New York.
  • yes,because the trans gets no fluid until you either put it in gear or Neutral..the front pump doesnt activate in Park.best thing to do is to put it in neutral Before you put it in any gear..let it flow some fluid Then put it in gear....there is a way to redo the trans with a special valve to cure this/no fluid pumping in park/,but it is a rather expensive fix.G/L,rob
  • Code 31 is a problem with the canister purge solenoid circut. I can't help with hex4 as my list only goes from 11 to 72 on OBD-1 equipped trucks.
    To get the codes manually cycle the key in the following order: on-off-on-off-on but do not start the engine. Watch the check engine light, it will flash. A short pause between flashes will indicate the 2nd digit and a long pause will indicate the beginninng of a new code. When the cycle is complete you will get code #55
    Check with your local dealer to see if the engine should be running or off when using a diagnostic code reader.
  • jnealjneal Posts: 247
    Whether or not the engine should be running depends on what test you are running and if your scanner is capable of reading those tests. Example: Engine Misfire....how ya gonna check that without the engine running?
    Even the older OBD1 systems had some capability to make tests with the engine running.
  • This past week the transmission on my 02 ram (5.9 4X4)started slipping. Now it only shifts from first into third after 50 MPH and then makes what seem like mini shifts. Still feels like it slips at low speeds. It was 3/4 qt low on fluid and I see some rodent bites in some wires but can't find any cut lines or vacume lines. What is going on??? Engin lite is on so I am going to the dodge dealer asap. Any ideas outthere?
  • Yes I spoke to the service manager and he showed me a service bulletin that states that it can take up to 3-6 seconds after the vehicle has sat for 8 hours or more. I guess the fluid drains from the torque converter. He didn't say if this was a defect in the transmission or if a fix was coming. Just said that once it was placed in any gear other than park the pump would kick in and once the pressure was up 3-6 seconds there shouldn't be any problem. Any way thanks for the response. PS what is the fix
  • i`ve learned a lot in the past 3 days,but my trucks still down.now has no codes,yet it doing the same thing..start it,put it in gear it works fine,change to park then back and no gears..gotta be something stupid..one guy says limphome mode.?im just praying for a good answer.

    as far as a good value for fixing trannies that Are`nt Broken YET,heres a kit.
    if you really want some performance,check out this page,its full of options for our trucks.
    http://www.transmissioncenter.net/dodge.htm
    sluggo33,the part you need is listed on that page,its a tube that allows the convertor to be fed in park..gl.

    #SC-46/47RHE. The Sure Cure Transmission Reconditioning Kit, Parts in one box to cure common root-cause problems. Sonnax is pleased to announce our 46 / 47RH / RE (518 / 618) application-specific kit to provide rebuilders with a full complement of parts in one box to cure common root-cause problems. Sonnax Sure Cure™ kits will simplify decisions for transmission rebuilders by providing the best Sonnax fixes in one box with detailed, step-by-step instructions, and all orderable by one part number. Cost $148.00

    good luck,and if anyone knows whats up with my truck,please reply.
    so far ive heard the computer needs to be reprogrammed,reflashed,bad convertor,bad wiring,bad sensors,etc etc..the baffling fact is that it Will work fine,Once..but take it out of gear and its gone....

    o,the best part,i bought another 94,360-2wd 1500 longbed so i would have something to drive ,guess what happened on the way home?
    yep,trans acted weird..SIGH!!!!!
  • [quote=rollerdoo]I am also getting a fluxuation in rpm at highway speeds. You can hear and see the variation in rpm. At 70mph with the cruise set it will bounce about 300rpm. So if the rpm is steady at 3000 it will bounce up to 3300. Its almost like a mini slip. I was told it could be my lock up converter going bad. Any info would be great.[/quote]

    I am having the exact same problem. According to a response on this forum, it sounds like some of the likely solutions are replacing the tps, or shift solenoids. Are there any other likely problems that I should look into concerning this problem?

    It also sounds like wiring problems are not uncommon on these systems. I live in Arizona, and I have had more automotive wiring problems (I have 9 cars) since I moved here than I ever did in Oregon. It's phobably not a bad idea to go around the tps connections, transmission wiring connections etc. with a tube of dielectric grease. This has solved many of my wiring problems in the past.

    Since this seems to be a common problem with these trucks, why do I not see any receall or service bulletins? Maybe Chrysler would not be the fourth best selling auto manufacturer (Toyota is kicking their butt these days) if they treated their customers a little better.
  • skkatskkat Posts: 1
    The transmission in my father's 1996 Dodge 1500 pick-up recently went out. He took it in to have it re-built. The person working on says they have rebuilt the transmission but it still won't shift into first gear. The have told him it is due to the computer and the pcm needs to be replaced to fix the problem. Does this sound legitimate?
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