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Comments
I'm guessing the 10 25 89 is the date of manufacture, October 25, 1989.
I've measured the gear ratio by turning the tire and the drive shaft and got 3.56, which is close-enough for me to 3.55, so I think the "- 3.55" means the gear ratio.
Maybe the 2852943 is the Chrysler part number. Can someone check this?
I took a string and used it to measure the circumference of the ring gear at its widest and got about 26 inches. If you divide 26 by 3.14 (pi), you get 8.28 inches for the gear diameter, which is closer to published numbers for Dodge's 8.25 inch gear than to Dodge's 7.25 inch gear.
But before this, I was told by a local used parts emporium desk jockey that the cover for the 8.25 inch differential is hexagonal while the 7.25 inch cover is rounded. My cover is rounded (actually elliptical), so he told me I had a 7.25 inch gear.
On the Internet I read that "Ring gear diameter can be identified by observing the housing tube diameter. The 7-1/4 inch axle has housing tubes which are 2.5 inch (63.5 mm) diameter at the inner ends and 3.00 inch (76.2 mm) at the outer ends; the 8-1/4 inch axle has housing tubes that are 3.0 inch (76.2 mm) in diameter."
My axle tubes are 3 inches O.D. for their whole length. Maybe this is another indication that I actually have a 8.25 inch differential.
Am I doing the ring gear measurement wrong? Should I be measuring around the widest part of the gear, or somewhere else? Am I wrong in thinking I have the 8.25 inch ring differential, or is the parts man wrong?
I'd sure be grateful for some help. I've never done any differential work, and this is the first time I've seen one opened-up.
Most 2WD have the 7-1/4 while the 8-1/4 inch come thru installed on the 4WD Daks. Somtimes it seems that they installed whatever happened to be laying around the day the rear-axle was installed- LOL
My elliptic-shaped differential cover has 10 bolt holes in it. Also found when I took off the cover that there is a second metal tag under one of the two bolts that I left on while draining the oil. It has what looks like 3.5 stamped on it. The other tag has 3.189 stamped on it. The pinion gear driving the ring gear has several numbers painted in white on its end face inside the case. 4 and 1 are two that I remember.
http://www.ringpinion.com/DiffList.aspx?SearchMode=Diff&TypeID=2&Type=Chrysler
There is an interesting discussion about using a torsion bar from a 1970s era Chrysler/Dodge/Plymouth vehicle as a substitute for the special tool. Several posts in the discussion say the bar works perfectly, but the discussion ends with the man who asked the original question having his truck up on stands, the axles removed and a friend taking time off work to help only to find the torsion bar didn't fit!
http://www.dodgedakotas.com/boards/gen/19427.html
I'm thinking of haunting the local junkyards to see if I can find one of those torsion bars to do my job, but am I heading for the same problem as the poster on that discussion? I'll be doing this job lying on my driveway outside in a North Dakota winter, and would probably have to lie in the snow in the junkyard to remove a torsion rod, so I don't want to waste a lot of effort, and would really be grateful for any input.
kcram - Pickups Host
I'll bring the carrier to a local machine shop to have its bearings pulled and new bearings pressed-onto the carrier.
I got an old Chrysler motors torsion bar from a local junk yard for $2 and found it measures very close to 1-1/2 inches across the flats of the hex end. However the hex end is too big to fit the differential bearing adjusters (as found by the man at http://www.dodgedakotas.com/boards/gen/19427.html). The hole in the adjusters is very close to 1-29/64 inches across the flats. I still don't want to buy the Dodge part and am thinking of having the same machine shop skim some metal off the six flats of the torsion bar so it will fit the adjusters. It all depends on how much they would charge and whether they can machine that kind of metal.
It really didn't take too long to establish the amount of backlash (free movement) between the pinion gear and the big ring gear. Before removing the differential carrier, I just stuck the dial indicator against a ring gear tooth and worked the ring gear back and forth by hand (the axles had been pulled from their tubes) until it looked as though I had found what seemed like the average backlash all around the ring gear. I suppose I checked four different ring gear positions.
Then I loosened the carrier bearing cap bolts and eased the heavy carrier out and inspected what I could see. It all looked good except for the carrier bearings, which were badly pitted both on the rollers and the race surfaces.
I installed the whole business, following carefully the procedure found in http://www.dippy.org/svcman/sm03a.html
It was a little difficult getting the little pinion gears of the "spider" into the right positions to mesh with the side gears and then slip the pinion gear shaft back in. The pinion gears kept falling out and I had to reinstall them and sometimes search for a cup washer that would drop into recesses in the case. Eventually I got them in, slipped their shaft in, and soon had it all in and looking correct.
I continued on, checking the ring and pinion gear backlash then going from side to side of the pickup, using the big torsion bar to reach down the axle tubes and tighten or loosen the carrier bearing adjusters until it seemed to me from the dial indicator readings that I had a suitable backlash, then I tightened the carrier bearing caps and using a borrowed plumber's pipe wrench on the end of the torsion bar, put a guessed 70 ft-lbs of torque on the adjuster on both carrier bearings.
My only mishap was to read 90 in-lbs as 90 lb-lbs for the torque to put on the bolt securing the adjuster lock. (It seems those small bolts actually don't need as much torque after all!) I sheared a bolt and had to go to NAPA to get a replacement. The salesman there recommended I buy a set of left-handed drill bits to back the sheared bolt out. It worked! I never knew there was such a thing as a left-handed drill bit before that day.
Putting the axles in was an simple job, and the "C" lock rings on the end of the axles go in easily, although they liked to fall out of their slot into the gears and dark places in the case if I was not careful. Amazing that those little rings are the only things preventing the rear axle from pulling out of the differential.
I used Royal Purple "Max-Gear" 75-90W lubricant because the race performance shop had only that and Shaeffer oils in stock. Maybe I should have gone by often-repeated recommendations on this board and got Red Line. As it was, the Royal Purple cost $14 a quart! Well, it's in there.
There is an interesting study done by Amsoil comparing all the differential lubes that makes it look as though Royal Purple wasn't the best choice. The study is available to read on-line through
https://www.amsoil.com/products/gearlubes/WhitePaper.aspx?zo=1173195
I cleaned up the cover and differential case and put sealant (butyl rubber calk-hope it works out) and bolted it back on. So far, no trace of an oil leak there or at the axles.
The hardest part of the whole job was putting the rear brakes back on. All the springs and adjusters and tangs and slots that have to fit just-right made it a real time-consumer for me.
With that finally done, I soon had the tires back on and the pickup off the jack stands. Generally I get so excited at the end of a big job that I rush the "tires on the ground" step. In the past, I have forgotten about a bottle of welding gas behind a car and knocked it over, and on another occasion forgot about axle stands and backed off them and put a big dent in a fuel tank. This time I actually looked around the pickup and underneath for any potential dangers before getting behind the steering wheel and starting the engine.
The rear end is quiet now, and the swishing/grinding noise is gone. However I notice a whining that comes and goes with load, and I think it might be the pinion gear-ring gear adjustment being a little loose. If the noise is too much I might eventually do something about like what was done on a Jaguar as detailed by a real do-it-yourselfer at
http://bernardembden.com/xjs/diff/index.htm
Even though I have rebuilt engines and maintained mechanical things all my life - I do not think I would attempt what you have done.
I suppose you were NOT laying on your back in a dirt driveway - LOL
I have been busy but using my 01 QC 4x4, 4.7,auto. Just turned 100k miles. I had to replace front driver bearing @85k and just did passenger front at 99k. Now I notice the driver output side on the front differential is leaking. Sort of out of the seal where the axle shaft goes in. Anyone else have this. Could it be my axles need to be replaced. ( I do hear clunking noises from the front end when I go over slight bumps-but I live with it.) they do not seem to make noises when I turn -so I thought the cv's are ok. It's almost as if somthing is loose. Could it be play in my axles? anyone have any experiences with these problems?
Thanks for any and all input.
Tom.
The noise I had came from one of the inner CV joints and was truly scary. I thought I was breaking the driveline into pieces. I took the inner CV joint apart, and one of the balls was slipping out of its race and back in. I popped the ball back in and closed-up the CV and hoped for the best, and kept driving for five years. I just couldn't see paying big-bucks for a new inner CV joint. It seemed the only rebuilt ones were the outer CV joints because they are generally the ones to wear-out and I suppose there is a bigger market for them.
Somehow I went for five more years and then bought two reconditioned inner joints from a man in Ocala, Florida. He is an interesting character, a veteran of the U.S. Army airborne and now supplying CV joints for any car you can name (I think).
I don't know if your scary noise and shock is from a CV joint but it could be. Sorry I can't be much more help, but best of luck to you!
The true synthetic basestock (NOT like Mobil1) of RedLine has protected all my Dakota gearcases. (manual xmission, xFerCase, differentials...etc)
I anticipate that my gearcases will never EVER have any measurable wear due to running RedLine lubes. (Over the useful life of my Dakota.)
So for those of you that have replaced your front shocks on a 2WD dakota, what tool did you use to remove that top nut? Did you use a socket wrench with a long extension? Did you use an impact wrench?
I'm welcome to any other advice you may have for removing the front shocks.
Thanks!
I know when I have water in my rear differential by kind of a “groaning” sound coming from the rear end. One of the mechanics who has worked on my Dakota has told me the “groaning” sound comes from the rear differential clutch plates not being properly lubricated because of the water. It has only been 5K to 6K miles since my last fluid change and I am getting the same old “groaning” sound out of my rear end so I know I have water in it again. I only have about 35K miles on my Dakota.
Has anyone else had a similar experience with their Dakota? I live in the NW so NOT driving in wet conditions is NOT an option. I do not believe I have ever completely submerged the rear differential in standing water but we have had some extremely wet driving conditions here in the NW the last couple of years. I have two years left on my power train warranty and I am concerned that once the warranty expires I will all of a sudden be told that I need my rear differential repaired or replaced.
Moisture can and will accumulate in a differential assembly through the vent...over time. As the differential assembly heats up, internal air is expelled through the vent. As it cools down, outside ambient air is drawn back in. Over many heating and cooling cycles, moisture will build up in the fluid from outside air. Routine differential lubricant changes will ensure that the moisture content never gets to a high enough level to cause lubrication problems.
If this is happening in 6,000 miles I would have to say there's some other dynamic at work here. I would check the position of the vent hose and ensure there it is correctly positioned, free of cracks, and no signs of poor hose connections that might permit water from entering at a low point.
I guess it is possible that excessive moisture can build up if this vehicle is predominately driven in high moisture environments. For example, if the truck sees duty on more rainy days than dry days, then this might cause your situation. It would be unusual in my experience, but not impossible. But you'd have to eliminate all other possibilities before you could confidently declare driving conditions as a cause.
Regards,
Dusty
Rielly's sells one.
i have a 2000 dakota QC manul 6 cylinder. i replaced the battery recently. when i drive with my headlights on...the lights start flickering. (headlights, dashlights..pretty much all the lights) also i hear this clicking when the lights are flickering. when the car is off and just sitting there, i c in the headlight that there is a very dim light that is on. i have to 2 disconnect the battery so it wont drain my battery.
plz help!
4x4. What a difference! The old struts only had 24,000 miles on them, but it's obvious now that they were shot.
The new struts have eliminated the floaty feeling I've hated since I bought the truck a few weeks ago.
I used Monroe 'Sensatrac' struts, which were pricey, but worth it.
If you've got access to a spring compressor; the job isn't too difficult, either.
Steve
BTW: The very best shock absorbers for the Dakota are still the Edelbrock IAS (Inertia Active System). They are true MONOTUBE shock absorbers which are far superiour to the dual-tube desgn that the el-cheepos use.
I put Edelbrock IAS on my Dak within the 1st year of purchasing brand-new and have never regretted it. Not only does it RIDE better and not jump sideways over expansion-jounts... when I hit the brakes, my truck does not do a nose-dive. (Becasue IAS knows it is not a bump in the road and stiffens up the front shocks under braking)
I've only found two manufacturers of struts for these Dakotas: Monroe and Rancho.
The Rancos are said to 'stiffin' the ride considerably. I'm not an off-roader, so the Monroes were my preference.
I just hope they last longer than the originals did. (24,000 miles).
Steve
It is my experience that when there are not many aftermarket parts available... there may be a design flaw which the aftermarket folks do not want any part of.
For example, on my 2000 Dak, the balljoints were known to snap off. The very best balljoint manufacturer (Moog) did not list any replacement balljoints for many years... why? because the design put too much stress on the balljoints and they knew if they sold a replacemet, it would also snap.
Another example: My ol 1981 AMC Eagle would eat front shock-absorbers no matter what I installed... I ended up paying Midas to install "lifetime warantee" shocks....Midas ended up replacing those shocks at least 3 times for free. (I got my moneys-worth out of that)
Good luck with your new shocks... I hope they last the life of your Dak.
If they wear out prematurely; I may look for a shop with 'lifetime' shocks, too.
On the plus side; the '06 Dakota rides almost as smooth as a car.
Steve
I think the conclusion that they are not going to be durable is premature.
Anyway, I have never had to replace a strut on any of my cars (Plymouth, Dodge, Chrysler, Nissan, Toyota, Hyundai) and my girlfriends Concode LXI is still sporting the originals at 165,000.
Only time will tell.
Regards,
Dusty
Based on several posts I've read regarding the life expectancy of the original shock on the front ends of these trucks; it appears the factory strut is not durable. I'm hoping the Monroe cartridge I've installed will last longer than 24,000 miles, as did the originals.
Steve
Dusty
130.9 inch wheel base (All except RT) 2wd
Caster = 3.13 degrees
Camber = -0.00
Toe = 0.10 degrees
130.9 inch wheel base (All except RT) 4wd
Caster = 3.16 degrees
Camber = -0.00
Toe = 0.10 degrees
Regards,
Dusty
A bad freeze plug is highly unusual problem on a 3.9. I haven't heard of a rusted out shackle before now, either. Unfortunately ball joints replacements were common for Dakotas of that vintage, and even up through 2003. They had a recall on the uppers.
I've heard a number of Dakota owners ay they wouldn't buy another, but I've heard more say they would. What most don't consider is the fact that a Dakota is a far heavier and more capable truck than a Ranger, S10, Canyon, Tacoma or a Frontier. My '03 Sport the way it is equiped is rated just a few hundred pounds less for towing than many full size trucks. And you know, after ten years or so I hear owners of competitive makes recounting their repairs, too. I think Frontier owners replace various engine sensors and brakes on a routine basis, Ranger folks seem to have the full gamut of issues as Dakota owners, I know of two Tacomas that the frames rusted through rendering the trucks unsafe to drive, and Canyons...well, I just won't go there!
Unless my requirements for hauling and towing change, I'd buy another Dakota without reservation. If I didn't need as much truck as a Dakota, I'd probably look at a Ranger or a Frontier. Since our last Toyota was not a stellar vehicle, I think I'd pass on a Tacoma.
Regards,
Dusty
Regards,
Dusty
However, it would be best to troubleshoot and isolate what the problem is..... losing your steeing is NOT somthing you want to happen.
Lift BOTH front wheels off the ground and use your hands to try and 'wiggle' each wheel in all directions. Check all steering-linkages, tie-rod-ends and other steering components. Any play HAS to be isolated and fixed.
He didn't state in his mail note, but I've seen this problem before. I'm betting he's got a two-wheel drive.
Best regards,
Dusty
Here in Vermont... a 2-wheel drive truck is nearly unheard of so I assume all trucks are 4X4.