rear differential
#1
rear differential
So my rear differential is toast and for some reason, it is very difficult to find a used one with the correct gear ratio. I keep finding ones with 3:55 gear ratio but no 3:90. Is it possible to rebuild the one I have and how difficult would this project be?
thanks in advance!
Sam
thanks in advance!
Sam
#2
#3
So my rear differential is toast and for some reason, it is very difficult to find a used one with the correct gear ratio. I keep finding ones with 3:55 gear ratio but no 3:90. Is it possible to rebuild the one I have and how difficult would this project be?
thanks in advance!
Sam
thanks in advance!
Sam
The following users liked this post:
SRAC76 (07-29-2019)
The following users liked this post:
SRAC76 (07-29-2019)
#7
You can either keep looking for another rear or put a 3.55 in and change the speed sensor. With it grenading going down the road, you have junk all through the unit. 3.55 is a good utility gear, does fine for medium towing and will give you better fuel mileage. I had one I bought new and it had the 3.55. Great truck. In 180,000 miles I had the steering rack fail at 110,000 and just maintenance other than that. You may find it's more of a hot rod with the 3.55.
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#8
I rebuilt the one in my 96 around 40k miles ago and added a new traklok limited slip at the same time. It too is a 3.91. the other 5 Dakotas I have had were all 3.55 trucks. My gears were fine, on mine it was the pinion bearings that went bad, I replaced all 6 bearings with in the rear end and all 3 seals at the time.
Tracklok came from my stash, bearing kit was $140, which never comes with outer axle bearings or seals but those can be had cheaply and that's even for the good brands.
Tracklok came from my stash, bearing kit was $140, which never comes with outer axle bearings or seals but those can be had cheaply and that's even for the good brands.
The following users liked this post:
SRAC76 (07-29-2019)
#9
#10
This is why you need to say what you have. I didn't know it was 4X4. Your differentials need to be gear matched. For a 3.55 rear end, you'll need 3.54 in the front to keep the transfer case from over running.