How would I identify my front diff. In reference to i'm looking at replacing the axle shaft bearings and they have the following note "4WD, IFS 7.5 in., 6.7 in. Ring Gear " I have a 1998 Sr5 manual with a 3.4. I also have found a used diff with a note of " 1996-00 Toyota Tacoma 4Runner Front Axle Carrier Auto Disconnect 4.10 Ratio Differential." Any help would be greatly appreciated thanks.
Front diff ?????'s
- Thread starter 983RDGEN
- Start date
Register to hide this ad
Your front diff will be a high pinion 7.5 reverse cut. similar to the tacoma front diff.
JWaldz
Moderator
All 3rd gens come with a high pinion 7.5 front diff. It's the gear ratio that you have to be sure to have correct as it has to match the rear gear ratio. The automatic disconnect (aka ADD) was in majority of the 3rd gens but not all. That system is actually obtained through a tube like piece that connects to the side of the diff. Here's a good link to help you out.
Erik's Toyota Differential info
Erik's Toyota Differential info
Last edited:
steezemcqueen
Moderator
^^^What he said.
Only thing i will add is that all 3rd gen 4Runner's came with ADD. None had manual hubs from the factory.
Only thing i will add is that all 3rd gen 4Runner's came with ADD. None had manual hubs from the factory.
JWaldz
Moderator
True dat.. I forget it was only the taco's and the 4runners had to swap to non add for manuals.
Well I thought I was going to be able to replace the needle bearings. After removing the diff the afternoon I found that now only were the bearings completely tore up from the axle shaft breaking there is also two teeth sheared off of the ring gear so looks like I'm going to be putting in a used diff. Any advice on how to go about finding out what gear ratio I have?
Erik's Toyota Differential info great write up thanks for the link very very helpful information.
Yea i was very surprised to see that the teeth were broken myself. It started out as an axle shaft sheared in half inside the diff. The only thing i can think is that the needle bearings got wedged in the ring and pinion thus creating catastrophic failure:happens:
