I am wondering if the front and rear diff from a 90 4runner will work in my 88 4runner? Any suggestions?

 

Yes it'll work. 86-95 have the same axles. just make sure you're not putting a 4 cylinder rear diff on a v6 housing. you wont like the result the v6 diff can go onto the 4 cylinder housing, but not vice versa

 

thanks man I thought it would work I just wanted to make sure before I started.

 

yea should be fine, you might have to rig up the ADD if it doesnt have lockable hubs

 

not true.. a 8" toyota 3rd will fit in any 79-95 rear housing... regardless of v6 or 4cy... the 4cyl has smaller bearings but it will fit and is still strong enough to hold up to the v6. my brother has been running 4cyl 3rd in his v6 for years.

 

Mak, I think you were getting at using a 4 cyl ring, pinion and spiders into a v6 carrier. The axles don't make a difference, those go straight across.

Taken from "Erik's Diffs"

4 CYL......

All pre-'95 4-cylinder 4wd mini-trucks & 4Runners use the Toyota 8" 2-pinion differential front and rear (except turbo models). This is known as the "4cyl diff." This diff is by far the most common diff in older Toyotas.- Ten 10mm ring gear bolts
- 27 spline pinion
- 2-pinion carrier (case)
- V6 carriers can be used in this diff if the correct bearings are used
* LPH/SPH gear info: http://www.pirate4x4.com/forum/showp...3&postcount=73
** 4cyl diffs are swappable with the V6 and high pinion diffs.


'86-95 4cyl Turbo and V6* trucks and 4runners, and ALL '96+ 4Runners use the Toyota 8" 4-pinion differential in the rear. This diff is known as the "V6/Turbo diff." - Stronger housing than the 4cyl diff
- Larger carrier bearings than the 4cyl diff
- 30 spline axles
- 27 spline pinion (pre-'96)
- Ten 10mm ring gear bolts
- 8mm axle housing studs with 12mm nuts
- 4-pinion carrier (case)
- 4cyl 8" diff carriers (cases) do not fit without custom carrier bearing adapters ($) try Inchworm Gear
- A few pre-'96 V6 trucks and 4runners have been found to have come with the 4cyl style diff from the factory. Nobody knows why.



So it says the "diffs" are a straight swap, "carriers" are not.



The internals of differentials need some extra parts to make it work and can be done, but are not what we would call a "straight swap"

But as long as you keep them as the entire 3rd, they will swap straight across into whatever you want, well, relatively speaking.



To the OP.............

https://www.yotatech.com/forums/f116...osting-204178/

 

i bet they just wanted to use up some old stock that was left on the shelf...

 

????????


Who's they?

 

the factory.. of toyota... the used to do that type of stuff with vw beetles kinda jut gave them what ever they had..

 

gotcha, you had me all confused......

 

you gotta remember there was a big ression in the 80's and going into the 90's

a smart man will maxmize the use of out of everything before it hits the garbage can..