krepas

hi

the front 7.5 axle on 4 runner 1995 it's different than 7.5 axle from 4runner 2000 are totallly different...but ring & pinion on those axles are different or no?

thanks

crolison

totally different

older = low pinion
newer = high pinion

the only thing compatible are lockers

krepas

Thanks...

iamsuperbleeder

this may be a dumb question, but why is it that even though everything is completely different, the lockers are still interchangable between them???

Matt16

The carrier size is the same, just the gear teeth are cut differently.

iamsuperbleeder

ah ok, I was just all "wtf?" there for a sec, lol

Matt16

Basically, as I understand it, in our trucks the front diffs are rotating "backwards" when traveling forwards. The gear teeth are stronger when the drive side is taking the load. On our trucks the coast side of the teeth take the load when traveling forward.

On newer trucks, they flipped the diff upside down, so the drive side of the teeth was being loaded when going forward.



From Pirate4x4:
Ring Gear Tooth Nomenclature

A – Top. The top of the gear tooth, a.k.a. Face, Top Land
B – Root. The bottom of the gear tooth, a.k.a. Flank
C – Heel. The outside-diameter-end of the gear tooth
D – Toe. The inside-diameter-end of the gear tooth
E – Coast. The concave side of the gear tooth*
F – Drive. The convex side of the gear tooth*

* Don’t be mislead by the terms “coast” and “drive”, as the ring-gear can be driven by the pinion on either side of the teeth. Which side of the teeth will depend on if the gear-set is standard or reverse spiral and whether the vehicle is going forward or in reverse.

iamsuperbleeder

pic no work... but I understand what you're talking about

krepas

Great info...

I understand the difference on our axle and newers...

Thanks from Mexicali Mexico....

Matt16

You're welcome from Vancouver, Canada.