All 88-95' V6 auto's with the aluminun rims [big tire package] had 4.88 r&p's.
88runner is correct
Instead of making a new thicker ring gear casting to fit the 4.10 diff housing, Toyota chose to simply cut the proper teeth on the 4.10 ring gear forging, and then made a new diff casting with the pinion moved closer to the ring gear.
This is a better design, since there is less enertia in the thinner [stock style] ring gear.
Remember, to obtain a higher numerical ratio, the pinion must have less teeth [smaller diameter], and the matching ring gear will require more teeth, but it must be thicker so the gears will mesh with the smaller pinion head.
The problem is that all after market r&p's have a thicker ring ring, so if the factory 4.88's fail, only the Toyota gear sets will fit. Hope you have $$$$$$. It is very hard to tell between a 4.10 and 4.88 casting.
« Last Edit: Jun 09, 2004, 08:18:10 PM by Marlin »
1980 Toyota - 1997 3RZ-FE 2.7l Engine, Turbo R151F 4.31:1, Triple Turbo Marlin Crawler Billet (2.28x4.70x4.70) = 1,148:1 Crawl Ratio, Marlin Crawler Twin Stick and Short Throw Shift Kits, 30mm H/D Output Shaft, High Angle Drive Lines, 5.29:1, ARBs, High Pinion Front, 25mm HD Billet High Steer Kit, 6 Pin Locking Hub Bodies, 86+ Wide Rear End, V6 3rd member, Chromolly Axles all around, 37" IROKs with Beadlocks, York onboard air - Rollbar air tank, Premier Power Welder, Marlin Crawler 4" USA-made Leaf Springs, Bilstein Shocks, et cetera....