3.42 gear ratio?

[500magnum]

I'm looking for a set of good used 3.42:1 ring & pinion for a '89 3/4 ton with a 14 bolt, 9.5" diameter ring gear. Does anyone have some or can tell me what year of models will work? Thanks

[veager]

I put 3.42's in my 88, but I think my ring gear was larger.
Anyhow, I had a hard time finding a set and ended up getting a set from Yukon Gear as nobody else seemed to make them anymore.

[500magnum]

If yours were larger, then you probably had the 10.5" ring gear and it would have been very difficult to find a used set of 3.42 gears for it. The 9.5" ring gear was offered from the factory with 3.42 gears and I don't think the 10.5" ring gear ever was.

[6.5 Detroit Diesel]

Actually I have a 10.5" Carrier w/ ring gear right now that is a 3.23:1, probably not factory, but I do know that they had factory 3.42:1 for the FF.

[More Power]

While rare, the 3.42 gears in the 10-1/2" FF was an option in the GM trucks/Suburbans. As mentioned above, Yukon Gear www.ringpinion.com (http://www.ringpinion.com) (aka Randy's Ring & Pinion) sells the R/P set.

I'm currently running Yukon 3.42's (http://www.thedieselpage.com/reviews/randys.htm) in the 9-1/2" 14-bolt under Lil Red. :)

Jim

[6.5 Detroit Diesel]

:Lil Red, man it would be nice to do a project truck like that. :D