Which gears ???

[82dieselburb]

My Jimmy project is several months behind schedule as usual.I finally got the wiring done and fired up the 6.2 last week.
Before I buy my front detroit I want to make sure I'll be happy with the gears.I already have 4.10's that i was going to reinstall, but I think I should go with 4.56's or 4.88's
I'm running a SM465 203-205 doubler with 39" Irocks.The truck will see the trails 99% of the time,so I'm not worried about highway rpms.
So I'm looking for some input on which gears to go with.
By the way the 6.2 is NA,but I am planning on putting a turbo on it in the near future.Thanks

 

[tRustyK5]

I really like the 4.56's with my 39.5's. Plenty of grunt around town and tolerable on the freeway. If it never sees the freeway I'd consider some 5.13's...

Rene

 

[cbbr]

My 4.10's are not quite enough off road with 35's. Get at least the 4.56's

 

[82dieselburb]

Hmm 5.13's I didn't even think about them
That would give me one hell of a crawl ratio in granny gear with the doubler

 

[tRustyK5]

For a 99% trail rig I don't see a reason not to run 5.13's. Should be a real good parts breaker with the diesel, 4 speed, doubler and 5.13's!

132.4:1 crawl ratio

Rene