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Which gears ???

Discussion in '1982-Present GM Diesel' started by 82dieselburb, Jul 9, 2005.

  1. 82dieselburb

    82dieselburb 1/2 ton status

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    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
     
    Last edited: Jul 9, 2005
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    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
     
  3. cbbr

    cbbr 1 ton status GMOTM Winner

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    My 4.10's are not quite enough off road with 35's. Get at least the 4.56's
     
  4. 82dieselburb

    82dieselburb 1/2 ton status

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    Hmm 5.13's I didn't even think about them :doah:
    That would give me one hell of a crawl ratio in granny gear with the doubler :D
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    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 :eek1:

    Rene
     

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