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Gear ratio

Discussion in 'The Garage' started by CR, Sep 1, 2004.

  1. CR

    CR Registered Member

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    87 K5 w/ 6 inch lift , 36's , 700R4, 350. Sees medium off- road use. Which gear ratio do you think would be best 4.10 or 4.56 ? Street driving is a factor.
     
  2. Z3PR

    Z3PR Banned

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    I'm going 4.56's.
     
  3. ugly_blazer

    ugly_blazer 1/2 ton status

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  4. 84_Chevy_K10

    84_Chevy_K10 Banned

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    4.88 for 36s/overdrive
     
  5. Z3PR

    Z3PR Banned

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    [ QUOTE ]
    4.88 for 36s/overdrive

    [/ QUOTE ]I was kinda thinking that too. But I'm no expert by any means.
     
  6. smprider112

    smprider112 1/2 ton status

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    ya with OD i'd say go as low as u can...5.13's maybe but I would prolly go 4.88's if it where me /forums/images/graemlins/thumb.gif
     
  7. CR

    CR Registered Member

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    That low? The guys at the local shop say even 4.56's were to low for the correct rpm's. /forums/images/graemlins/confused.gif
     
  8. ugly_blazer

    ugly_blazer 1/2 ton status

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    Go HERE and figure it out, then go tell the guys at the local shop they don't know squat.

    BTW - Your transmission ratio in OD is .7, and your transfer case ratio in Hi range is 1.
     
  9. ugly_blazer

    ugly_blazer 1/2 ton status

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    [ QUOTE ]
    4.88 for 36s/overdrive

    [/ QUOTE ]

    This is what I would pick also, but only 4.10 and 4.56 was offered as choices. If you are re-gearing I would go 4.88, if you have a 4.56 already set up then run it.
     
  10. smprider112

    smprider112 1/2 ton status

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    ya unless yer running a non OD tranny....U can go way low! they are prolly just shooting ya those gear ratios cuz they either dont know much or didnt realize u have overdrive /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
    Im currently running 4.10's w/sm465 and 38's and I really wanna go way lower, like 4.88's or even 5.13's!!
    Now with my diesel w/TH350 I'm gonna run 4.10's with 35's cuz I dont have OD and diesels dont like to rev to much!!
     
  11. ugly_blazer

    ugly_blazer 1/2 ton status

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    I have a TH350 trans and run 4.56 gears. It works out fairly good for a truck that sees some road use (gotta get to the mall /forums/images/graemlins/rotfl.gif). I have 3 sets of tires that I switch between, 35's, 36's, and 38's.
     
  12. smokkey1

    smokkey1 1/2 ton status

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    what is the rpm range for an small block to be comfortable in?
     
  13. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I prefer 2200-2600 for a lifted truck to cruise.
     
  14. smokkey1

    smokkey1 1/2 ton status

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    /forums/images/graemlins/waytogo.gif
     

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