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gear ratio? 3.73, 4.11, 0r 4.53

Discussion in 'The Garage' started by ToolTimepits1, Jan 30, 2006.

  1. ToolTimepits1

    ToolTimepits1 Newbie

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    76 jimmy, 4sp np205. 6lug.
    35 boggers at the moment, wanting to go bigger.

    modified 350 carb, intake.

    3.73 in front and 3.08 in rear need to mach it up, will the 3.73 run alright with 35-38s.
     
  2. lrazer

    lrazer 1/2 ton status

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    3.73 would be a little high

    4.56 would be the best out of those 3
     
  3. tin man

    tin man 1/2 ton status

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    I think it will be kind of a dog with 373's and 35's. I liked 410's for my 36's. Some would say even that is not tall enough. With 38's it will 373's will make it a gutless wonder.
     
  4. fireplug

    fireplug 1/2 ton status

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    I really have to stand on the skinny pedal to get my 37's rolling with 4.10's I'm trying to decide myself what to move up to.
     
  5. wetbackZO

    wetbackZO 1/2 ton status

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    dude...I'm runnin 35's with 3.08 gears...it really sucks; currently saving up for 4.56 gears and other upgrades...
     
  6. jaredmajor

    jaredmajor Registered Member

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    I am the same, 3.08 with 35's, yeah it sucks.
     
  7. ZooMad75

    ZooMad75 1/2 ton status Premium Member GMOTM Winner

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    If ot 3.73's with 35's and its probably as low (numerically) to run with and still be able to get out of it's own shadow on the street. Ideally, 4.10's or 4.56 would be better for 35's. The larger ratio, gives the engine more mechanical leverage to turn the bigger tires. If you plan on going bigger than 35's, start looking at the 4.56 to 5.13 range.

    Best way to look at is like useing a 3/8" drive rachet to remove a lug nut. The handle is small, so you don't have enough leverage to bust the lug nut loose. Go to the tool box and grab a 1/2" drive breaker bar that is three times longer and the lug nut comes loose with much less effort. Same thing with gears and tires. Bigger the tire the steeper (more leverage) gear ratio you need.
     
  8. goldwing2000

    goldwing2000 Guest

    I got you all beat. When I bought mine, it had 35s and a 2.73! The dreaded GU2! :eek1:

    Man was that thing a dog.

    I swapped in the 3.42s off my pickup temporarily. It's a lot better but I'll be swapping in my 4.10 1-ton gear pretty soon. :bow:
     
  9. BIG*RED

    BIG*RED 1/2 ton status

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    I had 3.73 with my 35s, and it was ok..wouldn't win any races, and on a long hill it would lose speed..(dang 4 speed, luggin in 4th, screamin in 3rd) right now i have 4.10s..a little quicker from the start, and will now hold a constant speed on a long hill..if i had the money i would go 4.88s with 35s....

    when i worked at a drievtrain shop, thats what we always recomended...some would opt to go to 4.56s, but came back a month or two later wanting the 4.88s..
     
  10. Leper

    Leper 1/2 ton status

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    Go with the 4.56. If you go bigger on the tires, you will still be ok. I run 39.5 with 4.56, my over drive is awesome, my son runs 37s with 4.56, and my buddy runs 42" iroks with 4.56
     
  11. fireplug

    fireplug 1/2 ton status

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    What tranny's are you and your son running?
     
  12. u2slow

    u2slow 1/2 ton status

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    You can run and drive almost any axle ratio with the 465 trans.

    Find a $100 14bff w/3.73.... then start saving for a Doubler.
     

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