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33's or 35's with a 4" suspention lift stock gearing?

Discussion in 'The Garage' started by dasanii19, Mar 27, 2007.

  1. dasanii19

    dasanii19 1/2 ton status

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    I am still a little confused on what I should run. I have a 4" suspention lift and would like to run 35's but dont know if its a good idea. Heres what im debating between 33's and 35's so correct me if im wrong.

    35's:

    -Worse gas millege

    -possible fender rubbing

    -putting more stress on my gears

    -more money


    33's-

    -better gas millege (if much at all)

    -less or no fender rubbing

    -putting less stress on my gears

    -cheaper then 35's

    I know that either one of these tires were meant for the stock gearing I have in my truck but weighing the pros and cons between the two sorta makes me lean towards the 33's unless convinced other wise..??? Is what im debating between the two make sense? Im looking for practical rather then looks. I am looking into the BFG M/t's. The truck I have is a 76 K5 blazer.
     
  2. dasanii19

    dasanii19 1/2 ton status

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    The reason im worried about the gears being stressed and breaking is because I had to replace the stock spider gears in my 88 chevy twice times with 33's. Im not sure what to do here :confused:
     
  3. obijuan

    obijuan 1/2 ton status GMOTM Winner

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    it reall depends how you want to treat your tranny. prolly a 350 right? what gears do you have? i would say 35s cause therye awesome but 33 might be good. with 35 and 3.08 its a turd. so slow. no power. gotta think about that too.
     
  4. 1990k5fan

    1990k5fan 1/2 ton status

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    Well if I were you, I'd find an axle with 4:10's on craigslist.org and then buy the 35's.

    I bought 33 A/T tires back in August. They have 5k miles on them and I'm tryin to trade them plus cash for 35" mudders or something. Something with a more aggressive look.

    33's look small with a 4" lift and I really regret buying them :{
     
  5. dasanii19

    dasanii19 1/2 ton status

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    Yea its a th350 tranny, I may be replacing that soon though. as for the gears I think they are stock, I just had the front dif cover off the other day and wrote the numbers down I saw on the gears but dont remember where the paper went. I dont know if this would help determine my gears but its a 12 bolt in the front and a 10 bolt in the rear. When I had the cover off it said dana 40 or 60 I cant remember. :confused: does this sound like a standard stock gearing? or is it still hard to tell?
     
  6. obijuan

    obijuan 1/2 ton status GMOTM Winner

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    youve got a dana 44 up front and a 12 bolt in the rear iirc. check in your glove box and see on that little 6x5 sticker. it may say on there. the numbers etched on the ring gear should tell you all about them. search up and theres been alot of threads about how to decipher gear ratios. divide pinion teeth by ring gear teeth or something like that.
     
  7. Thunder

    Thunder 3/4 ton status

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    33s or 35s 6 of one half dozen of the other. Dont listen th the guys that say bigger is better. I mean what are you talking about 1, maby 1.5 stinking inch??? Frankly i preferr 33s with 3.73 or lower.

    Jees if you know how to drive 33s will be fine. Tire size does not replace skill.
     
  8. 1990k5fan

    1990k5fan 1/2 ton status

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    It all just depends on the look you want. If you want a beefy, aggressive look, go 35's.
     
  9. dasanii19

    dasanii19 1/2 ton status

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    OK, I FOUND THE PAPER!! LOL after rummaging through the trash can I found it..

    These are the numbers I copied off of the gears in the front diff.. PLLEEAASE someone decode or make some sense out of them..

    12 18 75 Dana 30060A

    A3D21 43-14
     
  10. Thunder

    Thunder 3/4 ton status

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    Yeah that is true.That meaty agrissive look looks great going over the speed bumps at the mall.
     
  11. 1990k5fan

    1990k5fan 1/2 ton status

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    That was not very nice. :mad:
     
  12. dasanii19

    dasanii19 1/2 ton status

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    Nobody?

    12 18 75 Dana 30060A

    A3D21 43-14
     
  13. mello_yello

    mello_yello 1/2 ton status

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    i think (someone correct me if im wrong guys) 43 is the ring and 14 is the pinion so u do 43/14= 3.08. i think
     
  14. dasanii19

    dasanii19 1/2 ton status

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    Can anyone verify? And that would be stock gearing I have correct?

    Do I have to switch out my whole axle to change my gears so that I can run 35's?
     
  15. obijuan

    obijuan 1/2 ton status GMOTM Winner

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    no you can just change the ring and pinion. its pricey to do it though, few hundred for just the gears new, and i definately suggest billing out that work to a pro. its ****ing hard to get it right. i would suggest all this being done at once, if you have a 4x4 shop, give them a call, im sure theyll be glad to help you out and probably regear for you too. did you look in your glove box on the RPO code list? do a search to figure some of this stuff out, its been covered in the exact same context as you have asked it.
     
  16. 80' 427

    80' 427 1/2 ton status Premium Member

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    It has 3.07 front gears most likely 3.08 rears. A dog with 235 75 15s.
     
  17. dasanii19

    dasanii19 1/2 ton status

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    So what can I upgrade to without swaping axles? I want gears that can handle both 33's and 35's. what would be worable upgrade with my stock axle? Keep in mind I have a TH350 tranny but if suggested I will get a TH400..

    My father knows how to set the gears, I do the research on what to get and he helps me put everything together. Am I looking at around $400 if I install everything myself?
     
  18. obijuan

    obijuan 1/2 ton status GMOTM Winner

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  19. Thunder

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    With a non OD tranny 4.10 gears will work good for all around use with both 33" and 35"
     
  20. dasanii19

    dasanii19 1/2 ton status

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    And just to verify, If I want to get 4:10s I will indeed have to get different axles as well? I cant put 4:10s in the axles I have on my truck now? Or I can but they wont be as strong? Am I catching on yet?
     

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