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3.08s and 35s

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by SWIVEL, Jul 29, 2001.

  1. SWIVEL

    SWIVEL Registered Member

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    i got stock 3.08 gears and was wondering if 35s are too big or if i should stick with 33s for now till a gear swap. my rig is about a 70/30 daily/mud driver.
     
  2. wayne

    wayne 3/4 ton status

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    3:08's with 35's would suck.

    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>I had 3.07s with 33s and it was miserable. I was always dropping down to 3rd on the highway and I had to use 1st to start off from a stop more often.</font color=blue>
     
  4. solowookie

    solowookie 1/2 ton status

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    I got 3.08's and 31's and it's terrible! I'm going to 4.10's within the next week.

    [​IMG] <font color=blue> Jeff </font color=blue> [​IMG]
     
  5. outlaw612

    outlaw612 1/2 ton status

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    Im currently running 33's and 3.08's. It sucks! There is no such thing as acceleration.
     
  6. SWIVEL

    SWIVEL Registered Member

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    i did not realize it would be that bad even with 33s. how hard are gears to swap?
     
  7. Pure Insanity

    Pure Insanity 1/2 ton status

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    Have you ever watched how slow a slug moves. You would be just a little faster.

    On the flip side tho once you get going you could prob. run 185 MPH at just above idle!!

    Seriously tho, I would say 4:10 min. for a gear.IMO.

    Of all the things I've lost, I miss my mind the most!![​IMG]
     
  8. Rockjunkies

    Rockjunkies 1/2 ton status

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    I ran 35's w/3.08's. Wouldn't recomend it. Had no power, mpg was terible. Fried my automatic tranny when I tried to wheel. It might would work better w/ a 700r4 or 465 4 speed, but not a turbo 350.

    Keep it simple!
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I did too. I had 2.73s and 31s, truck was gutless. I had 3.08s and 31s, 33s, and 35s, and with all it was totally gutless with an overdrive automatic. With 3.08s I had to stay in 2nd gear most of the time, sometimes at really high speed I could get into 3rd, never overdrive.

    You will absolutely destroy your transmission. I know this sounds stupid, but if you've got 3.08s, put 235/75R15s on your truck and save your tranny. You need 4.56s.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  10. MudFrog

    MudFrog 1/2 ton status

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    My old truck:
    3.08's + 35" thornbirds = 4 700R4 trannies in the 1 1/2 years I owned it.

    89 K5 Silverado
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  11. shawnboy

    shawnboy 1/2 ton status

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    I run 33s with 3.73s and have no problem.
    Shawnboy.

    If you are having too much fun it's probably illegal.
     
  12. mpascino

    mpascino 1/2 ton status

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    I know everyone is against it, but I ran 3.08's and 35's for a year. It really was not that bad. Gas mileage went way up on the highway. if you are planning on regearing don't waste the money of 33's , there will not be a big difference between the two. When you wheel just use low gear and a little common sense. Good luck.
    Mike

    You call that dirty!?
     
  13. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Way up? You're a flat out liar. My gas mileage was so horrible with 3.08s it was insane. It was like gas was free.

    You must really have a motor if it can push your truck 60 MPH at 1000 RPM.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  14. HispanicPanic

    HispanicPanic 1/2 ton status

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    first of all you will fry your tranny with 35's specially if you have a 700r4 when i had 33's and 3.08's and at 3,000 RPM's i was doing a 110mph at 3,500 i was at 125mph i know cuz a friend of mine was behind me in a 98 camaro and i have a TH350, TRUST me you dont need to be going that fast

    BEER-- one is none, two is half, and three is one.
     
  15. blazentank

    blazentank 1/2 ton status

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    I had 342's with 35 inch boggers blew my 700r4 transmission in a month i have gone back to 33's wouldn't reccomend it
     
  16. mpascino

    mpascino 1/2 ton status

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    I have a TH-350 trans, no overdrive buddy. Rethink your statement a little. I turned about 1850RPM at 60 with that set up. Only thing done to my motor at the time was a cam and computer chip. I went from maybe 11 on the highway to about 15-16mpg. That's about 120ish miles more to a tank. Seems a lot to me. Also having a tranny that is built right helps....you can lose a lot of power thru a crappy trans. Mileage with a 700r-4 would suck because in Over drive at 60 your RPM's will be too close to the convertor stall speed . You would consistantly beshifting between 3rd and 4th gear.

    You call that dirty!?
     
  17. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    I had 36's and 3.08's... suck suck suck...!!! Don't do it! [​IMG]

    I removed my quote so gay, vegetarian, minority, eco-nazis who love Jesus, nuke spotted owls, vote Gore and smoke medical marijuana won't be offend.
     
  18. Jason73K5

    Jason73K5 1/2 ton status

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    I ran 35's with 3.08's on my old '85 for a couple of years and drove it hard with no problems. You WON'T fry your transmission just because you went to bigger tires. Your gas mileage will suffer some, but not horribly in my opinion. I had plenty of power for every day driving and was even able to smoke a tire pretty good under the right conditions. It's not the best combo for rock crawling, but for mud, sand and general trail riding, this combo works fine. If your transmission is already weak, has been giving you any kinds of problems or has excessive mileage on it, then you might want to think ablout a quality rebuild before the swap. If it's an overdrive transmission, then you'll want to do all but highway driving in D, not OD, this will minimize uneeded shifting and premature wear. I say go for it and then decide what RPM range you'd like to be in, you can always swap out gears later on.

    73K-5: TBI350/TH-400/NP-203/14FF/D44
    Topless, doorless and no tailgate!
    Fresno, CA
     
  19. Jason73K5

    Jason73K5 1/2 ton status

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    Better gas mileage with 35's and 3.08's is possible on the highway. I believe I used to get about 16mpg on the highway, I never drove as slow as 60 though, normally around 75 for me. My around town mileage was worse though.

    73K-5: TBI350/TH-400/NP-203/14FF/D44
    Topless, doorless and no tailgate!
    Fresno, CA
     
  20. nyyef

    nyyef 1/2 ton status

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    i agree with mpascino and jason. i have 308s and 33s. i am not saying it is a drag racer, but it does what i need it to do on the street. i use 4lo more often than most. BUT, i do get about 15mpg on the highway @ 75mph.
    i used to have a stock motor and acceleration was not good. after the headers, flowmasters, carb, ignition, and mild cam things improved dramatically. and i am happy with it.
    use whatever combo you want to serve YOUR purpose.

    Knife.
    knife.coloradok5.com
     

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