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ARGH!! 3.08

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by OFFRDK5, Jan 25, 2001.

  1. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    ARGH!! I just found out that my gear ratio is 3.08!!! How is this going to affect my off roading? I know lower is good but will they work? What should I change to and what ratio should I use since its a Diesel?


    SK-15
    J**P...it's whats for dinner!
    <A target="_blank" HREF=http://SK-15.coloradok5.com>http://SK-15.coloradok5.com</A>
    Roads? Where we're going, we don't need any roads!
     
  2. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    what size tires are you running or planning on running? also what do you plan on doing with your k5 rocks mud sand or snow?

    s.smith 77blazer lookin 4 mud
     
  3. blazen91

    blazen91 1/2 ton status

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    I feel your pain. I have the same. I'm running 33's and I'll let you know how it does offroad after the Big Bear trip. The 14bff I just got has 4.56's.

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  4. Wheels

    Wheels 1/2 ton status

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    Know the feeling. Just changed the 3.08 to 4.10 and its a world of difference. Top end is a little revy 3000 rpm @ 70 mph, but low end is great. Transfer case in low actually is low now. Running 33's and plan on a 700R4 upgrade next. If there wasn't any long rides or I trailered it, would leave the TH350 in it. Tire size makes the difference. Recommended for 33's is 3.73 to 4.56 with 4.10 being the middle of the road. Find out the power band you want to operate in. Being a diesel wont matter. 3.08 really suck for any low range/off road work and for pulling, they bog going up hills without anything behind it. Put a trailer behind you with 3.08 gears and hills will seem like mountains.
     
  5. UseYourBlinker

    UseYourBlinker 1 ton status

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    I have them....running 33's too, it's not that bad. Only when I tow it sucks!


    <font color=green> No machines are perfect!</font color=green>
     
  6. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    Blazen91: When is this trip?

    Wheels: What kind of engine do you have?

    I am thinking I will want to goto 33's as soon as I get the cash and the lift and the...you get the story.
    How hard are these to change out? What should I do while changing these out? Also...can someone confim my axle ratio from the axle code that I found in some papers?

    kxyg2022

    The dealer says 3.08 someone confirm this bad news?


    SK-15
    J**P...it's whats for dinner!
    <A target="_blank" HREF=http://SK-15.coloradok5.com>http://SK-15.coloradok5.com</A>
    Roads? Where we're going, we don't need any roads!
     
  7. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    I've got 3.08's and 36's. I think I'm going to run 4.88's or 5.13's just waiting for the 14bolt and D60, so I dont waste 1000bones on 1/2ton pieces.

    <font color=blue>Professional <font color=red>JEEP EATER</font color=red>, it's a population control thing.</font color=blue>
     
  8. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    $1000!?!?!?!? Oh my!! Looks like I need to get a D60 and 14B before I do any gear changes!!!
    Would a junkyard have em?
    Also: I plan on doing a bit of everything with my K5...mud, snow, rocks, cars, J**ps,.....

    SK-15
    J**P...it's whats for dinner!
    <A target="_blank" HREF=http://SK-15.coloradok5.com>http://SK-15.coloradok5.com</A>
    Roads? Where we're going, we don't need any roads!
     
  9. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    You can pick these up at salvage yards most of the time. A shot in the dark but I'm guess'n for about $300 or so a peice.
    When looking for a 14bolt your best bet is going to be to find one off of a 73-87 3/4ton. Most of the time they will have 4.10 or 4.56 gears already in them. .

    <font color=blue>Professional <font color=red>JEEP EATER</font color=red>, it's a population control thing.</font color=blue>
     
  10. Wheels

    Wheels 1/2 ton status

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    It's a gas feed 350 4 bolt that peaked at over 340 ponies on the dyno with the old 76 cc heads. She was launching from a dead start but I could feel the TH350 tranny grunting with the torque and hp from one end and the 3.08 gears at the other. Took it out last night for the break in and after the 20 mile run, 30 min rest/cool down twice, I had to see what the difference was. When asked, she responded and that groan was no longer there. I bought the gears from Drive Train Direct $500, and did the installation. Not hard just tedious. Took 2 days for each axle (10 bolt in the nose, 12 bolt in the aft section). But the next time, I'll let someone else do it for $250 and axle.
    Thought at one time I found a D-60 and a D-44 with 4.10 gears but it turned out the guy who was selling them got took by some one else and they ended up being Corporate 10 bolts. Long story, but I know where a set is sitting under a Ph**d F-250 (he's a hunting buddy of mine who owes me a lot of favors that I'll think I'll call even for a good price on the pair) (it also has a NP 205 case).
     

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