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Gears WAY WAY WAY to high

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by chevy4x4, Jun 7, 2000.

  1. chevy4x4

    chevy4x4 1/2 ton status

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    <font color=green>I was amazed when i saw this in an old issue of 4wheel & offroad. There was a pic of an 82 chevy sb step side with 44's running through mud. Thats not the problem. It has a 454 big block. No problem with that. But my problem is that the truck had the stock 10 bolt axles with 2.73 gears!! Yes 44's, a big block and 2.73. I just don t get this.

    I also notice lots of more trucks with stock gears and large tires.<font color=green>



    [​IMG]chevy4x4[​IMG]
    http://4x4.coloradok5.com
     
  2. laketex

    laketex 3/4 ton status

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    Don't need much gearing to pull on and off of a dovetail trailer.

    [​IMG][​IMG]
    Durant, Ok
    '79 Blazer in progress
     
  3. ken

    ken 1/2 ton status

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    Or run it in low range...let's see that '82 would have an NP208 case, at 2.61 redcution x 2.73 = 7.12 rear end ratio...a little low for freeway cruising, but better than 2.73s!!!

    ken
     
  4. BlazerGuy

    BlazerGuy 3/4 ton status

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  5. BlazerGuy

    BlazerGuy 3/4 ton status

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  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    I'm hating my 3.08's on 32's! can't wait for the 4.11's and 33's or 35's.

    Diging it in the dirt with my K5's
    Grim-Reaper
    http://grimsk5s.coloradok5.com/
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    I remember seeing that! I was a little stumped also.
    I used to run 35's with 3.08's and it was too bad.

    Mike
    1982 GMC Jimmy - Emmett
    http://emmett.coloradok5.com
     
  8. CrazeeBush

    CrazeeBush 1/2 ton status

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    I have the stock gears in my truck, and ws wondering what benefits I would get from going lower(numerically higher?)in gears? More low end power? Better gas mileage? Just curious. Right now I'm runnin 31" but I'll be getting 33" when these tires are gone.

    -JoSH
    crazeebush@aol.com
    http://josh.coloradok5.com
     
  9. BB454

    BB454 1/2 ton status

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    What is all the fuss about 2.73's? I run the same setup (454 + sm465 + np208 + 2.73 ) and I do not see the need to change anything. The overall performance of the truck is super. Oh and btw - it is not a trailer queen like some would sugest. This truck sees regular action at 4x4 events but does not have to hide from any @#$%$# SUV on the freeway when it comes to speed. I however have to add that I run 33's not 44's.

    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     
  10. nyyef

    nyyef 1/2 ton status

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    i have 33"s, SM465 and 4.11s. i am actually thinking of putting the 3.08s back. i am sick of 3500+rpm on the highway. and since the truck mostly sees soft sand and no rock crawling, i think it would be ok. i cant afford the overdrive 4L80 or converting to NV4500 (i need beef!!). when i had 3.08s before i had no complaints about performance.
    i had a k5 about 10 years ago with 3.08s and 32"s, never had a driveline problem due to high gearing.

    Knife.
     
  11. BB454

    BB454 1/2 ton status

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    It seems that some guys forget what the SM465 1st gear ratio does when it comes to crawling. Couple that to the equation and the facts becomes clearer. There is no need to take the bypass when the rocks makes their appearance on the trail. As for the U-bolt type of flanges on std. driveshafts - converting them to true flange couplers solves that problem once and for all.

    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     
  12. laketex

    laketex 3/4 ton status

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    well with the std I can sorta understand, but the 3.08s I had in my blazer with the TH350 and 31's sucked a$$. I couldn't powerbrake, couldn't rock it much in mud, just no bottom end. But a 454 and standard...well that's different. Or even dual transfer cases. Oh well. I think I'll stick with my 4.11s for now. With 36's, I thought it was too high myself, but that's with an auto tranny. Looking for a NV4500 swap next year though.

    Bryan

    [​IMG][​IMG]
    Durant, Ok
    '79 Blazer in progress
     
  13. chevy4x4

    chevy4x4 1/2 ton status

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    You guys think a Blazer could survive for a year with stock 12 bolt rear and dana 44? Stock gears and 35's? Only for a year and then a 14 bolt would be added. The Blazer would see mild off-roading and no highway driving.
    What do you think?

    [​IMG]chevy4x4[​IMG]
    http://4x4.coloradok5.com
     
  14. Eagle86K5

    Eagle86K5 1/2 ton status

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    Well I just put on 33.12.50's and have 3.08's and I noticed a bit of a difference, but nothing to complain about, except that I had a 2" lift put on and now have a vibration at 20,30 and 55.....scratching my head.....

    <font color=green>[​IMG]Eagle86K5[​IMG]<font color=red>
    Masonry...It's a Good Thing
    2B1ASK1
     
  15. BB454

    BB454 1/2 ton status

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    I think it should survive a year easily. Have a go.

    Ray - have a look at your universals. Could be that they were not put back were they came out. Did you mark them before removing them?

    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     

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