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help me with gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigoltrux77, Aug 17, 2002.

  1. bigoltrux77

    bigoltrux77 1/2 ton status

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    i have another 77 blazer.its got 35's and 4" susp. and 3" body. The rear end is stock 12bolt with stock gears and 10bolt upfront with same.i really want to upgrade the gears to 4.10's or 4.56's. its gonna be my street truck, and i want it to have good lowend torque. i know nothing about switching gears. How much will a gear place charge me to put in 4.56's in the back? Or should i just get a 14bolt with 4.10's from a junkyard. How much wil that cost to buy and install. Im clueless!
     
  2. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    to have gears installed around $1000-1500
    to buy a 14ff with 4:10's under $300 (should be able to find one for around $100-150)
    find a matching 3/4 ton front with 4:10's should be able to find one for under $300
     
  3. TXsizeK5

    TXsizeK5 1/2 ton status

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    Well yes buying the actaull axles would be cheaper than swapping gears. But Then you have to take the axles from the junkyard and install them in yours. If you dont have many tools or arent very mechanically inclined. Go for gear swap. I got 2 sets of 4.56 gears with the install kits for 410 dollars. And I got a shop to install both for about 625. Costin aroun 1 grand. They are great and havent failed me once.. I also am running 35's as a daily driver/weekend offraoder.
     
  4. bigoltrux77

    bigoltrux77 1/2 ton status

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    do i have to get front gears so soon? all i use right now is the rear. its just a daily driver.
     
  5. TXsizeK5

    TXsizeK5 1/2 ton status

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    You can just get the rear gears first and installed. Its also cheaper for rear install. Itll prolly run ya bout 250-300 for isntall plus price of the gears But dont ever put it in 4wd.
     
  6. bigoltrux77

    bigoltrux77 1/2 ton status

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    what happens when you put it in 4wd and you have 4.56's in rear and 3.08 upfront?
     
  7. 70~K5

    70~K5 1/2 ton status

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    bigoltrux77 asked
    "what happens when you put it in 4wd and you have 4.56's in rear and 3.08 upfront?"

    Something will break is what will happen. Could be a simple as a ujoint or something bigger.
     
  8. 76_Cheyenne

    76_Cheyenne 1/2 ton status

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    I have basically the same set up as you and just bought new gears. Except I have a 44 up front. Do both axles at the same time, pointless and more expensive to do one at a time. Call Reider Racing, they have great prices and service. But this is what you will need. I'm putting 4.10s in and in order for that to work you need to change the carrier in the front and the rear. The 3.08 carriers only can handle up to 3.73 I believe. So you're going to have to install some sort of aftermarket traction device in the rear, whether it be a locker or L/S. I went with the Eaton Posi. for about 315$ Also my Dana 44 needed a new front case, 55$ to fit new gears. so my total for gears/ f/r , f/r overhall kits, 44 case and Eaton posi and shipping was 913.93$ Then you have to get them installed, luckily I have a mechanic who will install them for 400$ instead of Randy's Ring and Pinion for 1000$. I also beleive you might be able to keep you stock carriers if you buy thicker gears?? call or go to reiderracing.com and check them out.
     

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