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  1. #1

    Default Standard transmission for 89 1/2 ton 4x4 Sbn

    My 1989 4x4 5.7 TBI currently sports the ubiquitous 700R4 tmission. It has never given me any real problem, but I'd like to travel in my vehicle, and I just don't really trust the 700R4 at 180,000 miles. I'd like to convert to a standard transmission, and am looking to find a suitable standard transmission.

    Compound low is really not necessary in my application, since the xfer case would provide crawl speed low if necessary. Can anyone say what should be readily available that will somewhat fit? Has anyone else done same?

    I've seen new 5 speeds with 1:1 top gear, and new 6 speeds with overdriven top gear, very pricey.

    Thanks in advance for any insight.
    Slim.

  2. #2

    Default

    Welcome to the club, Slim. The 700R4 has been around long enough that the weak points have been found and corrected by the aftermarket companies. You can make them almost bullet proof. I would look at shops like FinishLineTransmissions for a remanufactured unit. I'm sure it will be alot easier than changing to a 5speed.
    :cool:

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.
    :glasses:

  3. #3
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    stephan's Avatar
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    X2 what STB said. I had Jet Transmission build a 700R4 for my '88 & it's flawless. I tow a 7,500 lb boat with mine & not a single problem.
    Welcome to the GM truck club.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  4. #4

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    I got the original 700r in my Burb with 190K and tow a boat 300 days a year, doesn't skip a beat.
    1989 GMC Suburban V1500 1/2 ton 4 x 4 350 c.i. f.i. 4 spd auto 187,000 mi and counting.....

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