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Thread: 4L60E Transmission Modifications

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  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    This is a common question on the board so here is a link to Hit Man X's post over on GMFullsize

    http://www.gmfullsize.com/forum/showpost.p...mp;postcount=40

    As mentioned in the post, pay particular attention to clearances and backlash.

    The Electronic Pressure Control to vacuum modulator control device is Transgo kit 46MOD available from Oregon Performance Transmission or TransmissionCenter.net.

    The most common shift kit is the Transgo 4L60E-HD2 model though they do sell a simple shift correction kit.

    The Raybestos Blue Plate Special 3-4 clutch pack comes with instructions to drill a #58 hole to vent residual oil out of the input drum housing, from behind the piston that actuates the 3-4 clutch pack.
    http://i47.photobucket.com/albums/f197/red...t/5-31-2007.jpg

    Feel free to add to this post any good information or part numbers.


    Good items to have for a stock+ rebuild...

    Transtar PNs...

    Transgo 4L60E-HD2 kit
    Corvette 1-2 and 4th servos if stock converter and billet servos if 3000+ rpm stall converter
    Aluminum forward accumulator piston
    Aluminum 1-2 and 3-4 accumulator pistons
    Complete gasket/seal kit for appropriate year model transmission
    new transmission filter. Make sure to measure the depth of your pan to get the correct one.
    three bonded piston seals
    New valve body spacer plate
    "Beast" sunshell
    if 2nd gear was slipping get a new or rebuilt reverse drum
    New Borg/Warner clutches and band
    New steels

    Here's what I'll order for someone that already has the shift kit and Corvette servos...
    Master kit 4L60E (W/ PISTONS) DEEP PAN............................................... ................ 97-03........ 74008EC
    includes clutches, steels, filter, gasket and seal kit, metal clad seals and 2nd band
    Reverse Input Drum (No Check Ball) (Large Feed Hole)............................................. .. 3/87-Up..... 74556B
    Plate, Valve Body To Case Separator, 4L60E (Transgo)......................................... ....... 96-05...... 74747EC
    Piston, Forward Clutch Accum, 4L60E (in Valve Body) Aluminum...................................... 1 93-Up... 74741G
    Kit, 1-2 & 3-4 Accumulator Piston (.310” Pin Dia) (Pinless Design)............................ 1 82-Up.......... 74927K
    Shell, Reaction Sun (The Beast) (incl. Special 4 Tang Washer).................................... 1 82-Up...... 74624A
    Last edited by RedHeartbeat; 02-05-2009 at 11:25 PM.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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