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Thread: 4L60E Transmission Modifications

  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,689
    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; 02-06-2009 at 12:25 AM.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Apr 2003
    Location
    Mansfield, Texas, USA
    Posts
    2,462

    Cool

    This is interesting on 3-4 packs

    http://www.specialtytrans.com/specialty/700-3-4.htm
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  3. #3
    Join Date
    Nov 2003
    Location
    Denton Texas
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    The last update on that was May 30, 2001. I wonder if that is still how they do it.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
    Join Date
    Apr 2003
    Location
    Mansfield, Texas, USA
    Posts
    2,462

    Cool

    I'm tryin to see how feasible it will be to modify an input drum to accept TH400 direct clutches.

    From my Alto book, it shows that the 80E clutch is 0.151" larger in OD than the 60E one. ~5/32" only. From the pictures I've seen of built input drums it looks like there is enough room to machine out the drum slightly for this larger clutch.

    5.893 - clutch; 4.575 - steel. 80E
    5.742 - clutch; 4.995 - steel. 60E
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,689
    Check the internet, I saw somewhere a company was building larger diameter 3-4 input drums. It may have been simply machining them larger but I read about it on the internet somewhere.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Apr 2003
    Location
    Mansfield, Texas, USA
    Posts
    2,462

    Cool

    Hrm, I'll look around. Let me know if you come up with anythin... I'm going to see how far I can take a 60E



    www.api-racing.com apparently they can do it. I'll email today. They do, $600 to hold eight TH400 clutches.
    Last edited by Hit Man X; 07-19-2007 at 07:24 PM.
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
    '80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL

    Let's face it, the red hair... makes 'em wet.


  7. #7
    Join Date
    Feb 2008
    Location
    Surprise, AZ
    Posts
    33
    which 4th servo is better sonnax or superior
    05 Chevy 5.3, stock 3.73 gears, aem brute force, pacesetter LTs, ORY, custom magnaflow exhaust w/ camaro tips, diablo predator, msd wires, mcgaughys 2/4 drop, memphis audio throughout. Waiting to be installed: trans-go kit, servos

  8. #8
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,396
    I've heard alot about superior and how well they work.
    1951 3100
    1984 C10

  9. #9
    Join Date
    Jan 2008
    Location
    mass.
    Posts
    7
    you cant shift into od at wot with a aftermarket 4 gear servo
    intake,true dual,vette servo,410,g80,

  10. #10
    Join Date
    Feb 2008
    Location
    Surprise, AZ
    Posts
    33
    so will the truck just stay in 3rd until i get out of WOT
    05 Chevy 5.3, stock 3.73 gears, aem brute force, pacesetter LTs, ORY, custom magnaflow exhaust w/ camaro tips, diablo predator, msd wires, mcgaughys 2/4 drop, memphis audio throughout. Waiting to be installed: trans-go kit, servos

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