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  1. #1
    Jr. Apprentice bobby's Avatar
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    Aug 2006
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    NorCal
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    Red face rebuilt my first 4L80E !!!!

    Happy Thanks Giving Every one! Sold my last chevy pick up. I had to rebuild my Suburban 4l80e wich was much easier than the last 700r4 . I rebuilt it for under 500 dollars . replaced everything . I purchased an ATSG book and then went to work. i replaced all solenoids everything electrical in valve body. When i finished and installed it ran it and It would not shift right WOULD NOT go past 30mph and was reving at 4000rpms,somehow it felt heavy. I pulled codes and it had none. I built a signal tester because I had no way of knowing if the ECU was sending ground signal to shift solenoids.(no tech 1 for me ).here is the link http://www.atraonline.com/manuals/ge...v/tetdv-c2.htm
    everything shifted properly I mean I could see the ecu turning the shift solenoids on according to shift truth table.
    After a night of dreading to have to pull tranny off again ,I went to my friends house to ask for his real Chevy service manual. I explained everything to him As far as what the transmission was doing, and he looked at me and asked if my Burban was 4x4. I said yeah ,and right then ,right then I knew what the problem was. LOL , My transfer case select lever was engaged in 4x4 low setting!!!! I felt so relieved and dumb at the same time ,turns out when i hooked up transfer case linkage under the truck ,I had set it in the low setting. when i pulled the tranny out it was in the high 2wd setting so that never even dawned on me.I was overlooking the ovious and preparing to buy a new ecu.Lesson learned, Drives perfect now.

  2. #2

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    Hahaha good story! But glad it turned out so well! What horse is that tranny rated at now?

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  3. #3
    Jr. Apprentice bobby's Avatar
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    Quote Originally Posted by ntbush83 View Post
    Hahaha good story! But glad it turned out so well! What horse is that tranny rated at now?
    It was a simple rebuild , Burban is a 1994 2500 3/4 ton with 454motor.

  4. #4

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    Sometimes it the simple things!

  5. #5

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    congrats on the rebuild and figuring out the problem
    David
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    http://www.gmtruckclub.com/forum/sho...Silverado-2500
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  6. #6
    Legend Bigbomber's Avatar
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    Feb 2010
    Location
    Winnipeg,Manitoba,Canada
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    5,089

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    Congratulations on your succesful rebuild!
    [/SIGPIC]2009 Chevy Silverado LT 1500 EXT CAB 4X4 Vortec 4.8L SFI,K&N air filter,Weathertech Floor Liners ,Weathertech Stone/Bug Deflector, Line X Spray On Bedliner, TruXport Rollup Tonneau Cover, Molded Mudguards, Viper 5701 LE 2 way Security Alarm/Remote Starter, Xm Satelite Radio,BILSTEIN 5100 rear shocks,BILSTEIN 5100 front levelling shocks,READYLIFT 2" rear lift blocks,Goodyear Wrangler Territorys -265/70R 17"

  7. #7
    Jr. Apprentice bobby's Avatar
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    after searching on the web I found this useful link its contains alot of good info. http://www.atraonline.com/manuals/ge.../tetdv-c3i.htm If you scroll to the bottom of page and click table of contents . You will find info on how to pull OBD1 codes for GM and Ford , wiring info as well as other GM and Ford transmissions types. The signal checker I built saved me from having to drain and remove tranny oil pan. Its a cheap and very effective way of checking solenoid shift patterns including TCC engagement. I hope this helps some , trouble shooting their 4l60 or 4l80e.

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