+ Reply to Thread
Results 1 to 6 of 6

Thread: Tranny Shifting wierd (4l80e)

  1. #1
    Join Date
    Jun 2009
    Location
    Caledonia, MI
    Posts
    322

    Tranny Shifting wierd (4l80e)

    Been putting a lot of miles on the truck latley, LOVE IT! I have noticed an issue with the trans though.

    When I start it up and drive it for the first time each day, it acts like it doesnt want to shift out of 1st. Its not slipping, its just acting like it doesn't want to shift at the reg RPMS...instead it shifts around 3-4k and then from there on it shifts fine. Like even if I stop at a stop light, it will shift regularly after that. Its just the first initial shift for driving the truck each day. It does have a Nelson Tune and they have the shifts firmed up I am not sure if that matters.

    And also, if I shut the truck off after driving fora bit and let it sit, it wont wanna shift out of first but once it does everything is fine and like I said every shift is fine after that whether its from a stop sign or not. Ideas? Fluid is good.
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

  2. #2
    I think you run on cold shift point until the trans reach its normal operating temperature... Can someone confirm this? According to the nice schematic Redhearbeat post on your thread, the trans have a temperature sensor built in.http://www.ls1truck.com/forums/lsx-t...-build-16.html
    Sorry for my bad English I'm french!

  3. #3
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    They have a temp but there is no cold shift table.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  4. #4
    Join Date
    Jun 2009
    Location
    Caledonia, MI
    Posts
    322
    Ok what about this: When It doesnt want to shift out of first when I first drive it, I manually put the column shifter in 2nd and it will shift right there and then. But when I manually put the shifter on "D" again it will downshift back into first
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

  5. #5
    Join Date
    Jan 2011
    Location
    Mcalester,okla.
    Posts
    570
    Upshift sylonoid my b getting weak

  6. #6
    Join Date
    Jun 2009
    Location
    Caledonia, MI
    Posts
    322
    Quote Originally Posted by LQ9_Z71 View Post
    Upshift sylonoid my b getting weak
    How easy is that to do. Trannys r the only thing I don't really kno about.

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts