Erratic violent CLUNK around 48 to 52MPH 3-4 shift
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TECH Fanatic
Joined: Jul 2022
Posts: 1,042
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From: Alaska
Erratic violent CLUNK around 48 to 52MPH 3-4 shift "ECM] 400 - TCC Lock During Shift: When enabled, the VCM will allow the TCC to remain locked during shifts in an automatic transmission fitted vehicle."
TCC Locked during shifts: Enable or Disable ?
Getting an occasional nasty CLUNK at light throttle 3-4 shift, very fresh install of 4L80 with CircleD triple disc spec'd stall 2600-2800.
Just ran through the BlueCat tune file, tried to integrate in HPTuners, bumped the Lock/Unlock spreads out by 2mph.
What say the crew: Recommmend DISABLE ECM400 TCC LOCK ?
TCC Locked during shifts: Enable or Disable ?
Getting an occasional nasty CLUNK at light throttle 3-4 shift, very fresh install of 4L80 with CircleD triple disc spec'd stall 2600-2800.
Just ran through the BlueCat tune file, tried to integrate in HPTuners, bumped the Lock/Unlock spreads out by 2mph.
What say the crew: Recommmend DISABLE ECM400 TCC LOCK ?
