4L80e - low RPM vibration when converter is locked up
#1
4L80e - low RPM vibration when converter is locked up
I need a little help . . . I recently had a local guy rebuild my 4L80e after completely killing the 2nd gear clutches. It would still hold under light load, but if it was given any mild to hard throttle, it would slip.
Before I killed 2nd gear, every once in a while, the truck would free spin, or slip when given throttle from a dead stop, or from a slow roll from a stop sign.
Now after the rebuild . . .
Trans was rebuilt with Raybestos clutches, steels, new wave plate, TransGo HD2 kit, and a new forward drum. Everything else looked spotless. I also added a smaller than stock multi-disk Circle D 3,000 converter. (kinda loose, not the best for towing)
After the rebuild I now have a low RPM vibration when the converter is locked up. If I'm in 4th, and locked up, going 80mph or more, it's very smooth . . . no issues.
If I'm locked in 4th from 62-75 . . . there's a very noticeable vibration, pretty much shakes the truck when there's a blow out.
If I'm locked in 3rd gear, it does vibrate some, but nothing near as bad as it does in 4th. . . .
Do I need to do the TransGo 48-ACT-TL kit ? . . . truck had 140K miles on it when it was rebuilt.
Before I killed 2nd gear, every once in a while, the truck would free spin, or slip when given throttle from a dead stop, or from a slow roll from a stop sign.
Now after the rebuild . . .
Trans was rebuilt with Raybestos clutches, steels, new wave plate, TransGo HD2 kit, and a new forward drum. Everything else looked spotless. I also added a smaller than stock multi-disk Circle D 3,000 converter. (kinda loose, not the best for towing)
After the rebuild I now have a low RPM vibration when the converter is locked up. If I'm in 4th, and locked up, going 80mph or more, it's very smooth . . . no issues.
If I'm locked in 4th from 62-75 . . . there's a very noticeable vibration, pretty much shakes the truck when there's a blow out.
If I'm locked in 3rd gear, it does vibrate some, but nothing near as bad as it does in 4th. . . .
Do I need to do the TransGo 48-ACT-TL kit ? . . . truck had 140K miles on it when it was rebuilt.