HerpDerp1919
I'm Awesome
2000 Chev K2500 5.7/4L80E/4x4 with 263k on the clock.
After driving my truck for its longest trip so far, about an hour, it developed an issue that when the my 4L80e is cold, it will shift and work perfectly fine. However, after about 20 minutes of driving, it will drop out of overdrive. The transmission will still shift smooth, no jarring or hard shifts. It just kinda slips out of OD. I have done some research and read that it could be a TPS or a faulty brake switch not allowing TC to lock up. My question is, if it was either of those two parts, would that not also happen when its cold? I'm really leaning towards it may be the clutches in the TC are shot. I'm just curious if I might be on the right track with things. It's been brutally hot here in S. Texas so its been a minute since I've been near the truck so just trying to get into things now that its cooling down. Thanks in advance for any suggestions!
After driving my truck for its longest trip so far, about an hour, it developed an issue that when the my 4L80e is cold, it will shift and work perfectly fine. However, after about 20 minutes of driving, it will drop out of overdrive. The transmission will still shift smooth, no jarring or hard shifts. It just kinda slips out of OD. I have done some research and read that it could be a TPS or a faulty brake switch not allowing TC to lock up. My question is, if it was either of those two parts, would that not also happen when its cold? I'm really leaning towards it may be the clutches in the TC are shot. I'm just curious if I might be on the right track with things. It's been brutally hot here in S. Texas so its been a minute since I've been near the truck so just trying to get into things now that its cooling down. Thanks in advance for any suggestions!