4L60E 04 gto
Thread Starter
Teching In
Joined: Feb 2015
Posts: 4
Likes: 0
4L60E 04 gto I just had my trans completely rebuilt. new clutchs and converter. before it was making a screeching noise at wot when shifting.. I broke the freshly rebuilt trans in for a few hundred miles and did a pull to find out that it is still doing the same thing as before. its only at 58k miles. any help would be awesome.
TECH Fanatic
Joined: Jan 2015
Posts: 1,114
Likes: 33
From: Fort Worth, Texas
I just had my trans completely rebuilt. new clutchs and converter. before it was making a screeching noise at wot when shifting.. I broke the freshly rebuilt trans in for a few hundred miles and did a pull to find out that it is still doing the same thing as before. its only at 58k miles. any help would be awesome.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Shifts cause a sudden change in engine RPM; the accessories such as alternator, PS pump, water pump have momentum and resist the change in RPM and can cause the serpentine belt to slip causing the screech. Try a new quality belt (Goodyear, Yates; skip the cheap no-brand belts.)
To diagnose many trans problem it is very useful to connect a pressure gauge, drive around with it and reports its readings. Even just the readings in Park, Reverse and Drive are very useful.
To diagnose many trans problem it is very useful to connect a pressure gauge, drive around with it and reports its readings. Even just the readings in Park, Reverse and Drive are very useful.
Thread Starter
Teching In
Joined: Feb 2015
Posts: 4
Likes: 0
Shifts cause a sudden change in engine RPM; the accessories such as alternator, PS pump, water pump have momentum and resist the change in RPM and can cause the serpentine belt to slip causing the screech. Try a new quality belt (Goodyear, Yates; skip the cheap no-brand belts.)
To diagnose many trans problem it is very useful to connect a pressure gauge, drive around with it and reports its readings. Even just the readings in Park, Reverse and Drive are very useful.
To diagnose many trans problem it is very useful to connect a pressure gauge, drive around with it and reports its readings. Even just the readings in Park, Reverse and Drive are very useful.
