1993 corvette
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8th Gear
Joined: Jun 2025
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Melting Slicks
Joined: Feb 2003
Posts: 2,661
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From: Saskatoon Sask.
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Safety Car
Joined: Mar 2017
Posts: 4,189
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From: LeClaire Iowa
If you are asking this question you are not qualified to rebuild this transmission. Either take it to a local shop or shop online. Dan edit: I am not qualified either.
Last edited by Whaleman; Jun 29, 2025 at 09:24 AM.
Burning Brakes
Joined: Nov 2004
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I build 4L60E GMs for a tranny shop...
sounds like the FORWARD clutches or 3rd/4th clutches (or both) could be smoked and stuck together, forcing them to be "on" all the time.
If you drop the pan, and you see a black sticky icky mess... it is probably those clutches.
If you just have metal in the fluid and on the magnet, there is a chance it is a sprag/roller clutch issue.
Where are you located?
sounds like the FORWARD clutches or 3rd/4th clutches (or both) could be smoked and stuck together, forcing them to be "on" all the time.
If you drop the pan, and you see a black sticky icky mess... it is probably those clutches.
If you just have metal in the fluid and on the magnet, there is a chance it is a sprag/roller clutch issue.
Where are you located?
Last edited by 500hp; Jun 30, 2025 at 12:56 AM.
Melting Slicks
Joined: Feb 2003
Posts: 2,661
Likes: 806
From: Saskatoon Sask.
I build 4L60E GMs for a tranny shop...
sounds like the FORWARD clutches or 3rd/4th clutches (or both) could be smoked and stuck together, forcing them to be "on" all the time.
If you drop the pan, and you see a black sticky icky mess... it is probably those clutches.
If you just have metal in the fluid and on the magnet, there is a chance it is a sprag/roller clutch issue.
Where are you located?
sounds like the FORWARD clutches or 3rd/4th clutches (or both) could be smoked and stuck together, forcing them to be "on" all the time.
If you drop the pan, and you see a black sticky icky mess... it is probably those clutches.
If you just have metal in the fluid and on the magnet, there is a chance it is a sprag/roller clutch issue.
Where are you located?
That is what I had thought too but the OP has given such limited information to describe the conditions more adequately that I did not pursue it any longer. The only thing in this scenario that I question is he said he also gets "drive" when he selects reverse. If the forward/3-4 clutches are welded, he should get a total bind when the reverse input clutch comes on. I am thinking he has destroyed a hard part somewhere in the train. A destroyed rear planet would cause this.
Last edited by arbee; Jun 30, 2025 at 08:17 AM.
Thread Starter
8th Gear
Joined: Jun 2025
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At first it started grinding a little but once it got up to speed it acted completely fine then parked it for an hour then reverse started acting like it was parked and wouldn’t go into neural.so I just figured I’d learn to rebuild the trans myself because I can’t afford a big bill for it.
Melting Slicks
Joined: Feb 2003
Posts: 2,661
Likes: 806
From: Saskatoon Sask.
At first it started grinding a little but once it got up to speed it acted completely fine then parked it for an hour then reverse started acting like it was parked and wouldn’t go into neural.so I just figured I’d learn to rebuild the trans myself because I can’t afford a big bill for it.
Thread Starter
8th Gear
Joined: Jun 2025
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I have been watching the videos on the tear downs to me it seems pretty straightforward to me and I’ll get the manual for it
Safety Car
Joined: Mar 2017
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From: LeClaire Iowa