4R70W expertise required
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4R70W expertise required
I have a 1999 4R70W transmission that is being installed into a 1976 bronco behind a 302 V8. After installing it and getting all the mounts, electronics installed, the unit was road tested. It went 4 miles and won't go any more. The fluid smells lightly burned, somewhat dark. I know transmissions but I am not an expert.
My concern and possible cause is the output shaft. The shaft is from advance adapters. The transmission builder put it in. Upon removal I notice that the last of the three sealing rings on the shaft and the groove between it and the middle sealing ring is hanging out in space. There is a counterbored hole in the groove that has a maybe 1/32 inch hole to what I belive is main pressure.
Does anyone know or can verify that that sealing ring should indeed be inside of the transmission? If so would there be a spacer or something in backwards order that could allow the shaft to extend out the rear too far. Or is it a shaft problem?
Thanks
My concern and possible cause is the output shaft. The shaft is from advance adapters. The transmission builder put it in. Upon removal I notice that the last of the three sealing rings on the shaft and the groove between it and the middle sealing ring is hanging out in space. There is a counterbored hole in the groove that has a maybe 1/32 inch hole to what I belive is main pressure.
Does anyone know or can verify that that sealing ring should indeed be inside of the transmission? If so would there be a spacer or something in backwards order that could allow the shaft to extend out the rear too far. Or is it a shaft problem?
Thanks
Last edited by Mustangjoe; Aug 8, 2006 at 04:11 PM.
Senior Member
Joined: Jul 2004
Posts: 1,380
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From: cincinnati
I have no experience with the output shaft in question I would have to say you need to compare it to a stock one on the proper end.
Alan
Alan
Originally Posted by Mustangjoe
I have a 1999 4R70W transmission that is being installed into a 1976 bronco behind a 302 V8. After installing it and getting all the mounts, electronics installed, the unit was road tested. It went 4 miles and won't go any more. The fluid smells lightly burned, somewhat dark. I know transmissions but I am not an expert.
My concern and possible cause is the output shaft. The shaft is from advance adapters. The transmission builder put it in. Upon removal I notice that the last of the three sealing rings on the shaft and the groove between it and the middle sealing ring is hanging out in space. There is a counterbored hole in the groove that has a maybe 1/32 inch hole to what I belive is main pressure.
Does anyone know or can verify that that sealing ring should indeed be inside of the transmission? If so would there be a spacer or something in backwards order that could allow the shaft to extend out the rear too far. Or is it a shaft problem?
Thanks
My concern and possible cause is the output shaft. The shaft is from advance adapters. The transmission builder put it in. Upon removal I notice that the last of the three sealing rings on the shaft and the groove between it and the middle sealing ring is hanging out in space. There is a counterbored hole in the groove that has a maybe 1/32 inch hole to what I belive is main pressure.
Does anyone know or can verify that that sealing ring should indeed be inside of the transmission? If so would there be a spacer or something in backwards order that could allow the shaft to extend out the rear too far. Or is it a shaft problem?
Thanks