700R4 binding/resistance?
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,488
Likes: 4
From: Frostburg MD
700R4 binding/resistance?
I've been having a problem with my '89 and have traced it back to the transmission. http://forums.corvetteforum.com/c4-t...-friction.html
After pulling the driveshaft, I have noticed excessive friction when trying to turn the transmission yoke by hand, it it not too bad turning it counterclock when viewed from the rear, the direction the car normally travels, but it is very hard to turn it clockwise. Trans is completely stock, nothing has ever been done to it except for changing the speedometer driven gear about 2 yrs ago because of a gear change. Has 48k miles on it. Is it possible there is a band hanging up in in somewhere or something like that, the FSM doesn't seem to address this problem. Is this something that can be fixed without a rebuild, it works fine otherwise, it just causes a tremendous amount of rolling resistance, especially rolling in reverse.
After pulling the driveshaft, I have noticed excessive friction when trying to turn the transmission yoke by hand, it it not too bad turning it counterclock when viewed from the rear, the direction the car normally travels, but it is very hard to turn it clockwise. Trans is completely stock, nothing has ever been done to it except for changing the speedometer driven gear about 2 yrs ago because of a gear change. Has 48k miles on it. Is it possible there is a band hanging up in in somewhere or something like that, the FSM doesn't seem to address this problem. Is this something that can be fixed without a rebuild, it works fine otherwise, it just causes a tremendous amount of rolling resistance, especially rolling in reverse.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
I've been having a problem with my '89 and have traced it back to the transmission. http://forums.corvetteforum.com/c4-t...-friction.html
After pulling the driveshaft, I have noticed excessive friction when trying to turn the transmission yoke by hand, it it not too bad turning it counterclock when viewed from the rear, the direction the car normally travels, but it is very hard to turn it clockwise. Trans is completely stock, nothing has ever been done to it except for changing the speedometer driven gear about 2 yrs ago because of a gear change. Has 48k miles on it. Is it possible there is a band hanging up in in somewhere or something like that, the FSM doesn't seem to address this problem. Is this something that can be fixed without a rebuild, it works fine otherwise, it just causes a tremendous amount of rolling resistance, especially rolling in reverse.
After pulling the driveshaft, I have noticed excessive friction when trying to turn the transmission yoke by hand, it it not too bad turning it counterclock when viewed from the rear, the direction the car normally travels, but it is very hard to turn it clockwise. Trans is completely stock, nothing has ever been done to it except for changing the speedometer driven gear about 2 yrs ago because of a gear change. Has 48k miles on it. Is it possible there is a band hanging up in in somewhere or something like that, the FSM doesn't seem to address this problem. Is this something that can be fixed without a rebuild, it works fine otherwise, it just causes a tremendous amount of rolling resistance, especially rolling in reverse.
If you are concerned that something is "hanging up" in the trans, total disassembly is the only way to inspect.
It is doubtful though. When things hang up in an auto trans, they bind. When they bind, they grenade. An auto trans is a planetary gearset(s) manipulated by hydraulic clutchpacks or bands. As mentioned, planetary's dont drag, or hang up, but clutchpacks/bands can. They burn up almost immediately after though.
