66BB manual transmission leak

[Leonard Gionet]

I have an aggressive oil leak between the transmission and the bell housing and it doesn't seem to affect the performance of the clutch-no chatter. The leak is probably not caused because of lack of use because I drive the car a few times per month. I have been told that this is a common problem; however I would like to try to fix the problem. Any ideas? Thank you.

[Craig S.]

Re: 66BB manual transmission leak

Leonard - two areas come to mind, the throwout bearing support asm that bolts to the transmission could be leaking between the flange and the transmission case, and the other common are is the bore for the countershaft wears and causes a leak. This can be corrected by bushing the case to remove the play, but this does require removal and disassembly of the transmission....Craig

[Larry S.]

Re: 66BB manual transmission leak

I had chased an oil leak from the same area for about 6 months.It made me crazy.Finally I got tired of removing the trans and reinstalling So I sent it to Ed hartnet in penn and had it rebuilt.Check the archive on this around 2002 prior to august I was given excellent advice that should have solved my problem.I just got tired of removing my trans and started to think with all the labor I had in pulling the trans it would of been cheaper,easer,less frustating if I would have had it rebuilt the first time it was out.

JUST SAY NO TO OIL LEAKS.

mine is finally leak free.

If the leak is coming from inbetween the bell housing and the transmition a temporay repair may be to put sealent on that shaft.You have to remove the bellhousing to get at it.allthought mine was not leaking there the shafte was peened in with a couple of shots from a punch.when the tranney was rebuilt the case was rebushed.

[Craig S.]

Re: 66BB manual transmission leak

Absoulely agree that Ed is a great guy to go for this.....he taught a class at Bloomington a few years back on rebuilding them, and the shaft is the common leak point. To fix it correctly, if worn, this is the only way to go. He is a great guy, and I would trust him working on my tranny.....Craig