C1 4spd trans fluid leak

[Joe L.]

Re: C1 4spd trans fluid leak

Bruce, it's possible. It's been 10 plus years since I put fluid in it (after installing another engine for driving). Most likely I would have filled it to the bottom of the filler hole,( but when the transmission and engine were removed together, the clutch, had oil/grease on the pressure plate side), but that's not to say the previous owner had not done the same thing with fluid top off. Just wondering how long it would take to leak out enough fluid to get it down to the point where it wouldn't leak out in this area. (Please no smart answers about till it runs out of fluid or locks up)

Al------


Sometimes, after long service, the counter shaft bore in the front of the case will become "elongated" or "egg-shaped". When this occurs, a leak will occur. The only positive and durable way to address this is to have the case bushed. This is difficult because the amount of material between the counter shaft bore and the front bearing bore is quite small. However, there are a few guys that have become adept at doing this. I'm not saying this is the source of the leak problem but it could be the source of the problem.

[Al R.]

Re: C1 4spd trans fluid leak

Joe, I'll look at this and see if I see anything out of the ordinary. Any recommendations on who would be best to contact on this if needed?

[Bruce B.]

Re: C1 4spd trans fluid leak

Al,
If the temperature is not to cool, like below 70 degrees the fluid could leak out in a day or 2, quicker if you drive the car.

If that is where it is leaking it is possible to smear a dab of silicone RTV (clean everything with lacquer thinner before applying silicone)over the shaft and around the edge of it and it can stop or slow down the leak.
Bolt the trans in place on the bellhousing before the silicone cures.

But the best fix is as described by Joe L. in the previous post.

[Al R.]

Re: C1 4spd trans fluid leak

Bruce, I figured it should have leaked down enough over the 10 plus year period. I'll check what Joe talked about and see. I'd rather spend the money while it's out then have to do it again later. I'm slowing down too much in years.

[William C.]

Re: C1 4spd trans fluid leak

Al, the problem with the case and countershaft is primarily an aluminum case issue, never found an issue with a T-10 and iron case in that area, still worth checking, but I think the overfill is your best analysis.

[Al R.]

Re: C1 4spd trans fluid leak

Thanks all for the suggestions. Al

[Cecil L.]

Re: C1 4spd trans fluid leak

In late 59 or 60, they lowered the filler -plug to resolve the overfilling issue. It was no longer necessary to fill below the hole. As I recall, it went with the change to the 1B case, or was it the 1A?.

[Joe L.]

Re: C1 4spd trans fluid leak

Joe, I'll look at this and see if I see anything out of the ordinary. Any recommendations on who would be best to contact on this if needed?

Al-----

Distortion of the counter shaft bore will be hard to detect by visual inspection with the transmission assembled. The guy to contact for information on a repair if you need it would be Larry Fischer at D&L Transmissions.