Quote:
Originally Posted by davepl
I have what appears to be a "two drip a day" transmission leak. It is coming out of the U-joint at the back of the trans.
The trans and the trans seal are dry. I thought perhaps it was just grease I packed into it during assembly coming out (red grease, red trans fluid, hard to say). But it's been doing it for a couple of weeks now and I don't think there's enough supply in a U-joint cap to account for it.
I switched over to the big (1330 or 1350?) yoke, as it is a 200-4R and wanted to retain my driveshaft.
If not through the yoke, is there anywhere else I can check?
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Yes, it can leak through the yoke even if there is no weep hole. Due to machining of the internal splines in the yoke, it has to be open on both ends during the process. There is a plug in the rear similar to a freeze plug that can sometimes leak on the outer edges. I have fixed them before with JB weld, only to have them start leaking again later necessitating a replacement yoke, and coincidently those were on 200R4s in Cadillacs back in the 80s.
I'd clean it as good as possible and silver solder it like a water pipe. Never tried that before, I just now made it up so can't say I've done it but I have silver soldered many, many high pressure diesel injection lines (up to 2800 lbs psi) and that stuff is quite dependable just make sure you flux it good first.
You might get it mig or tig welded as well. Otherwise, replace the yoke.