ObfuscatedV

iTrader: (1)

Ill get pictures if needed, but dont have them saved on my phone, so I think a description may be enough to help diagnose. I can get pictures if needed. My T56 appears to have a slow, small leak around/near the back of the tailhousing. It shows noticeably less when sitting. However after driving, you can notice small pea-sized drops on the ground. Also, right around the general area where its leaking (about where the exhaust splits off into the Y-pipe), it looks to have "splattered" on the exhaust piping, so I'd guess its leaking onto the driveshaft. Could it be a worn driveshaft bushing thats causing a tailshaft seal to leak? Being a T56, I'm sure plenty on here could shed some light, and for any additional things to check. Thanks in advance!

BigDB

Check the vent tube to make sure its not kinked or clogged, that could be why it leaks when in use and not when in use. A pic might help as far as determining if its a tail shaft seal ect.

BALLSS

without a pic, guess is its the rear seal. That can be changed without droping trans. you do need to drop drive shaft and maybe x member if it is in the way. I have a B-body stick, not f-body so don't know how your x member runs in relationship to the rear of the tranny. Mine is not a issue.

if it is the rear seal most likely DS yoke is slinging fluid around.

pic would help

ObfuscatedV

iTrader: (1)

Thanks for the help guys, and my apologies for not getting a picture. I will try to get one in the next two days, but will likely need to get it outside and drive it for a few minutes to reproduce the issue. We have been hit pretty hard with snow and ice here in KY, so Ill try to get one when it clears up a bit and I can get the car out of the garage. Thanks!

ObfuscatedV

iTrader: (1)

Vent tube looks fine. Thinking it's tailshaft seal?

jmd

iTrader: (4)

Sure looks like it. Nice work with the pics.

Your yoke has a nut that has some decent torque on it (leave it in 1st gear & get your 1/2 breaker out, prepare to hold the yoke too) and the yoke will need a puller in order to get to the seal. A simple (teflon) sealant at the mainshaft to yoke splines isn't a bad thing for the fixed yoke versions.

ObfuscatedV

iTrader: (1)

Thanks, and noted. I was hoping it was the seal instead of the alternatives. Shouldn't be too bad of a job

ObfuscatedV

iTrader: (1)

Bumping this before I tackle the job. I have a replacement rear output shaft seal, National brand, doesnt have dust boot. Apparently this fits a variety of transmissions, including auto? Looks like this...
http://images.oreillyauto.com/parts/...2s_p04_ang.jpg

Should I order one straight from GM instead?

Anything else I should check for while doing this?

Lift car, unbolt driveshaft, pull seal, put new seal in, bolt driveshaft back. Sound right?

Should I use any type of silicone lubricant when putting the new one in?

calhoon

iTrader: (6)

oil drips look quite dark for ATF. Sample oil / and fill to be sure the level and health are OK. A quality seal will not require any sealant to install. A seal installer is your friend, tho.