Tommyv8

iTrader: (8)

Last year I replaced my steel driveshaft with a low mileage aluminum one from a 6-speed LS1 Camaro into my car and it fit and worked great, no leaks or any other issues at all. Earlier this year I had my trans rebuilt. While it was there they also replaced the u-joints. When I got it back, there was fluid leaking from the output shaft. I took it back, they replaced the seal, and it still leaked. I took it back again, they replaced the seal again, leak is still there. They said that the driveshaft appears to be too short, that not enough length of yoke is going into the trans. This shaft worked fine and didn't leak a drop until the tranny shop got a hold of it; now there is fluid in my driveway and on the underside of my car. What could be going on here?

twitchtwice

iTrader: (12)

interesting, im sure someone will chime in and let you know if the m6 ds is shorter, im not sure if it is but i know someone will know.

Tommyv8

iTrader: (8)

Wow, looks like I stumped the band. Guess I'll have to have a shop look at it.

ChevPower

iTrader: (8)

It may be leaking out the center of the yoke, At the end of the spline there is a cap to keep fluid from leaking out of the yoke, Some times people push the drive shaft to hard into the trans and the output shaft hits the cap pushing it out causing it to leak fluid out the end of the shaft.

Tommyv8

iTrader: (8)

I'll pull the shaft and look at the yoke a little more closely, thanks.

ChevPower

iTrader: (8)

You can jack the car up in the front only leaving the rear on the ground and see if it leaks.

spy2520

iTrader: (3)

isnt there a brass bushing in there at the back of the trans that can wear out and leak?

FLT

iTrader: (1)

There is a bushing however the unit was just rebuilt. One would think that the bushing was addressed during the overhaul. I would agree with the above advise on the plug in the yoke.

Take a look at the housing to check for cracks. Also there is a possibility that the builder rolled or forgot to install the seal between the main case and the extension housing. Just a couple more ideas. Vince B