MC tranny

(3star) · (3star) **Join Date: Jan 2007** 05-21-2007, 7:58 PM

My transmission coupling is leaking fluid where the shaft meets with the tranny. Has anyone had this problem? Can I fix it myself or is it going to be really expensive. Any advice will help.

(litlone873) · (litlone873) **Join Date: Jan 2005** 05-21-2007, 10:42 PM

Ohhhh "MasterCraft Transmission"... I thought this was a new thing, "McTranny"... ya know, like McDreamy and McSteamy... My bad.

(whitlock87) · (whitlock87) **Join Date: Feb 2005** 05-21-2007, 10:50 PM

Should just be the shaft seal.
about a $10 part

(3star) · (3star) **Join Date: Jan 2007** 05-22-2007, 4:05 AM

david
is a shaft seal hard to put in or is it fairly simple? Hopefully that is the problem, i need to get out on the lake. thanks

(mkperceptions) · (mkperceptions) **Join Date: Jan 2007** 05-25-2007, 8:30 PM

shaft seal is easy is it Direct drive or v drive. I find the direct drives are easier to do.

(snyper1d) · (snyper1d) **Join Date: Mar 2005** 05-26-2007, 6:25 AM

If its the V-Drive, more than likely be more than a seal. If you are leaking fluid, there is probably pitting in the transmission output shaft.

V-drive: I am not sure what year boat you have, but if it is an late 90's-early 2000's V-Drive then you would definately benefit from doing a complete service (both front and rear seals). These year boats only used single-lip seals and are able to pull water into the transmission when it is running. Go ahead and install the double-lip seals. As I said the pitting on your shaft will require a speedy sleeve which will give the seal a smooth surface to work on. This process requres a transmission pull, and somewhat labor intensive, but it's the best route.

Whether it is a V-drive or direct drive, you need to look at your sealing surfaces. There is a reason why there is a leak.

(dizzyj) · (dizzyj) **Join Date: Jul 2003** 05-29-2007, 8:44 AM

if the shaft is pitted, you can install a speedy sleave. Not much harder than a seal.