Ok My idea was the assemble the clutch pack first and then the pumpkin. I also see in my pumpkin those slots are open ?? So i can block the clutch pack from outside. Image Unavailable, Please Login
I don't know what you bought but here are my viton seals. Notice how easy I can compress them? they slip right over the shaft without any craziness. Image Unavailable, Please Login
Very strange, but they are in. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Guys, I take it the closed side of the seal goes facing the gearbox and the open towards the pumpkin, the Ferrari ones are solid without an open side?
No other way around the !Lip! Should face towards front of car. Or open side as you call it. Oil should push against the open section or oil seal lip
Sheesh. I have a set of the (oem ?) seals PN 137249 from Ricambi. I had planned on replacing these as a "while you're in there" activity when I pull the pumpkin to evaluate the TOB. Based on this thread I'm guessing the consensus is moving toward Viton as the go-to seal? Just went to look at the seals Ricambi sent, and they appear to be PTFE, and would see very limited compression; this must have been chosen for friction properties above sealing...or who knows what Ferrari was thinking. Either way, a dab of coupling grease here may assist the lackluster design. Going to bounce this seal off our reliability engineer and our John Crane site engineer and get their input. I'll start a new thread on it, unless someone has already investigated and beat this to death.....or the problem is solved with the Viton seal; although I'm guessing life is short for those seals in this application, and a combination of PTFE/Viton may yield the best results. Does anyone have pictures of the leaking seals? Do they look failed/worn/misshapen at all?
I had failed seals, and they just looked scuffed. I replaced with stock, and it was a bear, but so far, so good.. I may take it apart and inspect when I pull the engine. sjd
Yes. I've changed them, 500 miles ago. There's 2 way to tell if its leaking. 1. Pull it apart and look for trans fluid around the splines where patrick saw his. 2. wait for it to blow through all the grease in the flywheel. There's no leaking anything now, so it's probably fine. (unless they're really like British cars and that just means you're out of whatever oil you expect to see on the floor) sjd
That seems to be the norm. My reason for asking about inspection was purely to assess the failure mechanism (if any).
The oem seals I ordered appear to be PTFE, so not sure what they mean by "redesigned," unless its an oem redesign with current PTFE seals superseding another seal of different material. Also, the note about the use of PTFE allowing them to stretch and shrink back doesn't make sense.
