986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Input and Output Shaft Seals -- grease or not?

geekdaddy · 05-12-2020, 02:32 PM

Thanks for the feedback. tonythetiger: I think you're referring to the drive shafts at the wheel hub?

I'm referring to the input shaft seal which surrounds the transmission input shaft (that connects to the engine flywheel) and keeps the transmission fluid from leaking out of the shaft bearings into the bell housing -- which is what I think mine was doing. Here's a pic of it:https://cdn4.pelicanparts.com/techarticles/Boxster_Tech/44-TRANS-Clutch/images_med/Pic05.jpg

....and here is a photo of the output shaft seals. These are the seals that surround the splined drive shafts on either side of the transmission: https://cdn4.pelicanparts.com/techarticles/Boxster_Tech/39-TRANS-LSD/images_med/Pic03.jpg

Based on what 911monty shared, it sounds like the inside of the hollow seal should be filled with grease(bearing?). Doesn't mention the inside surface which seals the shaft and sits on the shaft surface that is spinning. Gilles recommends clean (trans) oil on this surface which makes sense to me but the manual shared by 911monty doesn't mention it.

05-12-2020, 02:32 PM	#6
geekdaddy Registered User Join Date: Oct 2018 Location: New England Posts: 58	Thanks for the feedback. tonythetiger: I think you're referring to the drive shafts at the wheel hub? I'm referring to the input shaft seal which surrounds the transmission input shaft (that connects to the engine flywheel) and keeps the transmission fluid from leaking out of the shaft bearings into the bell housing -- which is what I think mine was doing. Here's a pic of it:https://cdn4.pelicanparts.com/techarticles/Boxster_Tech/44-TRANS-Clutch/images_med/Pic05.jpg ....and here is a photo of the output shaft seals. These are the seals that surround the splined drive shafts on either side of the transmission: https://cdn4.pelicanparts.com/techarticles/Boxster_Tech/39-TRANS-LSD/images_med/Pic03.jpg Based on what 911monty shared, it sounds like the inside of the hollow seal should be filled with grease(bearing?). Doesn't mention the inside surface which seals the shaft and sits on the shaft surface that is spinning. Gilles recommends clean (trans) oil on this surface which makes sense to me but the manual shared by 911monty doesn't mention it.