Dana44 Pinion Seal
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
It's no different than any another rear diff, other than the C beam needs removed and the back of the transmission will need to be supported. I expect there.is a YouTube video.
Team Owner
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
Reach out to this fellow who has recently done it in his car. There's snapshots in his thread regarding it and very dependent on your D44 you might want to check yours for it's build. If yours was maybe a very early rear axle ratio change you could have the same circumstance he ran into.
You're sure it's a pinion seal leaking?
https://www.corvetteforum.com/forums...-projects.html
You're sure it's a pinion seal leaking?
https://www.corvetteforum.com/forums...-projects.html
Thread Starter
Instructor
Joined: Jan 2022
Posts: 204
Likes: 65
From: Phoenix, AZ
Thanks for the replies. The oil is running back along the bottom of the diff. No worries about 4.10 gears. I will however take a very close look at the yoke when I get it out. This is a one year old rebuilt diff.
Safety Car
Joined: Oct 2007
Posts: 4,426
Likes: 229
From: Pennsylvania
I was convinced that my Dana 44 pinion seal was leaking too. But once I really examined it, it turned out to be the differential cover (bat wing) leaking. The pinion seal was bone dry. The oil was running and dripping from the bottom of the of the differential as yours is. It cost me north of $1400.00 to get that leaky gasket replaced. Lots of parts need to be removed to get that cover off. I hope yours is as simple as a pinion seal replacement.
Last edited by FOURSPEEDVETTE; Dec 8, 2023 at 11:25 PM. Reason: typo
Pro
Joined: Oct 2000
Posts: 749
Likes: 46
From: Estero, FL
I was convinced that my Dana 44 pinion seal was leaking too. But once I really examined it, it turned out to be the differential cover (bat wing) leaking. The pinion seal was bone dry. The oil was running and dripping from the bottom of the of the differential as yours is. It cost me north of $1400.00 to get that leaky gasket replaced. Lots of parts need to be removed to get that cover off. I hope yours is as simple as a pinion seal replacement.
Jay
Safety Car
Joined: Oct 2007
Posts: 4,426
Likes: 229
From: Pennsylvania
I probably could have gotten it done for about $600.00. But I opted to replace the differential "batwing" bushings, the half shaft universal joints, and the drive shaft universal joint changed too while he had everything apart. Those were all due to be replaced, so I went for it. I'm glad I did.
