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View Full Version : New 12 bolt pinion seal leaks

vstol
03-14-2020, 07:56 AM
While I was replacing the transmission and drive shaft I thought I would replace my rear pinion seal on my 12 bolt in my 72 Camaro. Well it leaks more now than when I replaced it, I will replace it again but what I'm I missing? It has been on the lift since I replaced it and it has not been out on the road does it need some road time to seal better??
Thanks
vstol
03-14-2020, 08:05 AM
I found this can anyone verify this

https://www.bing.com/videos/search?q=replacing+12+bolt+pinion+seal&view=detail&mid=DE92CDE42D0DE21174E7DE92CDE42D0DE21174E7&FORM=VIRE
vstol
03-15-2020, 08:14 AM
On another forum they said to use the Raytech seal, anyone use those?
Che70velle
03-15-2020, 07:19 PM
I found this can anyone verify this

https://www.bing.com/videos/search?q=replacing+12+bolt+pinion+seal&view=detail&mid=DE92CDE42D0DE21174E7DE92CDE42D0DE21174E7&FORM=VIRE

Seems right. I’ve put 3 new pinion seals in my 12 bolt...they all 3 leak. I am going to do a gear change soon, and I’ll try the spacer mod.
Thanks for posting this!
BonzoHansen
03-15-2020, 07:25 PM
https://r.tapatalk.com/shareLink/topic?url=https%3A%2F%2Fwww%2Ecamaros%2Enet%2Fforu ms%2Fshowthread%2Ephp%3Ft%3D467659&share_tid=467659&share_fid=37943&share_type=t&link_source=app

Hope that link works. I find Freddie (big gear head) is always right. He built rears for a living in his shop for like 40 years
68454RS
03-16-2020, 08:49 AM
Ratech Pinion Seals 6109, Got mine from Summit racing https://www.summitracing.com/parts/RAT-6109
68454RS
03-16-2020, 08:49 AM
On another forum they said to use the Raytech seal, anyone use those?

Yes and it worked perfect
Che70velle
03-16-2020, 02:55 PM
Well then...I’ll try the Ratech seal instead of the spacer mod.
Jimbo1367
06-23-2020, 05:48 PM
Great find. Thanks to all that have added to this thread. This should be a STICKY

Jim
71 RAT
08-03-2020, 05:59 AM
I 2nd spacing the seal. I rebuild driveline for a living, this has been a problem for some time. I machined a spacer for my car years ago. Customers, I use C4 C6 square cut servo seal to space the away for the bearing.
68454RS
08-03-2020, 06:54 AM
I 2nd spacing the seal. I rebuild driveline for a living, this has been a problem for some time. I machined a spacer for my car years ago. Customers, I use C4 C6 square cut servo seal to space the away for the bearing.

With the Ratech Pinion Seals 6109 you don't need a spacer