New 12 bolt pinion seal leaks
 

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

I found this can anyone verify this

https://www.bing.com/videos/search?q...74E7&FORM=VIRE

On another forum they said to use the Raytech seal, anyone use those?

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!

https://r.tapatalk.com/shareLink/top...ink_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

Ratech Pinion Seals 6109, Got mine from Summit racing https://www.summitracing.com/parts/RAT-6109

Yes and it worked perfect

Well then...I’ll try the Ratech seal instead of the spacer mod.

Great find. Thanks to all that have added to this thread. This should be a STICKY

Jim

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.