T case output seal

[rascole]

I am in the middle of swapping T cases and the rebuilt one I had stored was rebuilt with a rear seal with no boot but a spring retainer. The old case has the boot but does not have a spring in the rubber seal. Who has used either and which one is better?

 

[Happy Hummer]

Looks fine to me. When I rebuilt my np231 I used the spring style and seems fine.

 

[rascole]

Got the new seal yesterday, bought the rubber bot style. The spring is on the INSIDE of the boot, I didn't think to look at the old seal good enough but it is there. New seal installed and will install TC tomorrow.

 

[Jeepwalker]

Did you replace the output bushing?

If so, the DS should be relatively 'tight' and a flat seal will be ok. But if you off-road a bunch or drive through sand where the DS will get dirty/dusty, the boot style keeps the joint cleaner and the seal longer lasting (that's the idea anyway). I've used flat seals on older square bodies and they lasted decent enough.

 

[rascole]

Case was a full rebuild, chain and all. Apparently that seal is common for a lot of other GM cases. All good now with correct boot style.