There is a plastic vent on the top of a 10 bolt rear end I purchased that was brittle and broke off. What is it and where do I get a replacement?

 

it is a vent that allows air to escape the rear axle housing as it heats up. This prevents oil from being pushed out past the seals.Not sure if you can still get stock new ones, if so they are just a light press fit.

Otherwise there are off the shelf vent units that may be able to be used.

It is important as it not only vents pressure, but prevent water from getting into the housing.

RBob.

 

You can get a new one from GM.

 

The GM part number can be found in the following link:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

 

Why is there a fill plug, but no drain plug???

 

Would have cost extra money, no doubt.

 

An ounce of prevention is worth a pound of aggravation.....So you either have to siphon it out thru the fill plug or take off the inspection plate or cover and buy a new gasket..and a new cover with a drain plug...Nice...

 

???

I keep whole tubes full of tubular style ones on hand at all times... they look something like this... there's a variety specifically for rear axles