5r55e band replacement questions

[B1oodCobra]

I have to replace my overdrive band and from what I can tell I should just have to take the bell housing off to get to it my question is can I re-use the pump gasket if it's still good or do I absolutely have to replace it?

 

[transman304]

Best to replace gasket and the o ring/ lathe cut seal around the bell housing and also front seal. Also each pump bolt has an o ring on them that most likely get destroyed when removing them.