I hope to get some advise.

2003 Silverado 2500HD LB7 with Allison transmission.

I have what looks like a front trany seal leak.

This requires the removal of an ally that has 208k miles on it. (to my knowledge)

Should I refresh it or do anything while it is out?

I was thinking of the 6th gear kit for better economy. Yet that is only good when I am not hauling something.


I would like opinions please...