2002 s80 trans slipping swap or rebuild?

[SlowLane]

The ATSG technical manual for the 4T65E has the following approximate capacity numbers:

Bottom Pan Removed 7.0 liters or 7.4 quarts
Complete Rebuild 9.5 liters or 10.0 quarts
Completely Dry 12.7 liters or 13.4 quarts

I'm within 3/4 of a quart it looks like. Next time I get the car I'll check and see if it will take a little more

You're probably good where you are. The manual emphasizes that those are approximate capacities. Like, ballpark figures, dependent on how much fluid drained during your rebuild.

[bronco]

One thing I learned from this project If the lube pipe in the pan pops out of its hole then the final drive will not be lubricated.

I have a friend who drives a chevy with this transaxle that suddenly started making a howling noise which is tied to road speed and happens in gear or neutral and I think that might be what happened

I am considering offering to look at it on spec. Im sure it needs a filter and fluid change but I'm curious if that pipe will be kicked out.

On the other hand maybe I should leave it alone No good deed goes unpunished as they say.

Its just that I have an extra filter and pan gasket from the volvo job I could find a home for spare parts and make a few dollars while my memory of this trans is fresh

[SlowLane]

One thing I learned from this project If the lube pipe in the pan pops out of its hole then the final drive will not be lubricated.

I have a friend who drives a chevy with this transaxle that suddenly started making a howling noise which is tied to road speed and happens in gear or neutral and I think that might be what happened

Sonnax makes a clever Lube Tube Retainer kit. It's inexpensive, effective and quite easy to install.

However, it your friend's case the damage might already have been done.