I'm planning on flushing the tranny and was wondering if someone could tell me which of the tranny cooling lines is the return line from the radiator looking from the top. Any tips for the procedure?

 

Check out this post But I forget if the S40 is different for the pressure line.
https://volvoforums.com/m_2623/tm.htm

 

Tech, i have a 1996 960. Does this changes anything?

 

Sorry My bad not sure where I got S40 from but it should not change anything at all.

 

I must admit that the tranny flush is a total success. More or less I followed whats posted on the link that Tech posted. Just to sumarize what I did:

1. Drained fluid using the drain plug located in the tranny oil pan and measured the amount of drained fluid (I used old coolant 1 gal canister with marked 1 qt measurements).

2. Cleaned the pan inside and applied new "chemical seal" (for some reseaon volvo didn't put a seal between tranny and pan but they use this chemical seal).

3. Refilled fluid.

4. Disconnected the upper (looking from the front of the engine bay) ATF cooling line from the radiator - this is the return line from the radiator to the tranny.

5. Using a funnel with attached to it a clear 3/8" hose (got the funnel/hose as one part at auto zone for like few $$$) and using the old coolant canister with marked 1 qt marks (this canister fits nicely in the open space on the right side of the engine) I flushed the fluid by starting and turning off the engine untill new ATF was flowing from the radiator (I had to start/turn off engine because the flow rate of the ATF was higher than the capacity of the funnel allow). During the flushing process, I measured the amount of flushed out fluid and added new fluid accordingly. This is a 2 man operation.

If someone is attempting to flush the ATF, make sure that you have enough of the fluid. I used 24 qt of fluid.

 

Thanks for posting but one Favor.

Can you post it in the post that we made about Members write ups please.

Just copy and paste it in there.

 

Done

 

Thank you.