Tranny Filter Change

[chachl3835]

99 F250 CC 7.3 PSD 4R100...... Ok got the truck up on the lift and am getting the filter tomarrow Dexcron III/Mercron is the correct fluid to use correct??? Also what is it 6-8 qts for the filter change? Any one specific brand to use on this truck?

[dmd]

No specific brand, just hard to find now... 6-8 would be a bit high. I thin it is only like 4-5. If changing the filter, why not flush it all out at the same time?

[chachl3835]

doesn't it have to be warmed up (oil that is) to be able to get it totally flushed???? Or am I not right??? any special tricks or tips to this tranny?

[Highbeam]

Until the transmission is above 100 or so, the coolers are being bypassed so to flush a cold tranny will not be flushing the coolers. You can always replace the filter and then flush the transmission at the next convenient time. Yes, you will be filtering the "dirty" fluid for a time but I would propose that the old filter was a finer filter anyway since being partially clogged.

[NCHornet]

Drain pan, remove pan, replace filter, replace pan, poor 6 quarts of new fluid back in pan, pull return line on the trans , this will be the one to the rear, place a clear hose over the end of the return line and run to a bucket. Have someone get in truck, start truck, and with foot on brake shift through all the gears stopping for 3 sec in each one. As soon as you see air bubbles in the clear line stop truck, fill with 6 more quarts, go through the gears again, including reverse, refill pan and top off as needed.
Yes Mercon/Dexron III is the correct fluid to use. Any quality fluid is good to use. I like the Napa brand made by Valvoline.

NCH