What type of fluid should I run in my 2001 7.3 6 speed manual?
Does it require any additive?

 

Plain ol' ATF. Or syn ATF...

 

How much ATF did your transmission take when you changed the fluid? I want to order enough for my x-fer case and tranny.

 

anyone have a good write-up of changing the tranny fluid in a six speed?

 

Use Syn ATF. These trans get HOT! I've seen over 235* on mine. Mine runs about 180 on thy HWY. Make sure you can get the fill plug out before you drain fluid. Use a 3/8 ratchet or breaker bar with no socket. It'll take about 5.8 qts and the transfer case takes 2.

 

I have an '01 7.3 1 Ton Crewcab with a 6 speed. I flushed the trans and went back with synthetic. This is the only manual transmission with an internal pump that sends fluid to a cooler so I added a Diesesite fullflow external filter and temp gauge. I tow a 13K fifth wheel so I want as much filtering and cooling as possible. During summer running empty I'll run @ 130 degrees at highway speed and @ 180 degrees towing. It was worth the added expense to me.

 

Thanks!

 

That's really all there is to it. Drain from plug on bottom, fill from plug on side. Takes about 6 quarts. I bought one of those lids that has the clear tube attached to it. Screw it on to the bottle of ATF, stick the clear tube in the fill hole, and turn the bottle upside down and dump it in, then repeat.