Hey guys long story short my 72 f100 390/c6 got stuck in some mud before school. I had to get out and managed to but I overheated the check out of the tranny. It slips bad but once moving it shifts ok. The fluid is Brown and this tranny was rebuilt 8k miles ago. Will a full fluid change save it???

 

It won't hurt it. Tranny fluid is supposed to be red, no other color.

How did you overheat it? It doesn't get hot by itself...

 

I was raggin on it really hard getting out of That mud for about 20 mins. It was constantly going from 1st hear to reverse over and i over rocking it back and forth, not drive but 1st. I overheated the motor but it is ok I pulled it apart for a bad lifter and a bent valve but the headgaskets were ok. But the tranny I'm worried about

 

Change the fluid a couple of times. Do this with a bucket of
new fluid pumped in through the cooling lines. Than add
Lucas trans treatment. This snake oil is the only one I have
ever had any luck with. If this don't help than your clutches
and band linings are worn out and she needs a rebuild. Sorry
but unless the vacuum line got pulled off the modulator while
stuck in the mud there isn't much else you can do.

 

1ST gear is a clutch pack in a C6. Drain it's fluid carefully and check for metal media in the fluid or on the bottom of the pan. Too much of it shows the forward clutch discs wasted. If just a little try new fluid and a filter.

 

Alrighty. Thanks guys!

 

No, it will not. You've destroyed it. You can change the fluid as many times as you like, it won't build new friction material on the destroyed clutch. You can also add any additives you can find. They also won't build new friction material. The only way to fix this trans is to rebuild it.

 

I agree with mark that it's probably smoked. But now you can build it for performance, and add a big cooler.

 

I also think the transmission is trashed and like the upgrade suggestions. But!!! Regardless of how tough you build a transmission or big cooler upgrades it won't stand up to hammering on it back and forth for 20 minutes! I don't want to be overly hard on there OP guy but if he was running it hard enough to overheat the engine/transmission and bend a valve I very much doubt that he waited the second or so for the transmission to shift before slamming on the gas, a transmission will take a tremendous amount of abuse if you just wait a second or two after you shift for the clutch packs to lock up.

Edit, he said it was before school so I'm assuming he's a younger guy, I definitely wasn't very nice to my trucks when I was a young guy, I did learn a lot about my trucks through my experiences though!

 

Rebuild the tranny, then get super swampers and lockers so this stuck in mud crap doesn't happen again! Haha

 

Yeah I was rough on it. Iearned my lesson though! I'll change the fluid and drive it till I can't, then rebuild it or do an upgraded aod swap. Thanks for the help guys

 

If you're going to do an AOD swap, you'll have to buy an adapter to couple the AOD to the 390. There are no 'modern' Ford overdrive transmissions (built in the last 25 years) that will directly bolt up to an FE.

 

Yeah I know. I have 3.25 gears right now and even with 33in tires I still spin 3k at 65-70 mph I'd like to run 3.73 gears and have overdrive. It would get up and scoot then!

 

I don't know if there are any aftermarket 3.73 ratios available for a Ford 9-inch (??, never seen any) but, there were no factory 3.73s in a 9-inch. However, 3.70 was a common factory ratio for Ford 9-inch rears in the trucks.

 

Well if I get any taller gears I'll have to find a traklok cause this 1 wheel wonder crap doesn't hook up at all when I romp on it