Launched my c6 on the way to work today....slips like mad. Anyone in the New England, Upstate NY area have one.. I would like a good used one, can't afford new, I think rebuilding is expensive. My truck is my daily driver, and this puts a damper on things. Any help would be greatly appreciated.

Thanks Chris

79
F250
2wd supercab
460ci

 

The c6 is one of the toughest trannys on the market. Mabye yours just needs a tune up? when was the last time you changed the fluid/filter in it? sometimes that can make all the difference, and it is a heck of a lot cheaper and quicker than a tranny swap. I know on a rare occasion they can go out, cause I had to have mine rebuilt about 2 years ago. 2nd gear went out completely, but all the other gears worked fine. It never slipped or anything.

 

The band might need to be adjusted/tightend. Get a torque wrench and get under neath the truck. On the drivers side of the tranny where the kickdown/shifter controls are there is a band adjusting screw. Theres a lock nut and then the screw, losen the lock nut and tighten the screw to 10 ft-lbs. Back off the adjusting screw exactly 1-1/2 turns. Hold the adjusting screw from turning and snug up the locknut. See if it still slips. Get back to us. All information is from 365-127-79A Ford Truck Shop Manual.

I had a hard time finding my locknut/screw, was covered in dirt and looked like it was part of the transmission housing. It should be about 1"-2" directly infront of the kickdown/shift controls are.

 

before you do any of that stuff, check the fluid level first.