I have a 78' ford F150 well there is no shame for the tranny but today, I ran a part to the neighbor in it and when I pulled into the driveway, I went to back out on the road, put it in reverse and it was just in a bind... truck just groaned... so I put it in neutral, and it took off forward... park groaned... when the truck is in neutral i believe it's taking off in 2nd, I don't feel the linkage is out of wack. Has anyone else had this prob. b4? If the tranny is junk it's not a real big deal I know where there is a 4spd for 100 bucks but I'm kinda tight on money right now.

 

sounds like either the spool valve in the valvebody broke, or a servo is stuck. i have had 3 that broke the spoolvalve, and many more that the 2nd gear servo got stuck on.


jim

 

is there an easy way for u to explain how to fix this?

 

I don't think it's the valve. The Bellville spring in the one clutch pack broke and it has locked up the clutch that it cannot release. Sorry to say it has to come out and be
rebuilt.
Kotzy

 

Consider this with the 4spd swap too... you will have to swap the pedals and find a clutch pedal and bracketry, etc. Also you will have to play with the driveshafts, and find (or modify) the center floorpan/trans cover in the cab for the shifter.... add in the new flywheel, bell housing, clutch and throwout bearing, etc and the 4spd swap becomes a bit more involved and pricey than $100. Another option would be to pull and rebuild the C6 yourself. A TCI rebuild kit runs approx $190 from Summit racing, add in another $25 for the TechTrans manual for the C6 and you can go thru it for around $215, provided you dont need anything else (drums, etc) Even if you do need drums, etc you can pick those up for not to much from your local trans shop ($15-20 usually)

I just did the C6 in my F250 (Forward clutch was bad) and with the TechTrans manual it was a piece of cake (it shows all the testing procedures, teardown and reassy w/ diagrams, plus clearances, etc)... the hardest part was getting around the exhaust system when I pulled and installed it as I use a crossover to run duals on a 4x4.

 

Well I just got a NP435 for 150 bucks... came w/ 351M bell housing, clutch pedals/bracketry, linkage, fork and flywheel. I will buy a new clutch kit, so that will come w/ a new clutch, pressure plate, and throwout bearing. I will get the flywheel resurfaced. And modifying the floorpan cover will be no big deal, however what kind of mods will I have to make to the tranny crossmember and driveshafts? Are the driveshafts shorter or longer when swapping in a man. trans? Thanks for all the help guys it's really appreciated.