Thanks in advance for any advice I may get from you all! I sure need it...
So, what I've got is a 78 Fairmont with a newer HO 302 coupled with the original C4 trans. It's got a few issues and I'm not sure if it's toast or repairable. First off, as soon as I take off from a dead stop it very quickly shifts through all the gears and into 3rd by about 10 or 15 mph, unless I manually hold it in the desired gear. Then it will not down shift unless I give it gobs of throttle. Second, if I am laying on the gas hard it goes into a "false nuetral" between 2nd and 3rd gear, where it revs freely until I let off the gas fully, at which point it will finally shift. I replaced the shift modulator and trans filter, made sure the vacuum lines were good, adjusted the kickdown linkage, and adjusted the bands to no avail. All the gears hold strong with no slipping aside from the 2-3 shift issue.
So, what do you think? Could dropping the valve body and cleaning it real good help? Could my performer intake and carb be screwing with the kickdown linkage? Do I just need to rebuild it? I am a trans novice, but everyone says C4's are dead simple. I just don't want to go through it and still have the same issues. I do want a stall and shift kit anyhow, so this is a good time to do those things. Thanks!
BTW, I bought the car with these problems existing (just made more apparent with a switch from open 2.47 gears to a 3.27 geared track lok)
