Motor/Transmission Problems....Again

[351carlo]

Alright guys. Put my Edelbrock 600cfm on tonight, and it ran great (Compared to what I was trying to work with before). Problem is, I still get a miss, and then when I begin driving it, it stumbles. The whole car just hesitates at moving. I get the feeling sometimes the transmission is slipping, but others I feel is the motor stumbling.

Bigger problem. Bring the car out onto the local freeway, and it downshifted from 3-2 at WOT. Guys, this was not a fun thing to listen to. It scared the living daylights out of me. Why would I be downshifting from 3-2? I also have been having trouble upshifting 1-2, it takes abnormally long (Revving the same RPM for quite some time, even if the throttle is floored). I got the new A/T Filter and fluid, so hopefully that'll be good. I'm also replacing the Vacuum modulator at the same time, and possibly running a direct new line straight to vacuum feed off carburetor or manifold.

Any suggestions here guys?

351C with FMX
Carlo

 

[SadbutTrue]

did your shifter fall outta place? mine does that occasionally... just plop it back in position and keep going. check vacuum to the tranny and tranny fluid too.

yes, i need to rebuild my transmission

as far as hesitation goes, try messing with the timing as well as any of the carb settings (air/fuel ratio, idle speed, etc). as long as it runs well otherwise, its probably a minor tuning issue.