Originally Posted by bowtie84c10
i have a 84 c10 scottsdale i recently did an engine swap in it to a mild 305 out of a 78 firebird left the transmission that was in the truck in it but now when i put it in gear it dies?? checked for vacuum leaks, carb has been completely rebuilt, new plugs and wires, cap and rotor, idles just fine runs real smooth no hesitation when you give it gas but every time you try to put it into gear(any gear) if just dies wont go nowhere im puzzled
could use some help been trying to figure this thing out for about a week now and still nothing
any Suggestion?? thanks for your time
i can think of a couple things that could be causing your problem. 1st is, whether it has a lockup 350 or a 700r4, try unplugging the connector on the left side of the trans and check for +12v. if it has power then, thats your problem as its energizing the converter clutch and thats what is stalling the engine. now this isnt very common, and usually oil is only available for lockup after the trans goes into 2nd gear.
2nd is maybe you used either the wrong bolts for the converter, or when pushing the converter up to the flexplate and it didnt go flush before you tightened up the bolts and has caused a warp issue to the converter and the clutch in the converter is being applied that way
and 3rd is, the thought of a bad ignition module or coil. i have seen where engines have run fine while in park or neutral and you put a load on it when put in gear and the engine stalls.
if by chance it is because of power going down to the trans then, id say you hooked something up wrong with either power or vacuum on your engine change. before the late 87 700r4's came out, they used a different way of locking up the converter and, vacuum and temp sensors on and from the engine were used to enable the torque converter clutch to engage.
in late 87- early 88, they changed it over to enable converter clutch operation from the v.s.s.