trouble shooting
 

Hey there guys.
I’m just wondering if I could get some help, heres the situation. I recently put a newer engine and transmission in my firebird. The engine I put in was a 305 with (what I’m told anyways a turbo 400 transmission). There were some problems with the carb so I reasently replaced the old quadrajet with a brand new edelbrock 650cfm and the intake manifold with a band new edelbrock manifold. This was my first time doing this kind of work. I followed the instructions with everything and hooked up all the vaccuum lines just like before but now the tranny doesn’t shift god at all. I was told to make sure the vacuum line was hooked up but I can’t find one on the transmission is it possible that there isn’t one? Because I don’t remember unhooking one.

Thanks Mike:confused:

You need to run a vac line to the Vac modulator on the trans. On a 400 it will stick out like a small can near the belhousing on the passenger side. If the trans is a 350, the modulator will be on the same side but back at the rear next to the tail shaft.

I jaked the car up today and looked for one and I can't for the life of me find where to hook up the vacuum line. I looked at the on intakemanifold and the vacuume line in that where you hook the tranny to was closed off. so i don't think it was hooked up before. And it shifed great before. :confused:

after more investigation I found out that I have a th 700 r4 there is no vaccuum modulator on the transmission. But I still have the same problem with shifting, it won't shift out of 1st . and it feels very sluggish untill the engine reaches 4000 rpm. anyone know why this might be?

thanks

adjust the kick down cable
 

your kick down might be your problem.

The problem is that this thread is verrry old.. :sweat:

this thread is 2 years old.

the 700r4 does not have a kick down cable. There is a TV cable.

If the TV cable is not set properly the trans can go into "fail safe" mode... then the 700 tranny will shift late as if the throttle is WOT.

I have closed this thread since it is 2 yrs old.

thx

:D