transmission help

[J-Rod1984]

Just bought a 1984 C-15 with a true 350, holley dominator intake, and edelbrock 4-barrel. Not sure what tranny I have but it seems like it shifts too early. Furthermore, when I stomp the pedal it won't downshift. It just accelerates from top gear. This doesn't seem right to me. Any advice?

 

[SlickGTP]

@HotRodPC is usually the go to guy for transmission help, but we still need more information, such as which transmission you actually have.

For help identifying which transmission you have I'd compare the image with your pan.

You must be registered for see images attach

 

[MadOgre]

Just bought a 1984 C-15 with a true 350, holley dominator intake, and edelbrock 4-barrel. Not sure what tranny I have but it seems like it shifts too early. Furthermore, when I stomp the pedal it won't downshift. It just accelerates from top gear. This doesn't seem right to me. Any advice?

what is a true 350 ?

 

[marks86]

what is a true 350 ?

not a false 350?

sorry couldn't help myself

 

[mtnmankev]

................. Now I'm confused.

 

[DoubleDingo]

I had a problem with mine shifting way too early. It basically went from 1st into 3rd before hitting 15 mph. I have a TH400 and replaced the modulator with a red stripe model from the parts store, and it made it shift a whole lot better. It's located on the passenger side and is easy to change out. I don't know much about automatics, but I do know about the modulator on the TH400...

 

[marks86]

I had a problem with mine shifting way too early. It basically went from 1st into 3rd before hitting 15 mph. I have a TH400 and replaced the modulator with a red stripe model from the parts store, and it made it shift a whole lot better. It's located on the passenger side and is easy to change out. I don't know much about automatics, but I do know about the modulator on the TH400...

I am with you 100% same Exact thing I went through, 12dollar part and it was adjustable also

Im pretty sure th350 have the same thing