InfamousRacingCisko

So I got a yank 3600 converter and 373 gears intalled..car was running good so one night I got on the converter to 2500 rpm and went up like 60 foot as I was comming to a stop I felt a clunk and tempetures got pretty high check engine light came on..so I was at a dead stop and as I pressed the gas to go rpms went pretty high and car barely moved so finally car moved and as it goes I felt clunks and rpms just free reving..took car back in and got a new transmission built level 4 or 5 can't remember..got the car back running great put 300 miles on new tranny did a couple test passes and ran great tempatures on tranny stayed cool.. As I did the test passes and just now I was getting the car ready to go to the track and I was making sure everything is fine I got on the converter to 2500 rpm went up a couple feet and it started doing the same thing..tranny temps got high and I press gas to go rpms go up to 4k and car barely moves then finnally gets going and I fel same clunks and rpms free reving..what can it be ..we thought it was the trans so got abuilt one..can it be the converter? Thanks alot

9000th01ss

iTrader: (10)

you didn't put a used converter in a fresh trans dod you? Did you have it cut opened and cleaned/inspected?

performabuilt

iTrader: (25)

could be the converter or trans I supposed but though description is a little vague I will ask. Did you have the car tuned for the stall and of so was the test for code PO757 removed. After you turn the car off and back on do things return to normal?

99Hawk262

iTrader: (19)

I hope so. Unfortunately, this is all too common.....and arguably one of the most important steps. FWIW, I used a fuel pump out of a 4.8L truck to flush out my coolers/lines.

InfamousRacingCisko

i dont think they sent the converter off to yank to have it checked

InfamousRacingCisko

once i turn the car off and let it cool down for a bit itll drive normal but once i get on the converter itll acted up

InfamousRacingCisko

btw speedo dont work either

performabuilt

iTrader: (25)

Ok
1- I am betting its setting limp mode due to the converter when you stall it and needs tuning.
2- The speedo not working means theres no VSS signal so the PCM will have no idea how to controll the transmission

Untill you address these items there no way to know if you have any other real issue.
See a tuner and solve the speedo issue and get a proper tune then see where you are at.

InfamousRacingCisko

thank you what causes it to go into limp mode? when it gets to hot?

performabuilt

iTrader: (25)

No the PCM becomes confused either because of the stall or the missing vss signal and or both.

InfamousRacingCisko

i see so what do u think is causing the trans temp to go high?

performabuilt

iTrader: (25)

Well stalling and limp mode will do that. Address the things I mentioned then see how things go. They are critical .

99Hawk262

iTrader: (19)

Mine did it when I'd be in 4th and slow down, but not enough to drop in to 3rd. When I'd try to accelerate again, it'd immediately go in to limp mode. Shutting the car off for a few minutes would reset it, but the light would stay on. If you are in limp mode, that would be the cause of the excessive heat IMO. It locks it in 3rd IIRC and that's a lot of load on that gear, especially if you are going really slow, or taking off from a stop.

InfamousRacingCisko

im going to drop it off monday at the shop would it hurt if i drive it to work till then?

performabuilt

iTrader: (25)

It should not hurt it.
Bear in mind though while a trans shop may be able to address the speedo/vss problem they will not likley to be able to do the needed tuning for the stall.

InfamousRacingCisko

yea my tuner is about 5 miles from the trans shop..