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th400 replacement not working

  
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th400 replacement not working

 
shaytl1000r shaytl1000r
New User | Posts: 3 | Joined: 11/07
Posted: 11/15/07
09:27 PM

I just replaced my old th400 with a new one from summit racing.  Got everything hooked up and ready to go, but now the car doesn't go!  No matter what gear you are in the driveshaft doesn't even attempt to move.  What did I do wrong. Help!  

 
BOTTS BOTTS
New User | Posts: 15 | Joined: 11/07
Posted: 11/16/07
04:20 PM

make sure that the trans fluid is full, torque conv is all the way back on the shaft, bolts are in from fly wheel to crank, and fly wheel to converter., trans filter is in place.....let me know.   Josh    

 
shaytl1000r shaytl1000r
New User | Posts: 3 | Joined: 11/07
Posted: 11/17/07
02:42 PM

It ended up being low on fluid.  The car moves now, but it vibrates like crazy.  I know it is not the driveshaft since it vibrates even when the car is not moving.  The vibration gets worse when you put it in reverse or drive.  Its not to bad in park or neutral.  The vibration seems like it is coming from the engine more than the tranny.  

 
BOTTS BOTTS
New User | Posts: 15 | Joined: 11/07
Posted: 11/19/07
07:16 PM

did you use the correct flywheel???? i think that the 400 trans has a different flywheel than a 350 turbo automatic.  the balancing is different.  

 
shaytl1000r shaytl1000r
New User | Posts: 3 | Joined: 11/07
Posted: 11/21/07
04:42 PM

Car is a 75. It was originally equipped with a th400.  I just replaced the old one because it was shot.  Flywheel is the same one that was used with the original th400.  The flywheel isnt cracked and the torque converter is bolted up right.  I just cant get rid of the vibration.  

 

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