Car stalls when put in drive

[moparnole]

We just got the transmission rebuilt on the 72 charger, it will idle just fine, however when it is put into drive, about 50% of the time it will stall out, but I have also had it on the stands idling in drive just fine. In your guys expert opinions, what could be causing this to happen? Any help is greatly appreciated!!!

[c00nhunterjoe]

Idle circuit in the carb, timing curve too shallow. Some will say too tight a converter, but not typically.

[ACUDANUT]

 Check your tranny fluid level and look at bottom of carb for open vacuum/ports that are sucking in air.

[moparnole]

I adjusted one of the band's and managed to get it to go into drive without stalling, and even run on the stands in drive,
However when it's like that it will grind going from drive to park. Fluid is all the way full. Am I missing something with
The band's that could be causing all of this?

[John_Kunkel]

Bands have nothing to do with the initial shift into Drive.

If the rear wheels aren't at a complete stop when shifting into Park you can expect that grinding.

If the car went into drive OK before the trans rebuild, you could blame the trans (tight converter) for the stalling, otherwise it's a tuneup issue.

[ACUDANUT]

I agree, but anyway, how do you adjust bands on the tranny ?
I still insist on checking the carb, for vacuum leaks and maybe the choke.

[moparnole]

From what I could tell there are no leaks at the carb seal. The touque converter is the same we had on it before, we just had it rebuilt
While the tranny was out of the car, could it be that it was either rebuilt or installed incorrectly to cause it to bind up?

[ACUDANUT]

 If the torque converter was not aligned properly, you won't have a transmission very long.  Been there, done that.

[moparnole]

Ok guys, I sent the converter off to the company that rebuilt it the first time, and they could find no fault in it.
When I pulled it out, I didn't get a ton of transmission fluid out of the converter, could this mean that the problem is the
pump in the transmission?

[BSB67]

You really have not said anything that leads me to believe that the converter or tranny is the problem

[ACUDANUT]

You could have broke the pump trying to make the converter fit.  It has to be perfectly aligned and seated far back.

[John_Kunkel]

Converter way too often get the blame for stalling when placed in gear but 99% of the time it's tuneup related.

[moparnole]

There was also a sort of thudding sound coming from the converter when we let it run after we rebuilt the tranny and had the converter rebuilt,if that is any further help as to a diagnosis. Whenever I get a chance away from work I can pull the pump and check that for fault. I appreciate all the feedback you guys are giving!

[John_Kunkel]

If the trans goes into gear firmly enough to stall the motor, there's nothing wrong with the pump.

If you hold the brakes with your left foot when placing it in gear, can you keep it running with the throttle when it tries to stall?

[moparnole]

It will idle fine, and hold some rpm fine , and will also work well in reverse, when it was put into drive, usually about 70% of the time it would die when put in drive, and if it didn't die it would make a sort of clunk sound coming from the general converter area, and when I would apply the brakes, even gently to stop the wheels, it would start to die, and then stall only to fire right back up when I throw it in park and turn the key.

[ACUDANUT]

  

[John_Kunkel]

Once again, can you keep it from stalling by using your left foot on the brake and using the throttle to keep it running?

[moparnole]

Not at all, as soon as it's put into gear if it's gonna stall it just goes out, if it does get going in drive and u give it some brake u can hear like the engine has a load and then stall out when the wheels stop

[John_Kunkel]

You stated "Ok guys, I sent the converter off to the company that rebuilt it the first time, and they could find no fault in it." Did they say how they checked it? Did they cut it open?

Regardless of what they said, it looks like the stator sprag in the converter is slipping.

[moparnole]

After pulling the pump out of the transmission I have found that the reaction shaft is ridged and eaten up quite badly, I will do my best to post pictures after work. Would this have a propensity to cause the problem at all?

[ACUDANUT]

"propensity". Umm What ?

[moparnole]

Possibility to cause the problem, I learned that word in college and it's one of my favorites 

[John_Kunkel]

Yes, a stripped reaction shaft is due to a damaged stator sprag in the converter.

[moparnole]

Genrally speaking, how long would the converter have to be messing up to cause this sort of damage? I will try to figure out how to make pictures work tomorrow at some point. I appreciate all of the help and input you guys are giving!