6spd stalls high on a hot soak

[Js95gt]

Ok guys, I have one that is really eating my lunch. 2006 6spd, suncoast 6-3r kit with a Precision converter. After getting trans to temp and shutting off for 30 minutes to an hour, upon restart, the converter stalls VERY high. If driven a short distance it will start to operate normal again. I have verified the turbine speed is at 0rpm when this occurs with the truck not moving. The trans is in gear. I have swapped converters and have the same issue. Not real sure where to go now. Any help is greatly appreciated.

 

[juddski88]

are you really trying to stall it or do you mean that it couples late?

 

[Js95gt]

It drives as if it has a 5000 rpm converter. Just revs then somewhere around 2200-2500 rpm, the truck will just start to creep forward. This is with the brakes off, lol.

 

[Mike L.]

You are getting drainback from the converter. You may be low on fluid or you cut a sealing ring.

 

[Js95gt]

I considered converter drainback, but it doesn't happen cold. If I let it sit all night long, it works perfect in the morning. I pulled the front of the trans down while swapping converters and didn't see any cut rings. I could have missed one though. The problem only seems to happen on a hot soak of around 30-60 minutes. Could it be a damaged filter sucking air?

 

[Mike L.]

I considered converter drainback, but it doesn't happen cold. If I let it sit all night long, it works perfect in the morning. I pulled the front of the trans down while swapping converters and didn't see any cut rings. I could have missed one though. The problem only seems to happen on a hot soak of around 30-60 minutes. Could it be a damaged filter sucking air?

That would have been my first check.

 

[SmokeShow]

I have the opposite problem - mine is slow to move when first started on a cold start (not necessarily cold ambient temp, just no heat in the engine/trans/etc) then gets better as things warm up.

 

[Js95gt]

Well it did it cold this morning also. I checked filter and all is well. Pulled trans and tore it back down. There is a minor scuff on the farthest down sealing ring that seals inside the converter... Not sure if its enough for this issue though.