PRCT

the converter was new replaced at trans rebuild , my local shops think in electrical, what in that line could cause this problem?I have had connectors off and cleaned, checked alt and replaced and checked again with a .000 and .003 result. Iam lost on this. how do you all feel about the GM solenoid upgrade any good

thanks guys I have replaced valve body and solenoids, I have no switches on truck , considered the unlock switch found on this site but after it was still locked after siting all night don't think that would help . sounds like new converter all though it only has about 10000 miles after rebuild with new half billet converter if the shop actually put in what they said. have checked or/bk wire seems to be good

I was looking for a cheaper answer but was afraid of this have any suggestions for a replacement the engine is stock but I do tow a 7000lb rv.

ok unlike most My converter does not unlock most of the time. I have replaced and checked new alt. with new method, replace control solenoids, when I come to a stop it stays locked ,shifting to neutral does not unlock it. when I put back in gear will kill engine. when I restart it is unlocked. all though when I started it today after sitting all nite it was locked, shout it off when restarted it was unlocked.it seems to work fine when cold after warm up it fails to unlock. most of the time.also it was rebuilt about 10000 miles ago with new half billet converter.truck has 220000 miles