93 Chevy 1500 Shakes While Shifting Out Of 1st

[3Gchevytruck]

any one else have or run across this problem

 

i have a 93 chev 1500 4x4 automatic

when i got it back it shifted hard going out of 1st 1 hard

bam and into second

 

so the tranny guy rebuilt it again now its several smaller

bam bam bams when its shifts out of first whole truck

shakes violently

 

only does this after it warms up shifts 100% perfect

smooth when cold.

 

tranny guy says he had it out 4 times and cant find problem and its probably electric

 

called the auto electric guy and 2 other tranny guys and

they say if there is no codes being thrown probably in

the tranny and "probably" not the electrical system

 

before i spend a couple hundred to find out that the

electrical system is good i want to research it (i dont

spending the money if that is where the problem is)

 

the reason i question this is the tranny i had rebuilt was

making a loud sound but shifted perfect it was a

preventive rebuild since it was going out.

 

any one else ever experance this.