new to the forum, but ive searched for months about this.
bought the truck with a blown tranny and 366xxxkms it. it has 2 issues that may or may not be related, it studders off an idle for a few seconds sometimes. injector cleaner helps briefly. transmission is a late model 4l60e (came with an early model but the tranny was 100 bucks) that has a shift kit (not sure if it causes the problem or is an attemped solution) it slips from 1st to 2nd kind of a delayed engagement. been like that for thousands of kms. as for the studder i have changed tps and map sensor also cleaned maf. im kindof leaning towards the maf but i dont want to throw any more money at it. the tranny ive switched all solenoids and pressure thing with the old tranny, no difference also tried uping the shift psi with a shift boss that worked.. till it warmed up then it goes into like a first gear lockout and shifts at 3500. any insight would help