looks like RPMs fluctuate in park, idle jumps around 400-500 RPMs, also while driving, which may have contributed to killing the old transmission.

the shop can't figure out the problem with the idling...they replaced MAF, all vacuum lines, cleaned out the throttle body, and what's stumped everyone is its not throwing any codes, no CEL, or any light for that matter.

Has anyone seen this before, would really like to avoid just swapping out parts at this point.

thanks,