Hey everyone
First time posting here I have a 2009 gmc sierra with 2wd and 4.8l and just looking for some answers or ideas as to why my fully rebuilt transmission sounds bad from the start. Shop has now built 2 units with the same issues.
Delayed shifting (plus valve body noise) 1st to 2nd and 2nd to 3rd (slams sometimes) and shudder in 4th gear after 50kms.
I have attached video hopefully everyone here can view it.
Thank you in advance for your time.
20211024_115425_1_1_1.mp4