I recently got a 2000 Chevy 1500 with a cammed 5.3. Unsure of the trans or if it has a stall converter matched for the cam. I got in it the other day and shifted into drive and it slammed into gear and made a banging noise in the rear differential. It drives smooth, shifts smoothly until I turn at a light where its idle is low. I can hear the rear differential make that banging sound. I’ve taken the bed off to diagnose it and the banging is definitely coming from the diff. But why? Why is it so hard? Thanks in advance!

 

When you go from Park to Drive is when it bangs?

Otherwise shifts fine between the gears once it's put on Drive? 1-2, 2-3, 3-4 shifts okay?

Pop the differential cover and see if there's anything out of the ordinary...

 

Yes besides the initial shift from park to drive or reverse it shifts very well! Smooth and consistent! I will do that and post an update. I have a video of the banging but it’s too large so I’ll post it when I get it shrunk down!

 

You can upload it to Youtube, then post the link here.

It does sound like it's the rear end...and not the transmission.

Look at your RPO code to see if you have the G80.

 

https://medal.tv/games/dayz/clips/mB...IsMTk2OTUwNzQx

I did it on Medal before I saw your post.

 

I found a code that says GU6 in my glove box. Not sure if its the G80 rear or not but to my understanding its the gear ratio "GU6"