What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Tonyrodz]

I am with these guys. My guess is that the side or spider gears are damaged. The good thing is, I don’t see G80 on the RPO which means that parts are not too expensive if the ring, pinion and bearings are ok. Time to pull the cover.

I wonder if it'll be cheaper to fix it or replace it totally.

 

[George B]

I wonder if it'll be cheaper to fix it or replace it totally.

That depends on whats wrong. If you replace it yo will want to swap your brakes over. Hopefully you get one with good backing plates for the brakes or the axle shafts need to come out.

I would take the cover off and inspect after confirming the fill plug comes out.

 

[Rocket Man]

That depends on whats wrong. If you replace it yo will want to swap your brakes over. Hopefully you get one with good backing plates for the brakes or the axle shafts need to come out.

I would take the cover off and inspect after confirming the fill plug comes out.

Dorman makes two-piece backing plates that don’t require the axles to be removed in order to replace them. It’s one of the few parts made by them I actually recommend.

 

[George B]

Dorman makes two-piece backing plates that don’t require the axles to be removed in order to replace them. It’s one of the few parts made by them I actually recommend.

Good to know! I have pulled too many axles up here in the rust belt.

 

[Walchit]

Hopefully they're not Castech 862 heads. I think one on my van is cracked. Got a pic of the logo on them? Castech logo looks like a battery.

Unless I'm blind neither set I have are castech. I am willing to bet the 706 heads in the truck are, because I've seen a little moisture on the inside of the oil cap. Idk if that indicates castech problems for sure though.
I will take some pics of the heads here in a minute

 

[iamdub]

Oh, and these are the updated valve covers right? I picked them up for 50, came with a set of 862 heads, rocker arms and 15 pushrods lol.

Gonna have to flip that driver side cover over. If it has the circle hole in the baffle, it's the older style. You're looking for a square hole.

 

[iamdub]

Unless I'm blind neither set I have are castech. I am willing to bet the 706 heads in the truck are, because I've seen a little moisture on the inside of the oil cap. Idk if that indicates castech problems for sure though.
I will take some pics of the heads here in a minute

If it's a little moisture, it could just be normal condensation.

 

[Walchit]

Gonna have to flip that driver side cover over. If it has the circle hole in the baffle, it's the older style. You're looking for a square hole.

Geez! Guess I'm still looking for a valve cover then, lol
@Tonyrodz no castech that I can see on these

 

[Tonyrodz]

Geez! Guess I'm still looking for a valve cover then, lol
@Tonyrodz no castech that I can see on these

Nice.

 

[iamdub]

Geez! Guess I'm still looking for a valve cover then, lol
@Tonyrodz no castech that I can see on these

Well, dammit.

You gonna do any work to them heads? They're actually a bit of an underdog and just need some mild porting and maybe some stock intake valves from the 799/243 heads. Good for low- to mid-range torque.