Any Way to Beef Up Rear End in AWD Denali ?

[Rocket Man]

the ta performance rear diff girdle and a QA1 panhard bar will fit, I also put spohn boxed lower control arms and mevotech upper control arms, hellwig sway bars front and rear.
if (when) the G80 goes out then I will put in a Eaton Detroit.
@Rocket Man has some info on that also.

I have pretty much that exact setup on my 02, but the NNBS models are the same. I’m running a supercharger, cam and headers and figured I’d at least keep the bearing caps from deflecting under load which is a known problem with the G80 and high hp applications. From what I’ve read that’s one of the main reasons for the G80 detonating.

 

[Foggy]

Well I decided to replace the G80 diff with a PowerTrax Grip Pro Diff... It's really the same as the Detroit/ Eaton Truetrac with the Helical Gears/ Worm Gears
I have 2 of the truetrac in my 9" rear ends (G body & 94 Step Side) and really like them.
I talked to some "rear end gurus" and said that would really help as it's the weak point of the oem G80.

So, I'll have the better Diff. Spohn Lower Boxed Control Arms, Hellwig Sways Front & Rear. I've already replaced the
oem air shocks with new delcos and put in helper air bags inside the coils.

 

[97audia4]

Well I decided to replace the G80 diff with a PowerTrax Grip Pro Diff... It's really the same as the Detroit/ Eaton Truetrac with the Helical Gears/ Worm Gears
I have 2 of the truetrac in my 9" rear ends (G body & 94 Step Side) and really like them.
I talked to some "rear end gurus" and said that would really help as it's the weak point of the oem G80.

So, I'll have the better Diff. Spohn Lower Boxed Control Arms, Hellwig Sways Front & Rear. I've already replaced the
oem air shocks with new delcos and put in helper air bags inside the coils.

Did you go with 4:10s? I'm getting ready to pull the trigger here this week on rear diff and front diff to match .

 

[Foggy]

I'm going to stick with the stock 3.42 gears.. Mostly due to cost..
I had thought about going to 3.73, but since its AWD it doubles the cost.
I'm not going to replace the R&P, just the diff itself. That way I don't have to reset the R&P lash, etc...