Aluminum / XFE NNBS Front Suspension Rebuild

[992dr]

@petethepug Man I'm not sure if this has been covered.
Do the hubs from the 07/14 fit the newer aluminum hubs?
I'm ordering new ones now but put it on hold until it is confirmed they fit the newer aluminum XFE spindles.

Thanks

 

[petethepug]

We narrowed down the terminology to hubs and knuckles. In which case all the hub assemblies on our 1/2 ton SUV are cast iron steel. The hubs are the assemblies with the studs anchored into them.

The knuckles are either aluminum or cast iron. Both versions bolt on to the cast iron steel hubs.

The difference between the alum & iron knucks is the holes where the LCA mount to them. Alum knucks have a larger diameter hole for a the larger ball joint that the Alum LCA have.

Yup, the aluminum and cast iron LCA both have different sized ball joints but, both the alum & cast iron UCA have the same size ball joints.

 

[992dr]

I get so confused with some of this terminology haha. And I always forget that it doesn't have spindles.
So, a Timken wheel bearing hub assembly for an 07/14 will bolt to the newer style aluminum knuckles?

 

[petethepug]

Correct.

Pretty sure the alum hub has a larger diameter tapered hole because it needs more material to have the same strength as the smaller iron hubs mount hole.

Oh yea, the tie rod end mount hole on the alum knuck is a different size too. It needs a 15-20 specific tie rod end from GM’s electric rack.

 

[petethepug]

Ordered a new OEM radiator, coolant reservoir and two new front hubs. Pretty sure the petcock on the OEM radiator is the source of the leak but at almost 190k on a likely OEM radiator, it’s due.

Found an interesting article on my preferred mfg for bearings, SKF. Turns out GM got together with them to create a better hub assembly for the 06-09 STS-V. They installed 6 lug hubs on a 4 door passenger car for a few years.

The technology bled over to the Escalade and is now known as a hybrid hub. Apparently it’s now used on the Escalade-V. No better time to replace them then when the front end is apart.

RockAuto has em for an unbelievable $139.79 ea.

X-TRACKER - Evolution

How asymmetrical hub bearing units improve high-performance car handling For high-performance cars,maintaining good handling characteristics under all conditions is important to the overall driving experience. SKF engineers provided an award-winning solution through the development of an...

evolution.skf.com

 

[Scrappycrow]

Ordered a new OEM radiator, coolant reservoir and two new front hubs. Pretty sure the petcock on the OEM radiator is the source of the leak...

From discussions here (e.g. this one and this one) and various YouTube videos, I was under the impression that our trucks' radiators didn't have petcocks (my '13 doesn't).

 

[91RS]

The factory radiator does not. If you have one, it’s an aftermarket radiator.

 

[mountie]

I have seen radiators with the location evidence, of where a petcock was, are now sealed by the manufacturer.