When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The bare minimum you need for this conversion are replacement axle shafts for an 88 to 98 Z71 9.5 inch axle, and brake rotor part number Delco 18A1753 or equivalent. Rear; with 7300lb GVW
You come out much cheaper doing it this way as opposed to trying to find a salvaged AXN axle. You also get larger axle tubes, larger wheel bearings, larger shafts, and the larger three-quarter ton brakes.
Last edited by 1FastBrick; 01-21-2019 at 12:00 PM.
Reason: added GVW for rear rotor spec
Keep in mind a regular GMT400 Z71 is going to have an 8.5" 10 bolt. It would need the F44 HD suspension package to have the 9.5" and not a lot of them had it. If someone orders axle shafts based on 88-98 Z71 they should be careful to look for the 9.5" in the description as it was definitely optional, most of 'em are 8.5". Or, order based on the light duty K2500 (6 lug, 7200 lb GVWR)
That's the rotor from a 2003-2005/6 Chevy Express/GMC Savana 2500 van, the 6 lug versions of those came with a 16" wheel. Dunno how close the factory wheel fits, aftermarket 16" wheel fitment could be another story depending on design.
That's the rotor from a 2003-2005/6 Chevy Express/GMC Savana 2500 van, the 6 lug versions of those came with a 16" wheel. Dunno how close the factory wheel fits, aftermarket 16" wheel fitment could be another story depending on design.
Richard
The 16 inch aluminum PYO rims are very close. I would suspect some aftermarket wheels you would need a 17.
17's are also a little more common in the after market.
Keep in mind a regular GMT400 Z71 is going to have an 8.5" 10 bolt. It would need the F44 HD suspension package to have the 9.5" and not a lot of them had it. If someone orders axle shafts based on 88-98 Z71 they should be careful to look for the 9.5" in the description as it was definitely optional, most of 'em are 8.5". Or, order based on the light duty K2500 (6 lug, 7200 lb GVWR)
Great swap!
Richard
Thanks! You are correct. I did mention that you have to specify the 9.5 inch axle.
Do you use wheel bearings/seals for the 88-98 truck you get the axle shafts from, or is all the 8 lug NBS stuff compatible with the OBS 6 lug axle shafts? The NBS semi-floater has the same pinion length and u-joint size as the quadrasteer dana 60 my Sierra has, this would be a great bolt in upgrade for me.
05-07-2018, 08:41 AM
GM 9.5" 8 Lug to 6 Lug Conversion
