What ever happened to this thread https://www.performancetrucks.net/fo...6-lugs-528236/

Is this the rear that rated for 8k? Whats the weight difference between the two?

 

What models are these 9.5’s coming from? The vans? I remember the early 99-00 2500’s came with 9.5’s as well. And so did some suburbans

 

The ones I have are from a 06 express 1 ton

 

I believe most, if not all 1500 HD's had them.

 

No, that's a 2500 9.5 rear end. It will bolt in same on a 1500 but the perches are 1 inch taller.

The 9.5 - 8 lug and 6 lug axles use the same wheel bearings and seals. Doesn't matter OBS or NBS.

The Only 9.5 that is different is the AXN code optioned rear ends. They are a hybrid and use the 8.625 axle bearings and seals. as a result the axle shafts are smaller but still have a 33 spline axle.

 

Are these AXN Hybrid rears worth using ?
even with the smaller axles ?

 

Depends on what you want to do with it. They don't like wheel hop...

 

So looking for advice here because I am btw a rock and a hard place. So here are the specs.

My Vehicle: 2000 Chevy Silverado 1500 LS Z71 4x4 5.3L
eBay Axle: 2000 Chevy Silverado 2500LD 4x4 6.0L
Donor Junkyard Shafts: 95 Chevy Silverado 1500HD 4x4

I have vin's if needed. After swapping for long lug studs (and being past the return window from Rock Auto). I realize my donor shafts are 1/8" too short. The bearing journal diameter, spline count, length (so I thought) all matched up.

After the first test drive heard some rubbing. Pulled the shafts to find out the rotor is gouging into the backing plate, rotor is sitting off spaced in the caliper, as evidence by uneven wear, and the seal is riding up the flange.

So has anyone actually used jy shafts from a 90's GMT 400 or did everyone just think it would work in theory? Because I am really in a bad spot now. Think my only option is to call Dorman and have them make me shafts. Now I'm not sure what to tell them that I need.

Yes the donor shafts came from a 14 Bolt 9.5 and yes it was 4x4. What gives guys. Did the shafts vary in length throughout the years? What in the world am I missing?

 

You failed to mention what brake setup your working with.

I used new replacement shafts for the ones I have done. But in the past, I have only used 1500 Series GMT800 rear disc brakes with a custom made mounting flange.

 

I'm using the AC Delco rotors from a 2004 Chevy Express Van 2500 14 Bolt 9.5 7200 GVWR. Rotor hat height and diameter are same as the Silverado 2500LD. The loaded calipers are the stock 3/4 ton for the eBay axle I purchased. Which is a 2000 Chevy Silverado 2500LD 6.0L 4x4 14 Bolt 9.5

The problem is the shafts from the 2500 eBay axle are 33 5/16" long. The GMT 400 Z71 shafts are 33 3/16. There is no option for the length I need in the 6 x 5.5 bolt pattern I need with the right pilot size for the 6 lug rotors.

I haven't a clue how the people above did this swap. The rubbing off the rotor against the backing plate is obvious. The 33 5/16" length must just be an uncommon size for this.

I will be calling Dutchman tomorrow and asking if they can make a stock replacement for my eBay axle but with the hub of the GMT400/Z71. Will also be calling machine shops to see if they can modify my 8 lugs to 6 but that will be a ton of work. Hub diameter needs to go down from 7 7/8" to 7.5". Pilot diameter need to go down from 4.64" to 3.088" and the backside of the hub needs to be machined down on the bevel so to allow for the studs to press in for the 6 x 5.5 pattern instead of 8 x 6.5

This is a mess, beyond pissed that this didn't work. Probably going to drop over $300 for custom shafts tomorrow. Learn from my mistakes everyone.

As for your replacement shafts if you lucked out and have a GMT800 14 Bolt 9.5 that is the seemingly more common 33 3/16" axle shafts you can either look at Dutchman's site for stock replacement on a GMT400 with the 9.5. Or Rock Auto.

For the record here are the VIN's and make/model for my eBay axle and the junkyard donor shafts.

eBay axle: VIN# 1GCGK29U1YE374240
It's a 2000 Chevy Silverado 2500LD 6.0L 4x4 and has 33.31" axle shafts measured from outter edge of hub flange to c-clip end NOT AT AN ANGLE

Donor JY Shaft: VIN#2GCEK19S4S1118800
It's a '95 K1500HD 6.5L Diesel 4x4 and has the F44 Suspension package. Shaft length I measured at 33 3/16" but from looking up part numbers it's probably 33 1/4"

So your replacement part number is USA Standard Gear USA21425 on Rock Auto. This will not work for me because it is the 33.25" I assure you my problem is length related and not wrong brake part related. Yes clarify the rotor is rubbing from the inner ring of the parking brake surface side against the backing plate, not the pad surface. Guess I just got an odd ball length shaft in my eBay axle. Sure Dutchman will be able to set me straight, either way this sucks so much.