Full Floating Axle and Ring Gear, How to tell?

[Fuddrucker]

Does any one know how I can tell if I have a full floating or semi floating axle? I also need to figure out if I have 10.5 ring gear, or 11.5 ring gear. I want to get a new Mag-Hytec diff. cover and there are two choices for the 14 bolt.

 

I have an 03 Chevy 2500HD, 6.0 gaser, 4L80E tranny, 8 lug wheels.

 

Thanks

[Heavy Duty]

I believe all you have to do is pull off one of the rear center caps on the wheels. A full floater will have a bunch of bolts in a circle holding the axle in. I dont think the semi floaters have that.

[Hecktorx]

There are actually three 14 bolts made by GM. The only semi-floater is the 9.5". You should have the 10.5". I'm pretty sure you only get the 11" on with the 8.1l or the 6.6l.

 

Kenny

[Colorado Kid]

Yup, you've got old reliable, the 10.5" full-floater 14-bolt.

 

All 6.0 liter 2500HD, 3500, 2500 and 1500HDs use that axel, and so do a whole bunch of older 3/4 tons and 1 tons (not all of them, but most of them), all the way back to my '74 C2500 454.

 

8.1L and Duramax 2500HD and 3500 use the 11.5" full floater 14-bolt.

[Fuddrucker]

Thanks for the replys. I took of a wheel and it is the full floater and I will go with the 10.5 ring gear for my order.

 

Thanks again!