Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rust-O-Matic · 12-04-2017, 12:15 AM

I'm looking to replace the Eaton HO52 in my '66 C20 with a newer axle with better gearing and parts availability. I found a 2002 "14 bolt", though I don't think that's the correct terminology for '01 and up, with disc brakes from a 2002 Chevy 2500, but I'm afraid it will be too wide to fit my stock type steel wheels inside the wheelwells. The seller measured "around 67-68 inches" from outside or rotor to outside of rotor, and I have read that my HO52 should only be about 65.5" the tires are currently about 1.5" from the wheel well lip, so I'm concerned they would rub.

Has anyone done this swap before? Any idea if it will work?

PS, I'm aware the perches, etc. will need to be modified. I'm just concerned with the width.

rvrfoot · 12-04-2017, 01:41 AM

Look in the search there may be some info in there.

Rust-O-Matic · 12-04-2017, 02:03 AM

What a novel idea. I'm forever in debt to your priceless advice.

I searched all afternoon/evening; this forum, others, google, the 14 bolt bible. There dosent seem to be alot of info available on the '01 and newer full floaters, and some sites show conflicting info on widths and specifics. I am hoping someone who actually has experience with these specific parts can weigh in.

There is a very good writeup on here about a similar swap, but his measured narrower than the axle I'm lookin at, and I believe it was from a 1 ton.

**Clyde65** · 12-04-2017, 07:43 PM

Also remember that the 2002 wheels were negative offset, meaning the wheel mounting surface was further out than most other rear ends. Good luck with whatever you decide.

Rust-O-Matic · 12-06-2017, 05:31 PM

Thanks for the input, Clyde. After much Google-Fu and measuring, I decided to pass on the '02 axle and look for a narrower '88-'00 version.

**The Rocknrod** · 12-06-2017, 06:07 PM

I used the search at the top of the page:
http://67-72chevytrucks.com/vboard/s...30&postcount=7
http://67-72chevytrucks.com/vboard/s...42&postcount=6

Rust-O-Matic · 12-07-2017, 01:44 AM

Those links appear to be about 1/2 ton axles and don't contain any info about the AAW 10.5" full floater in question, or 14 bolts in general.

12-04-2017, 12:15 AM	#1
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? I'm looking to replace the Eaton HO52 in my '66 C20 with a newer axle with better gearing and parts availability. I found a 2002 "14 bolt", though I don't think that's the correct terminology for '01 and up, with disc brakes from a 2002 Chevy 2500, but I'm afraid it will be too wide to fit my stock type steel wheels inside the wheelwells. The seller measured "around 67-68 inches" from outside or rotor to outside of rotor, and I have read that my HO52 should only be about 65.5" the tires are currently about 1.5" from the wheel well lip, so I'm concerned they would rub. Has anyone done this swap before? Any idea if it will work? PS, I'm aware the perches, etc. will need to be modified. I'm just concerned with the width.

12-04-2017, 01:41 AM	#2
rvrfoot Registered User Join Date: Oct 2016 Location: san bernardino ca Posts: 1,611	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? Look in the search there may be some info in there.

12-04-2017, 02:03 AM	#3
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? What a novel idea. I'm forever in debt to your priceless advice. I searched all afternoon/evening; this forum, others, google, the 14 bolt bible. There dosent seem to be alot of info available on the '01 and newer full floaters, and some sites show conflicting info on widths and specifics. I am hoping someone who actually has experience with these specific parts can weigh in. There is a very good writeup on here about a similar swap, but his measured narrower than the axle I'm lookin at, and I believe it was from a 1 ton.

12-04-2017, 07:43 PM	#4
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? Also remember that the 2002 wheels were negative offset, meaning the wheel mounting surface was further out than most other rear ends. Good luck with whatever you decide. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

12-06-2017, 05:31 PM	#5
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? Thanks for the input, Clyde. After much Google-Fu and measuring, I decided to pass on the '02 axle and look for a narrower '88-'00 version.

12-06-2017, 06:07 PM	#6
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? I used the search at the top of the page: http://67-72chevytrucks.com/vboard/s...30&postcount=7 http://67-72chevytrucks.com/vboard/s...42&postcount=6 __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

12-07-2017, 01:44 AM	#7
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Re: Is an AAM 10.5" rear end from a 2002 Chevy too wide for my fleetside '66 C20? Those links appear to be about 1/2 ton axles and don't contain any info about the AAW 10.5" full floater in question, or 14 bolts in general.



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