Axle widths? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shawno72 · 10-12-2012, 12:14 PM

Can someone please tell me the two different axle widths from backing plate to backing plate on the early 69 and the late 69 axles? Thank you in advance.

s_nova69 · 10-12-2012, 10:20 PM

I believe that 67-70 12 bolts r the sAme width. The change came in 71 when they switched to 5 lug. Those r 1.5" wider than the six lug version

A quick measurement on the chassis in the garage is 58" and that is a 5 lug. So a six lug pre 71 would be 56.5 ".

Ask me how I know the difference
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shawno72 · 10-12-2012, 10:47 PM

Ok how do you know the difference

thank you for the numbers.
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weaintscared · 10-12-2012, 11:07 PM

67-69 and some of the 70's are 1.5" shorter than the 71-72 the 67-70 will be 6 lug but axle is still the same length thee later 70's are the wider ones like the 71-72 are.. I just went through this.. I've got a 69 6 lug truck that I'm putting a 71-72 5 lug into.

We ain't scared,,,, Build thread,,,

http://67-72chevytrucks.com/vboard/s...d.php?t=468622
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SS Tim · 10-13-2012, 12:43 AM

Here are the axle part numbers covering "C","K" and "G" trucks. Gives a lot of information and shaft lengths/spline counts to match up those sitting unknown in the corner.

Looks like the '70 C10s with disc brakes without the 4 speed or 396 were equipped with the wider 71-72 5-lug axle.

c10srule · 10-13-2012, 12:45 AM

my 70 had the wider axle, all you have to do is change the shafts from a 5 lug axle to convert it not the whole axle, if you have a bad shaft and want to keep it 6 lug you can get one out of a 4x4 from the seventys and use it,

s_nova69 · 10-13-2012, 02:32 AM

So a few days before the autorama that my chassis was entered in I got my axles that I ordered new for a 72. I had done lots of work on the rear by adding sway bar mounts and disc brake stuff. I then had it powder coated with everything else. So when I put the new 72 axles in they stuck out oh about .75". I was very mad and confused. I was able to locate a 72 12 bolt that day and got it repowdercoated and made the show. I still have the 68 diff that is all powder coated in my garage that will never get used.

That is how I found out.
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s_nova69 · 10-13-2012, 02:34 AM

I got second in my class behind my friends 32 ford chassis that had 25k invested
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10-12-2012, 12:14 PM	#1
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Axle widths? Can someone please tell me the two different axle widths from backing plate to backing plate on the early 69 and the late 69 axles? Thank you in advance. __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

10-12-2012, 10:20 PM	#2
s_nova69 Registered User Join Date: Jul 2007 Location: slc, ut Posts: 318	Re: Axle widths? I believe that 67-70 12 bolts r the sAme width. The change came in 71 when they switched to 5 lug. Those r 1.5" wider than the six lug version A quick measurement on the chassis in the garage is 58" and that is a 5 lug. So a six lug pre 71 would be 56.5 ". Ask me how I know the difference Posted via Mobile Device __________________ Phil '70 Longhorn 421 700r4 tach 4 wheel disc hydroboost daily driver '72 short super build 4wd '72 Suburban LT4 coming soon!!

10-12-2012, 10:47 PM	#3
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Re: Axle widths? Ok how do you know the difference thank you for the numbers. Posted via Mobile Device __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

10-12-2012, 11:07 PM	#4
weaintscared Registered User Join Date: Mar 2011 Location: Sumter SC Posts: 439	Re: Axle widths? 67-69 and some of the 70's are 1.5" shorter than the 71-72 the 67-70 will be 6 lug but axle is still the same length thee later 70's are the wider ones like the 71-72 are.. I just went through this.. I've got a 69 6 lug truck that I'm putting a 71-72 5 lug into. We ain't scared,,,, Build thread,,, http://67-72chevytrucks.com/vboard/s...d.php?t=468622 Posted via Mobile Device

10-13-2012, 12:43 AM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Axle widths? Here are the axle part numbers covering "C","K" and "G" trucks. Gives a lot of information and shaft lengths/spline counts to match up those sitting unknown in the corner. Looks like the '70 C10s with disc brakes without the 4 speed or 396 were equipped with the wider 71-72 5-lug axle. Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 10-13-2012 at 12:51 AM.

10-13-2012, 12:45 AM	#6
c10srule Registered User Join Date: Oct 2012 Location: oran,mo. Posts: 171	Re: Axle widths? my 70 had the wider axle, all you have to do is change the shafts from a 5 lug axle to convert it not the whole axle, if you have a bad shaft and want to keep it 6 lug you can get one out of a 4x4 from the seventys and use it,

10-13-2012, 02:32 AM	#7
s_nova69 Registered User Join Date: Jul 2007 Location: slc, ut Posts: 318	Re: Axle widths? So a few days before the autorama that my chassis was entered in I got my axles that I ordered new for a 72. I had done lots of work on the rear by adding sway bar mounts and disc brake stuff. I then had it powder coated with everything else. So when I put the new 72 axles in they stuck out oh about .75". I was very mad and confused. I was able to locate a 72 12 bolt that day and got it repowdercoated and made the show. I still have the 68 diff that is all powder coated in my garage that will never get used. That is how I found out. Posted via Mobile Device __________________ Phil '70 Longhorn 421 700r4 tach 4 wheel disc hydroboost daily driver '72 short super build 4wd '72 Suburban LT4 coming soon!!

10-13-2012, 02:34 AM	#8
s_nova69 Registered User Join Date: Jul 2007 Location: slc, ut Posts: 318	Re: Axle widths? I got second in my class behind my friends 32 ford chassis that had 25k invested Posted via Mobile Device __________________ Phil '70 Longhorn 421 700r4 tach 4 wheel disc hydroboost daily driver '72 short super build 4wd '72 Suburban LT4 coming soon!!



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