Need measurement for 12 bolt axle length. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

REPO1 · 10-07-2003, 12:02 PM

Can someone give me the total length of a 12 bolt axle from the outside edge of the flange to the very end of the shaft?

I am hoping to convert my '70 6 lug axles over to 5 lugs. I am planning on searching the wrecking yard, but need to know the length.

Thanks!

crazy4chevs · 10-07-2003, 01:37 PM

I just put my axles back in last night, too bad this wasnt posted yesterday. I am shure somone has to know though.

REPO1 · 10-07-2003, 01:52 PM

You wouldn't by chance have the old 6 lug axles to measure would ya?

crazy4chevs · 10-07-2003, 02:27 PM

mine is a 71-2 i just had the axles out to work on it.

crazy4chevs · 10-07-2003, 02:44 PM

I do have a set of 6 lug axles that are out, they were out of a 68 i can measure them if that would help.

REPO1 · 10-07-2003, 04:38 PM

They should be the same length. Nothing later than '72 will fit though.

jmanz69 · 10-07-2003, 04:42 PM

There are 2 different lengths in our trucks. They switched over in mid-70. You could have either axle. You really should measure yours to be sure. The 71-72 are longer then the 67-early 70 axles. Make sure you get the right one... I have both in my garage right now. The housings are different lengths. I will measure the 71-72 axle and post it for you.

REPO1 · 10-07-2003, 04:45 PM

The rear I have right now is a '70 model. Wouldn't the '68 axles be the same length?

**StingRay** · 10-07-2003, 04:52 PM

70 could use either the early or late width of housing. So far at least all of the 70 housings I have found up here in Canada have used the late width and have accepted the 71 and up 5 lug axles

jmanz69 · 10-07-2003, 05:04 PM

my 71-72 axle length is 31 3/8 from spline end to the outside of the flange. They might or might not be the same. You will have to measure your housing. Measure from the inside of the backing plate flanges across. The 71-72 housings are 58 between there. the others are around 54 I think. I am looking myself for a 5 lug 71-72 axle as one of mine was frozen and the bearing surface was all pitted.

REPO1 · 10-07-2003, 05:27 PM

Quote:

Originally posted by jmanz69
my 71-72 axle length is 31 3/8 from spline end to the outside of the flange. They might or might not be the same.

I hope that is what they are, as I already have 1 axle of the same length. I hope to have the 6 lug axles out this weekend.

10-07-2003, 12:02 PM	#1
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	Need measurement for 12 bolt axle length. Can someone give me the total length of a 12 bolt axle from the outside edge of the flange to the very end of the shaft? I am hoping to convert my '70 6 lug axles over to 5 lugs. I am planning on searching the wrecking yard, but need to know the length. Thanks! __________________ 1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH)

10-07-2003, 01:37 PM	#2
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	I just put my axles back in last night, too bad this wasnt posted yesterday. I am shure somone has to know though. __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington .

10-07-2003, 02:27 PM	#4
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	mine is a 71-2 i just had the axles out to work on it. __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington .

10-07-2003, 02:44 PM	#5
crazy4chevs Registered User Join Date: Oct 2002 Location: Des Moines WA. (Kent, area) Posts: 668	I do have a set of 6 lug axles that are out, they were out of a 68 i can measure them if that would help. __________________ 70 chev c10 swb fleet 72 grill, sb 400, 2/4 drop. 68 chev c10 swb fleet Early classic 4/6 drop with 4wheel disc brakes 9"rear 67-8 buckets tilt and A/C Classic GM Truck Club of Washington .

10-07-2003, 04:52 PM	#9
StingRay Senior Member Join Date: Mar 2000 Location: Saskatoon,SK,Canada Posts: 2,476	70 could use either the early or late width of housing. So far at least all of the 70 housings I have found up here in Canada have used the late width and have accepted the 71 and up 5 lug axles __________________ Saskatoon, Saskatchewan Canada

10-07-2003, 01:52 PM	#3
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	You wouldn't by chance have the old 6 lug axles to measure would ya?

10-07-2003, 04:38 PM	#6
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	They should be the same length. Nothing later than '72 will fit though.

10-07-2003, 04:42 PM	#7
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	There are 2 different lengths in our trucks. They switched over in mid-70. You could have either axle. You really should measure yours to be sure. The 71-72 are longer then the 67-early 70 axles. Make sure you get the right one... I have both in my garage right now. The housings are different lengths. I will measure the 71-72 axle and post it for you.

10-07-2003, 04:45 PM	#8
REPO1 Shortbox wanna-be. Join Date: Mar 2002 Location: Fort St.John, British Columbia, Canada Posts: 773	The rear I have right now is a '70 model. Wouldn't the '68 axles be the same length?

10-07-2003, 05:04 PM	#10
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	my 71-72 axle length is 31 3/8 from spline end to the outside of the flange. They might or might not be the same. You will have to measure your housing. Measure from the inside of the backing plate flanges across. The 71-72 housings are 58 between there. the others are around 54 I think. I am looking myself for a 5 lug 71-72 axle as one of mine was frozen and the bearing surface was all pitted.



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