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02-12-2010, 12:24 PM
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#1 |
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Registered User
Join Date: May 2008
Location: Mtn. Grove Mo.
Posts: 155
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Axle codes
Does anyone know any where that and decode the codes on the axle tube? thanks
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DJ |
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02-12-2010, 05:28 PM
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#2 |
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member #16
 
Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: Axle codes
post the numbers and we will decode them.
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors  http://www.flickr.com/photos/1745471...7602865984234/ |
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02-13-2010, 11:24 AM
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#3 |
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Registered User
Join Date: May 2008
Location: Mtn. Grove Mo.
Posts: 155
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Re: Axle codes
do you need just the letters or the whole code?
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DJ |
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02-13-2010, 01:11 PM
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#4 |
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member #16
Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: Axle codes
Just the two or three digit letters
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ |
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02-13-2010, 02:33 PM
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#5 |
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Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: Axle codes
My axle code was three letters TDE (3.07:1). Some are two letters like HB, LL, RA HJ, MK etc. etc. Found on the top of the passenger side axle tube about 6" from differential center housing.
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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02-13-2010, 04:46 PM
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#6 |
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Registered User
Join Date: May 2008
Location: Mtn. Grove Mo.
Posts: 155
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Re: Axle codes
i've got 3 codes, (2) ha, rha
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DJ |
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02-13-2010, 06:16 PM
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#7 |
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Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: Axle codes
I think that the HA code for a 1972 was a 3.73 ratio whereas RHA was a 3.07 for 1972 based on old posts ONLY. I can not find a chart. GMC Paul's site has some codes for 67 and 68 but not later years. Someone will come up with a definite answer for you.
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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02-13-2010, 08:35 PM
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#8 |
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member #16
Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: Axle codes
For HA i Have 1967 3.:73-1
RHA 1972 3.07:1
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ |
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02-13-2010, 09:50 PM
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#9 |
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Registered User
Join Date: May 2008
Location: Mtn. Grove Mo.
Posts: 155
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Re: Axle codes
the h.a. codes are out of a 67 and a 68 and the rha is out of a 72. so that sounds good. how do u guys think the 3.07 gears will do behind a 283 with a mild cam and a saginaw 4 speed? thanks again.
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02-01-2011, 03:21 PM
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#10 |
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Registered User
Join Date: Dec 2003
Location: Nashville
Posts: 48
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Re: Axle codes
I'm still trying to figure mine out so I can order a differential kit to replace all the bearings. I have a '72 1/2 ton and the axle housing code is RHA W155 1. I'm guessing it's a 3.07 but not sure. I'm thinking I can jack up one side and count drive shaft revolutions per one full turn of the rear wheel, as opposed to pulling the differential cover and counting teeth. It would seem there are no good decoding charts available for these trucks. I've got a couple of excellent "Chevrolet by the Numbers" books, but they are mainly for cars...truck codes are not listed. Any other suggestions?
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Larry 72 Cheyenne LWB Fleetside Oak Bed 350 w/ TH400 (finally complete!). 69 Chevy C-10 LWB 350 w/ TH350 (good 'ol rusty bullet proof dependable hauler). 02 Suburban Z71 4x4 (wife's driver). |
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