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06-16-2007, 08:51 PM
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#1 |
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Registered User
Join Date: Apr 2006
Location: MEMPHIS,TN
Posts: 18
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Help with rear axle code
Rear axle code on right passenger side says RHA W330 1; what is the rear axle ratio for this code???
__________________
1969 C10 Long Wheel Base 1985 Monte Carlo SS(Snake Charmer) 
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06-17-2007, 11:00 AM
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#2 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Help with rear axle code
that is a 1972 3:07 ratio..
Here is a link.. srcoll down to axle codes and click on year http://www.americanclassic.com/paint.htm?p1=axles Last edited by Livrat; 06-17-2007 at 11:01 AM. |
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07-14-2011, 08:16 AM
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#3 |
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Registered User
Join Date: Apr 2010
Location: memphis TN
Posts: 49
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Re: Help with rear axle code
I need this info but the link is dead now....arrrgh!!!!!
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07-14-2011, 08:21 AM
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#4 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Help with rear axle code
a code that was stamped 40years ago is not always what is inside now alot of times// a simple rear fluid change will give you a foolproof answer
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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07-14-2011, 08:31 AM
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#5 |
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Registered User
Join Date: Apr 2010
Location: memphis TN
Posts: 49
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Re: Help with rear axle code
True enough, I am pretty sure this is an unmolested truck though, as far as the rear axle. I plan to pull the cover soon and change gear oil but I have a lot to get done before I get around to it. I really would like to find a ratio code chart.
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07-14-2011, 11:31 AM
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#6 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Help with rear axle code
Yes that site is dead, I now have an interchange manual that lists the codes, post up your axle code and I can tell you what it originally was
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07-14-2011, 12:03 PM
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#7 |
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Registered User
Join Date: Apr 2010
Location: memphis TN
Posts: 49
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Re: Help with rear axle code
Its a 70 pickup TDA. I found another post after I did a search that said it is a 3.73. Im guessing its an open (peg leg)
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07-14-2011, 12:26 PM
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#8 |
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Registered User
 
Join Date: Sep 2001
Location: Fort Wayne, Indiana, USA
Posts: 1,890
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Re: Help with rear axle code
You are both correct, the GM parts manual says that is a 1072 3.07 (open) for CS/CE, and the same stamp was used in 1970 for a 3.73 (open). Therefore, if it is a 6-lug, it's probably the 3.73 and if it is a 5-lug it's probably a 3.07.
Good Luck!! |
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07-14-2011, 12:29 PM
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#9 |
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Registered User
Join Date: Apr 2010
Location: memphis TN
Posts: 49
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Re: Help with rear axle code
It is a 6 lug, 3.73 should be nice with my overdrive. Thank you!
Posted via Mobile Device |
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07-14-2011, 10:12 PM
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#10 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Help with rear axle code
My Hollander interchange manual lists it as a 70 3:73 open.
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11-03-2011, 03:16 PM
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#11 |
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Registered User
Join Date: Sep 2007
Location: Riverside, CA
Posts: 4,316
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Re: Help with rear axle code
any help with a 72 rearend stamped RHC W126 1 Thanks in advance...
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11-03-2011, 03:29 PM
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#12 |
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Registered User
Join Date: Dec 2009
Location: Rancho Cordova, CA
Posts: 274
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Re: Help with rear axle code
[QUOTE= a simple rear fluid change will give you a foolproof answer[/QUOTE]
Please explain, what would one look for? |
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11-03-2011, 03:33 PM
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#13 |
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Registered User
Join Date: Sep 2001
Location: Fort Wayne, Indiana, USA
Posts: 1,890
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Re: Help with rear axle code
Book says 1972 3.73 open (non-posi).
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11-03-2011, 03:36 PM
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#14 |
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Florida Edition
 
Join Date: Oct 2010
Location: Fruitland Park, FL
Posts: 4,034
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Re: Help with rear axle code
Here is what was stamped on mine...
It's a 3:07 Posi now 
__________________
70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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11-03-2011, 03:53 PM
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#15 | |
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Registered User
Join Date: Sep 2007
Location: Riverside, CA
Posts: 4,316
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Re: Help with rear axle code
Great thanks...just wanted an idea before I popped to take a look...
Quote:
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04-08-2012, 01:10 PM
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#16 |
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Registered User
Join Date: Jan 2008
Location: Murfreesboro, TN
Posts: 33
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Re: Help with rear axle code
Need a bit of help, have a 1970 C-10 that I have reason to believe was swapped to a 71 Frame, dash sheet says automatic & had to cut a bellhousing crossmember out that was riveted in, disc brakes, and rear lug studs for a 70 didn't fit but 71's did, as well as a 71 type grill, & am noticing looseness in the rear end, anyway it is 5 lug with coils and the number on pumpkin is 3896838 and code on tube is RHA W143 1
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09-01-2012, 09:37 PM
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#17 |
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Registered User
Join Date: Dec 2010
Location: NC
Posts: 666
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Re: Help with rear axle code
Bump. I have a 72 with rha code. Hoping someone has a definitive source.
Posted via Mobile Device |
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09-01-2012, 10:08 PM
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#18 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Help with rear axle code
RHA= 1972, 3:07 ratio (Source: Hollander interchange manual)
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09-01-2012, 10:11 PM
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#19 | |
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Registered User
Join Date: Dec 2010
Location: NC
Posts: 666
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Re: Help with rear axle code
Quote:
Posted via Mobile Device |
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09-02-2012, 02:53 AM
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#20 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,507
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Re: Help with rear axle code
RHA, '72 CS/CE10 3.07:1 Chevrolet Parts Manual
__________________
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 |
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09-28-2012, 02:11 PM
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#21 |
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Registered User
Join Date: May 2011
Location: San Jose, Ca
Posts: 45
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Re: Help with rear axle code
How about this one?
RA 0208 W2 |
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09-28-2012, 02:25 PM
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#22 |
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Registered User
Join Date: Sep 2001
Location: Fort Wayne, Indiana, USA
Posts: 1,890
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Re: Help with rear axle code
Both 68 and 69 used RA for the 3.07 open for a Series 10.
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09-28-2012, 03:09 PM
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#23 | |
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Registered User
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,984
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Re: Help with rear axle code
Quote:
 . These numbers indicate the number of teeth on the pinion and the ring gear.For example, mine is stamped 11:41. 41 divided by 11 equals 3.7272, so it's a 3.71:1 gear ration |
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09-28-2012, 10:22 PM
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#24 | |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,507
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Re: Help with rear axle code
Quote:
__________________
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; 09-28-2012 at 10:30 PM. |
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09-28-2012, 11:48 PM
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#25 |
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Registered User
Join Date: Apr 2010
Location: memphis TN
Posts: 49
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Re: Help with rear axle code
Gmpartswiki.com will answer all your decoding questions.
Posted via Mobile Device
__________________
70 Chevy Custom 10 400SB, Tremec TKO600, 3.73 posi. LWB hope to chop frame and have it short soon! 71 GMC LWB in the works of getting going for the first time since 1996 |
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