Rear Axle I.D. Confusion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMC_Aaron · 01-26-2004, 05:38 AM

I was trying to pull the axle codes the other day, because I need to change the cover gasket. I have read about casting locations and couldn't find the code that is supposed to be on the passenger side of the rear axle. What gives? I was able to pull a couple of numbers off the axle. One was on the carrier itself, passenger side, facing towards the front and it read GM 30. The other number I found was on the driver's side axle tube, facing towards the front. Will these numbers tell me anything? I'm thinking that this rear axle isn't the original.

Blue Beard · 01-26-2004, 09:38 AM

I've had the same issue........can't find any numbers.....

GMC_Aaron · 01-26-2004, 11:30 AM

The number I found on the left side as described above is: 1405525.

69k5 · 01-26-2004, 03:36 PM

Quote:

Originally posted by GMC_Aaron
The number I found on the left side as described above is: 1405525.

95 percent sure thats the same number thats on my 12 bolt. if its not a 3rd member (gears ubolt and drop out the front) then count the bolts . its either 10 12 or 14.

69k5

GMC_Aaron · 01-26-2004, 05:41 PM

Mine is a 10 bolt. I'm not seasoned on rear ends yet, but I have a posi that I would like to throw in if possible. I just wanted to figure out what rear end I had before I tear into it. I have searched all over the web with these 2 casting numbers and have had no luck.

01-26-2004, 05:38 AM	#1
GMC_Aaron Registered User Join Date: Jul 2002 Location: Ventura, Ca. Posts: 87	Rear Axle I.D. Confusion I was trying to pull the axle codes the other day, because I need to change the cover gasket. I have read about casting locations and couldn't find the code that is supposed to be on the passenger side of the rear axle. What gives? I was able to pull a couple of numbers off the axle. One was on the carrier itself, passenger side, facing towards the front and it read GM 30. The other number I found was on the driver's side axle tube, facing towards the front. Will these numbers tell me anything? I'm thinking that this rear axle isn't the original. __________________ Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400

01-26-2004, 09:38 AM	#2
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	I've had the same issue........can't find any numbers..... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

01-26-2004, 11:30 AM	#3
GMC_Aaron Registered User Join Date: Jul 2002 Location: Ventura, Ca. Posts: 87	The number I found on the left side as described above is: 1405525. __________________ Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400

01-26-2004, 05:41 PM	#5
GMC_Aaron Registered User Join Date: Jul 2002 Location: Ventura, Ca. Posts: 87	Mine is a 10 bolt. I'm not seasoned on rear ends yet, but I have a posi that I would like to throw in if possible. I just wanted to figure out what rear end I had before I tear into it. I have searched all over the web with these 2 casting numbers and have had no luck. __________________ Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400



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