Numbers on Rear Axle - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wxman1 · 07-14-2003, 09:13 PM

I'm trying to determine the kind of rear axle I've got on my truck.
The truck VIN decodes to a 69 C10 1/2 ton P/U with the V-8 motor.
However the frame was cut just behind the cab and a different frame welded
on. The numbers on the rear axle are GM58 and NF 3896839. Does this give
anybody a clue as to what kind of truck it may have come from??
I know what the ratio is, 3.73, since it was stamped on the ring gear
when I took the cover plate off to drain the fluid.

Bye the way, I went to driveline.com and none of the above numbers
match anything on their web pages.

Thanks!
Jim M.
Mt Juliet

Blue Beard · 07-14-2003, 09:40 PM

You might try GMC Pauls for the information.

wxman1 · 07-15-2003, 10:13 AM

ttt

**CPNE** · 07-15-2003, 11:17 AM

The #'s you need to post are on the axle tube and have the pattern XXX nnn, where XXX is the key to decode your rear, nnn is the julian date of assembly. I found mine on the top passenger side. These #'s are stamped, not cast, and are very had to find, especially if rusty

Though this is for car axles, it'll give you an idea as to what stamping to look for.

07-14-2003, 09:13 PM	#1
wxman1 Senior Member Join Date: May 2002 Location: mt juliet, tennessee, usa Posts: 237	Numbers on Rear Axle I'm trying to determine the kind of rear axle I've got on my truck. The truck VIN decodes to a 69 C10 1/2 ton P/U with the V-8 motor. However the frame was cut just behind the cab and a different frame welded on. The numbers on the rear axle are GM58 and NF 3896839. Does this give anybody a clue as to what kind of truck it may have come from?? I know what the ratio is, 3.73, since it was stamped on the ring gear when I took the cover plate off to drain the fluid. Bye the way, I went to driveline.com and none of the above numbers match anything on their web pages. Thanks! Jim M. Mt Juliet

07-14-2003, 09:40 PM	#2
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	You might try GMC Pauls for the information. __________________ 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

07-15-2003, 11:17 AM	#4
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	The #'s you need to post are on the axle tube and have the pattern XXX nnn, where XXX is the key to decode your rear, nnn is the julian date of assembly. I found mine on the top passenger side. These #'s are stamped, not cast, and are very had to find, especially if rusty Though this is for car axles, it'll give you an idea as to what stamping to look for. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

07-15-2003, 10:13 AM	#3
wxman1 Senior Member Join Date: May 2002 Location: mt juliet, tennessee, usa Posts: 237	ttt



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