Can someone ID my axle code? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sklptrljay · 05-23-2012, 09:16 PM

I have a 71 half ton with a 12 bolt. I looked everywhere but I don't see an answer for my code. It's: THA W153.

Thanks for any help.

Sklptrljay · 05-24-2012, 01:43 AM

Can anyone identify my gear ratio?

It's a 1971 12 bolt.

The code on the rear passenger side tube reads: THA W153

SS Tim · 05-24-2012, 02:37 AM

T..'71?, HA..3.73 open, W..Warren MI plant, 153..153rd day of the year How does that match up to what you think you have?

Sklptrljay · 05-24-2012, 08:55 AM

HA = 3.73?

That would be awesome!

I just bought this 71 for a parts truck for $500, and I'm doing a 6 to 5 lug conversion on my 70. I just crossed my fingers when I bought the 71, but 3.73 is exactly what I wanted.

I will open the case when I pull it to confirm.

05-23-2012, 09:16 PM	#1
Sklptrljay Registered User Join Date: Apr 2012 Location: Stillwater, Oklahoma Posts: 874	Can someone ID my axle code? I have a 71 half ton with a 12 bolt. I looked everywhere but I don't see an answer for my code. It's: THA W153. Thanks for any help.

05-24-2012, 01:43 AM	#2
Sklptrljay Registered User Join Date: Apr 2012 Location: Stillwater, Oklahoma Posts: 874	Anybody able to ID my rear gear ratio? Can anyone identify my gear ratio? It's a 1971 12 bolt. The code on the rear passenger side tube reads: THA W153

05-24-2012, 02:37 AM	#3
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Can someone ID my axle code? T..'71?, HA..3.73 open, W..Warren MI plant, 153..153rd day of the year How does that match up to what you think you have? __________________ 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

05-24-2012, 08:55 AM	#4
Sklptrljay Registered User Join Date: Apr 2012 Location: Stillwater, Oklahoma Posts: 874	Re: Can someone ID my axle code? HA = 3.73? That would be awesome! I just bought this 71 for a parts truck for $500, and I'm doing a 6 to 5 lug conversion on my 70. I just crossed my fingers when I bought the 71, but 3.73 is exactly what I wanted. I will open the case when I pull it to confirm.

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