co-worker looking for 373 posi - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nu2-72 · 11-13-2001, 09:05 PM

Bill has a 1985 ElCamino and is looking for a 373 Posi for it. Tells me a rearend from a Monte SS is direct fit. Anyone know for sure and if anything else fits? Any for sale in Kansas City area?

*big ugly K-5* · 11-15-2001, 01:17 PM

Montes didnt use 3.73 posi, his best bet would be for a T/R or Regal or other G-body car thta got the posi and lower gears and the larger ring gear(8.5").

Theres a web site I forgot name of it now, but its huge and has all codes and ratios and all models of G body cars, and all the RPO codes for the installed ratios for the trunk decklid sticker.

El camino are A -body, but stil use the G body suspension in most cases. '78-87 are all bolt in replacment, nothing changed in these years.

G body axle stamping codes(found on axle tube:
http://www.gnttype.org/numbers/axcodes.html

Axle RPO codes found on trunk decklid label sticker: http://www.gnttype.org/numbers/rpo.html

go down to the bottom of the page, the G codes are axle ratio codes. For example, GU6 found on the lable is 3.42 ratio

[This message has been edited by big ugly K-5 (edited 11-15-2001).]

[This message has been edited by big ugly K-5 (edited 11-15-2001).]

nu2-72 · 11-15-2001, 08:03 PM

Thanks for the info. I will let him know.

11-13-2001, 09:05 PM	#1
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	co-worker looking for 373 posi Bill has a 1985 ElCamino and is looking for a 373 Posi for it. Tells me a rearend from a Monte SS is direct fit. Anyone know for sure and if anything else fits? Any for sale in Kansas City area? __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

11-15-2001, 08:03 PM	#3
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	Thanks for the info. I will let him know. __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

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11-15-2001, 01:17 PM	#2
big ugly K-5 Account Suspended Join Date: Feb 2001 Location: IL Posts: 124	Montes didnt use 3.73 posi, his best bet would be for a T/R or Regal or other G-body car thta got the posi and lower gears and the larger ring gear(8.5"). Theres a web site I forgot name of it now, but its huge and has all codes and ratios and all models of G body cars, and all the RPO codes for the installed ratios for the trunk decklid sticker. El camino are A -body, but stil use the G body suspension in most cases. '78-87 are all bolt in replacment, nothing changed in these years. G body axle stamping codes(found on axle tube: http://www.gnttype.org/numbers/axcodes.html Axle RPO codes found on trunk decklid label sticker: http://www.gnttype.org/numbers/rpo.html go down to the bottom of the page, the G codes are axle ratio codes. For example, GU6 found on the lable is 3.42 ratio [This message has been edited by big ugly K-5 (edited 11-15-2001).] [This message has been edited by big ugly K-5 (edited 11-15-2001).]



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