Differential code - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**425HP409** · 08-20-2010, 03:53 PM

I need someone to tell me what the code RHC is on a 72 truck that I can't roll to get the ratio from the gears.

**john** · 08-20-2010, 04:21 PM

Rhc = 3.73:1

**425HP409** · 08-20-2010, 04:52 PM

Thanks John. I thought that was it but wasn't sure. Now I can go ahead and pull the diff as I have it sold.
Charles

08-20-2010, 03:53 PM	#1
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 841	Differential code I need someone to tell me what the code RHC is on a 72 truck that I can't roll to get the ratio from the gears. __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette

08-20-2010, 04:21 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Differential code Rhc = 3.73:1 __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 08-20-2010 at 04:32 PM.

08-20-2010, 04:52 PM	#3
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 841	Re: Differential code Thanks John. I thought that was it but wasn't sure. Now I can go ahead and pull the diff as I have it sold. Charles __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette



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