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Using an electronic speedo with TBI and 700R4?

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08-09-2010, 10:22 AM

#18

mcbassin

Still Learning

Join Date: Jul 2009

Location: Central Oklahoma

Posts: 10,108

Re: Using an electronic speedo with TBI and 700R4?

Quote:

Originally Posted by ChevyTech

Great photo of the DRAC jumpers mcbassin.

This looks to me to be a DRAC from a vehicle with a 3.42 axle ratio and P225/75R15 tires.

A 3.42 axle ratio would have an RPO code of GU6

If you find out what axle ratio the truck has, or get me the PRO code from the truck, I can tell you which jumpers to change.

Is there any way to tell from the vin# what axle gears it has?
Vin: 1GCDC14HXGF432259

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