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Old 02-17-2020, 01:59 AM   #17
Short 3/4
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Join Date: Jan 2017
Location: Los Osos Ca
Posts: 537
Re: Rockwell t221 gear slop

Something I forgot to mention that you might find interesting. While I was doing all the above mentioned swapping and fixing etc, I ran the truck for quite a while without the x-fer case installed. Figured I'd check the gas mileage and then compare when the case went back in. Believe it or not it averaged 13mpg with or without that crazy inefficient counter shaft style case. Go figure.
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65 short stepside K10
292-SM420-T221
8 lug closed D44 front
NoSpin HO72 4.10 rear
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