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**rideblue00** · 07-21-2023, 02:25 PM

FWIW, just my 2 cents...in the standard 1/2T 2wd axle 3.73 up to 4.10(not sure about 4.56) is one carrier size and 3.42 and less is a different carrier size. I have the 3.73 in my 1/2T still, but have bought the diff carrier to run 3.42. Im sorry I dont know that carrier part number off hand, but some digging from someone with a GM parts manual they should be able to confirm, even with K series.

07-21-2023, 02:25 PM	#3
rideblue00 Senior Member Join Date: Feb 2010 Location: Lambertville, MI Posts: 1,856	Re: 1966 K10 Axle Gear Ratio FWIW, just my 2 cents...in the standard 1/2T 2wd axle 3.73 up to 4.10(not sure about 4.56) is one carrier size and 3.42 and less is a different carrier size. I have the 3.73 in my 1/2T still, but have bought the diff carrier to run 3.42. Im sorry I dont know that carrier part number off hand, but some digging from someone with a GM parts manual they should be able to confirm, even with K series.