[Asshat]

Originally Posted by Flathead Smith

If it were me I would find a HO52 (3/4 ton third member) or HO72 (one ton third member) with 4:11 gears and then take out the KS-10 Locker from your differential, and drop into the new differential. If you do not wish to use the locker, there are some here who would buy it from you, including me.

https://www.speedwaymotors.com/1960-...Kit,46251.html

https://www.ebay.com/itm/1963-72-Che...-/172466216108

https://welderseries.ecwid.com/Unive...Rear-p51463697

https://reactsuspension.com/products...2-c10-6372-008

Just so you know, if you have the old style HO52 third member with the double-row ball pinion bearing, a 4:11 ring gear set will not fit. I suspect these third members had a design change around 1967 and started using a double-row taper bearing on the pinion. But I have seen conflicting information on this for example Yukon.

The double pinion may also have something to do with the load bolt design of the HO72...I am not sure. When you go to Yukon gear & axle they show the ball bearing pinion bearing being used on the non-load bolt HO72 from 1960 - 1972 and the taper bearing being used on the load- bolt HO72 from 1960 - 1972. But I think Yukon’s information is wrong.

I have heard that there was a 3:90 ratio available for the HO52/HO72, but I have never seen one. It may have been an aftermarket offering.

How difficult is it to remove the locker from the KS10?