Rear Axle Ratio Charts For 1967 - 1972 GM Trucks

['68OrangeSunshine]

Originally Posted by dlyons321

This is one awesome thread!
Is the KE designated as 4 wheel drive rear end?

Yes. Specifically K = 4WD [C = 2WD, but you knew that.]
E = Eight cylinders.

Other designators are -- KS, KM, KA.
S = Six cylinders [L6]
M = Six cylinders [V6]
A = All trucks.

Front wheel drive [only] was not an option in this era. All vehicles were primarily rear wheel drive. Front wheel drive assist was actuated by locking the hubs. You have to get out of the truck, stand in the mud, stoop down and twist the levers on each side to engage.

The Corporation 12-Bolt differential was standard on all 1/2 tons.
[There may have been ''Heavy Half'' variations optioned, but I won't get into that. ]

dlyons321 -- Is your truck an automatic? Manual gearshift trucks got 3.73. Automatics got 3.08.
3.36 is an unusual ratio for a pickup.
G/10s are 1/2 ton Vans iirc.