input shaft

[grizzlypaugh]

87 21spline np231 is there a kit to make it a 23spline? like replacing the input gear?

 

[Johnnie Walker]

You can swap input shafts, but the t-cases are usually pretty easy to come by so might as well buy one that is 23-spl. already. SInce you ahve to open the t-case, might as well rebuild/upgrade the chain/maybe to a 6-plantary gear. and SYE.