Topic: T-case question

[Loosekannon]

A 23 spline transfercase, could a 21 spline be put behind it to double up? I understand the 23 spline input for the tranny. But what is the backside of it, the same as a 21 spline? So could you use a 21 spline doubler behind the 23 spline case or is the input shaft also have more splines where in ingages the gears in the case? I looked around here and Pirate but found nothing really, or my search skills are weak. 

[jonathan82toy]

You can run a 21 spline behind a 23 spline trans.

[Duffil]

A 23 spline transfercase, could a 21 spline be put behind it to double up? I understand the 23 spline input for the tranny. But what is the backside of it, the same as a 21 spline? So could you use a 21 spline doubler behind the 23 spline case or is the input shaft also have more splines where in ingages the gears in the case? I looked around here and Pirate but found nothing really, or my search skills are weak. 

the backside is whichever you want when you buy the adapter. The coupler mimics the trans output on the backside.

[Loosekannon [OP]]

Thanks guys, I figured it would work. Just wanted to make sure. 

[Nothingface5384]

to add to the orginal question, ..say you got a 23 spline AA adapter and a MC 23 splinecoupler...could you run 2 transfercases with 23 spline or does one have to be 23 spline and one has to be 21 spline? just one has to be forward and one has to be topshift to make the duals work?

[EarlKann]

to add to the orginal question, ..say you got a 23 spline AA adapter and a MC 23 splinecoupler...could you run 2 transfercases with 23 spline or does one have to be 23 spline and one has to be 21 spline? just one has to be forward and one has to be topshift to make the duals work?

Your front transfercase input will have to match the transmission output.  L, G, and W transmissions are all 21-spline outputs.  R-series trans are 23 spline, so if you have an R-series trans then yes, you could run two 23-spline cases.

FYI, the couplers sometimes vary between manufacturers, so a MC coupler will not necessarily work in an AA adapter.  It might, but it might not.