Found this sm465 website..has some good info

[doonjumper]

http://www.novak-adapt.com/knowledge/sm465.htm

Spline Misunderstandings Clarified

"More splines are stronger"

Not necessarily. Larger shaft diameters are stronger, and larger shaft diameters usually require a higher quantity of splines. However, the automotive powertrain industries migrated to more splines on shafts due to their ease (speed, cost, etc.) of manufacture - smaller splines being able to be roll forged instead of the larger splines having to be machine cut.

A 32 spline output shaft vs. a 10 spline spline output shaft is probably only minutely stronger, and a decision of use here should be driven more by compatibility than perceived strength.

 

[K5Nate]

I have used Novak before. The tech people there sure know what they are talking about and have cleared up many of my woes before. Good stuff.

 

[cabledawg]

Gotta love the Muncies! I had three Burbs each with a SM465. One 4wd, one regular 2wd and one 2wd with a Ranger OD. Kickass trannies and I've never had an issue with any of them.

I used to have a website that had all the GM trannies, what years available and which vehicles, as well as basic specs like shaft and bearing sizes. That was on my old work computer so if I find it, I'll add it to this thread. Might have had t-cases as well.

 

[manchildau65]

The 10 spline set up doesn't compare to the 32 spline in my experience/opinion... It isn't so much because of the spline geometry, it is more because of the method of coupling. There are three sets of splines on the figure eight set-up (output to tranny, coupler, and input to t-case). These three splines have their own level of backlash with respect to eachother and add up to a lot more play than the two piece coupling of the 32 spline. I've broken two couplers in two different tranny/t-case set ups, I have yet to brake a 32 spline joint.

The Muncie and New Process set-up are awesome and tough to beat... just my opinion about the two.