t-case input spline count

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99xcss4

frank'n (truburban) K-2500
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I know that th350/700r4/4l60/4l60e are 27 spline and that th400 and 4li0e are 32 spline. I have a t-case from a 90 or 91 4 speed manual trans dose any one know what the spline count is? I think on the old square bodies the manual and th400 were both 32 spline I do not know if the gmt400s continued this or not.
 

packer0440

I'm Awesome
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It should be 32 spline. If I’m not mistaken all stick shifts have 32 spline outputs on these trucks. However, keep in mind that if it came out of a dually it will be a borg Warner tcase which has different wiring and most likely different driveshafts.
 

99xcss4

frank'n (truburban) K-2500
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thanks for the reply I was able to id the trans and it is a sm465 32 spline should bolt up to the 4l80e if I ever need it.
 
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