couple of questions about mating my t-case and tranny

[GsxrMike]

Alright...i've got my np203 and th400 cleaned up and i'm ready to mate them together. I don't have any gaskets exept for the square oring that goes on the input adaptor. Can I use some black rtv or do I need to order gaskets? If I need to order gaskets, which gaskets do I need and where the heck do I order them from. Anybody got part numbers? Does anybody know what this combo could have come out of? (np203 32 spline short input with flanged front and fixed rear output/th400 short output.) Thanks!

 

[onetonbb74]

77.5, 78, 79 3/4 ton pickups came stock with th400/203 combos. the 203 gasket is discontinued by gm parts dept. I borrowed one from a rebuild kit at a tranny shop, then traced it out on gasket paper, then gave it back.

 

[gmc4cw]

Can I use some black rtv

yes.

 

[GsxrMike]

yes.

With no gaskets?

 

[gmc4cw]

With no gaskets?

yes.

 

[GsxrMike]

sweet! thank you!