I am resealing a 901 transmission with about 80K miles that was leaking from the intermediate plate area. Transmission was working well and was quiet, just leaking.

I have the nose cone off and intermediate plate/gear cluster removed. There was one gasket between the case and intermediate plate. It is about 0.17mm thick based on an average of several mic readings (readings 0.16 to 0.18mm). The Erling gasket set contained 3 x gaskets all 0.22mm thick uncompressed - I would have thought it might have include 0.1mm, 0.15mm and 0.2mm - oh well.

The original gasket came off undamaged in one piece so my question is:

A) do I clean and reuse the original gasket with sparing use of Curil T on both sides; or
B) order a new 0.15 mm gasket; or
C) use 1 x 0.22 mm new gasket and hope it compresses 25% to 0.165mm?

Advice appreciated. I am a transmission newbie.