Speedometer sensor in trans...need replacement
 

This is for my 89 GTUs NA...Not sure how it happened, but the aluminum piece that holds the speedo gear in the trans cracked. The mounting tab completely broke off.

I am in need a replacement. Does anyone know if this part is interchangeable between S4 and S5 transmissions? I’m thinking about hitting up the dealer, but if anyone has a used one for sale, my paypal account is ready to make a deposit into yours.

Let me know.

I can't say I've noticed any difference between that part on S4 & S5 transmissions. The speedometer cables themselves are interchangeable, so the part it threads into should be as well.

See if a dealer can order it, or find someone with a junk transmission that doesn't mind selling you a tiny part of it.