how do you convert a 23 spline to a 21 spline
84-88' G52/54 (carb) and 85-95' W56 (efi) trans always have a 21 spline output shaft. There are no couplers made to install a larger 23 spline input gear to the back of these trans. ![Mad :mad:](https://board.marlincrawler.com/Smileys/marlin/mad.gif)
86-87' R151F (22r turbo) and 88-95' R150F (V6) trans always have 23 spline output shafts and matching 23 spline t/case input gears. There are no couplers made for these trans that adapt to the smaller 21 spline t/case input gear.
Hope this help
Marlin
i have a g52 trany i purchased a adapter plate atached to a 23 spline t case. I have bunches of 21 spline t cases what should i do