Here is the T5 service manual. This may help you out.
http://www.tremec.com/English/media/pdfs_autogen/T-5_Service_Manual.pdf
You have to use the jeep part because ford doesn't make a gear with a higher ratio then 21 teeth. The jeep part works just fine and is decently accurate for most applications but not 100%
http://www.tremec.com/English/media/pdfs_autogen/T-5_Service_Manual.pdf
You have to use the jeep part because ford doesn't make a gear with a higher ratio then 21 teeth. The jeep part works just fine and is decently accurate for most applications but not 100%