From 1999 to 2001 is the same and then in 2002 and up it changes. Sometimes the 99-01 is referred to as the small diameter and the 02 and up as the large diameter. This is due to the overall diameter of the 2nd clutch and the 2nd coast frictions and steels.
In some instances I have seen the small diameter carry over in early 2002 models. I have one client with a 2002 BMW X5 where this occurred. If you are not sure if you have the small or large diameter version of the transmission all you need to do is measure the overall diameter of the 2nd clutch and coast frictions.
The frictions and steels are double sided in this unit. They can be identified by the tooth directions. In the frictions the tooth are internal and the steels have external teeth. Below you will find a count of each friction and steel needed individually; the number of each does not change for year difference. The second coast and clutch will be left last with diameter size. Besides the two frictions that change there are differences in the pistons and the filter changes for each application. Everything else as far as the kits are the same. The master and banner kits are available with or with out the piston kit.
Overdrive Frictions and Steels: 2 each
Coast Frictions and Steels: 3 each
Intermediate Frictions and Steels: 3 each
Direct Frictions and Steels: 4 each
Forward Frictions and Steels: 4 each
Reverse Frictions and Steels: 2 each
Low Reverse Frictions: 5
Low Reverse Steels: 4
2nd Coast 173mm overall diameter Frictions: 3 (1999-2001 small diameter)
2nd Coast 176mm overall diameter Frictions: 3 (2002-Up large diameter)
2nd Coast 173mm overall diameter Steels: 4 each (1999-2001 small diameter)
2nd Coast 176mm overall diameter Steels: 4 each (2002-Up large diameter)
2nd Clutch 130mm overall diameter Frictions and Steels: 5 each (1999-2001 small diameter)
2nd Clutch 138mm overall diameter Frictions and Steels: 5 each (2002-Up large diameter)
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