Which generation of torque converter?

Identifying what’s in your Allison 1000/2000/2400 Series

Since the release of the Allison 1000/2000/2400 series transmission, four basic torque converter configurations have been used. TC-210, TC-211, TC-221 and TC-222 can be found in Group 21 of the Allison Parts Book, and these four converters all have different stall torque ratios and “K” factors. Over the years there have been several revisions made to the torque converter assembly process for all four converters, and each time a change was made, a new part number was assigned. None of these changes had an effect on the performance or functionality of the torque converter. Different generations of each of the four converters are completely interchangeable with other generations of the same type.

The first four generations of torque converters were built by one manufacturer, and this continued through the end of the 2005 model year. Another company took over production of the Allison series converters at the beginning of the 2006 model year, and issued new part numbers for the fifth generation of converters. Figure 1 shows a complete listing of all part numbers to date, from the first through fifth generation.

To read the rest of this Technical Article on the Sonnax Website click here.

Article No.: TCTIP-11-07
Author: Ed Lee
Total Pages: 2

©2010 Sonnax Industries, Inc.