TM 9-2320-366-34-2 H-2          Change 1 TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART (CONT) (1) Installed Controls or Controls Being Installed (2) Installed Transmission or Transmission Being Installed (3) Required Modification (Refer to Section III) WTEC II (with 24-pin connector) TID 3 (transmission serial number 6510262117 and subsequent) Install 31-pin connector, replace transmission internal wiring harness, and reprogram WTEC II TEPSS. ¹ WTEC II (with 31-pin connector) PRE-ID w/ 24-pin connector (transmission serial number prior to 6510032369) Install adapter cable assembly. WTEC II (with 31-pin connector) PRE-ID w/ 31-pin connector (transmission serial number 6510032369 to 6510090785) No modification required. WTEC II (with 31-pin connector) TID 1 (transmission serial number 6510090786 to 6510142171) No modification required. WTEC II (with 31-pin connector) TID 2 (transmission serial number 6510142172 to 6510262116) Replace transmission internal wiring harness. WTEC II (with 31-pin connector) TID 3 (transmission serial number 6510262117 and subsequent) Replace transmission internal wiring harness and reprogram WTEC II TEPSS. ¹ WTEC III (with ECU manufactured prior to October 1999) ² PRE-ID w/ 24-pin connector (transmission serial number prior to 6510032369) Install adapter cable assembly and ID harness. WTEC III (with ECU manufactured prior to October 1999) ² PRE-ID w/ 31-pin connector (transmission serial number 6510032369 to 6510090785) Install ID harness. WTEC III (with ECU manufactured prior to October 1999) ² TID 1 (transmission serial number 6510090786 to 6510142171) No modification required. WTEC III (with ECU manufactured prior to October 1999) ² TID 2 (transmission serial number 6510142172 to 6510262116) No modification required. WTEC III (with ECU manufactured prior to October 1999) ² TID 3 (transmission serial number 6510262117 and subsequent) Reprogram WTEC III ECU ¹ or install new WTEC III ECU (P/N 12421787- 002). WTEC III (with ECU manufactured after to October 1999) ³ PRE-ID w/ 24-pin connector (transmission serial number prior to 6510032369) Install adapter cable assembly and ID harness. WTEC III (with ECU manufactured after to October 1999) ³ PRE-ID w/ 31-pin connector (transmission serial number 6510032369 to 6510090785) Install ID harness. WTEC III (with ECU manufactured after to October 1999) ³ TID 1 (transmission serial number 6510090786 to 6510142171) No modification required.                                                           1 Reprogramming can only be accomplished by an authorized Allison Transmission distributor. You must provide the transmission serial number of the transmission being installed to ensure correct reprogramming. If at a later time, an earlier version transmission is installed in a WTEC II equipped vehicle, WTEC II TEPSS will require reprogramming again. 2 Vehicle serial number 012477 and lower.  Refer to Figure 1. 3 Vehicle serial number 012478 and higher.  Refer to Figure 1.