WTEC III ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL GENERAL DESCRIPTION Copyright © 2001 General Motors Corp. 1–13 (blue connector). The purpose of TransID 1 was to provide a common transmission for use with both WTEC II and WTEC III systems (V7A and V8). The only difference between a pre-TransID transmission and a TransID 1 transmission is the internal wiring harness which connects the digital and analog grounds on the TID 1 harness. Adapter harness P/N 200100 can be ordered from St. Clair Technologies to provide the same connection outside the transmission and allow a pre-TransID transmission to be “converted” to a TransID 1 transmission.
All models of the World Transmission were built with the TransID 1 internal (feedthrough) harness beginning in September, 1996. Two changes were rolled into this update: the wiring change for TID 1 and a change to use a molded channel rather than the braided covering which was previously used. Both changes were rolled into the same internal harness P/N even though there was a delay in implementing the channel which resulted in the two S/N breaks. Table 1–1 lists the harness P/Ns for the different transmission models along with the S/Ns for both changes for each harness. Table 1–1.
TransID 1 S/N Breakpoint Transmission Model Pre-TransID Harness P/N TransID 1 Harness P/N S/N at Wiring Change S/N at U-Channel MD 3000/B 300/B 400 w/OLS 29516322 29529472 6510088864 6510096671 MD 3000/B 300/B 400 w/o OLS 29516323 29529473 6510089316 6510096683 MD 3070 PT 29516324 29529474 6510090786 6510096675 HD 4000/B 500 w/OLS 29516325 29529475 6610014067 6610015591 HD 4000/B 500 w/o OLS 29516326 29529476 6610014084 6610015700 HD 4070/4076 N/A N/A N/A N/A 2. TransID 2 The purpose of the TransID 2 change is to indicate the use of new sump and retarder temperature sensors (thermistors) and a new MD/B 300/B 400 retarder design.
The new retarder requires a different calibration than the old retarder. Retarder performance complaints will occur if the new retarder is controlled by the old retarder calibration or the old retarder is controlled by the new retarder calibration. TransID 2 internal harnesses contain both the new sump temperature sensor and a new connection point for the TransID wire. The TransID wire (195) is connected to Solenoid A ground (wire 120) to signal TID 2 to the ECU. The new temperature sensors are discussed below. A TransID 2 transmission will only work with a V8A or later ECU (WTEC III) and V8A and later ECUs are calibrated to accommodate both TransID 1 and TransID 2 transmissions.
The HD 4070/4076 was equipped with TransID 2 at the start of production.