![]() In the pan, there are two solenoids on the front face (relative to the transmission in the car) of the valvebody. '96: VSS on passenger side of tailshaft housing, and when you remove the torque converter, there is "PWM" in raised letters on the front surface of the pump. '95: VSS on driver's side of tailshaft housing, and when you remove the torque converter, there is "PWM" in raised letters on the front surface of the pump. Inside of the wiring connector is purple. In the pan, only one solenoid on the front face (relative to the transmission in the car) of the valvebody. '94: VSS on driver's side of tailshaft housing, and when you remove the torque converter, there is no "PWM" on the front surface of the pump. How to visually tell B and D-body transmissions apart by year: This solved the low/reverse clutch release problem and makes the TransGo manual valve mod unnecessary. There was a new manual valve added along with a relief port over the manual valve on the valve body casting with this change. Also changed the 3-2 downshift solenoid in mid-1995 from TBD to TBD. ’96: PWM TCC plus a different tailhousing design with new-style Vehicle Speed Sensor (VSS). Also changed 3-2 downshift solenoid mid-year (see '96, below). ’95: Added a Pulse-Width Modulation Torque Converter Clutch (TCC) apply solenoid to control the feel of the TC clutch lockup (blamed for many 4L60E problems TransGo HD2-C bypasses this, or you can stake the TCC apply valve in place). Everything else is done mechanically/hydraulically. The PCM controls line pressure (holding power and shift feel), 1-2, 2-3 and 3-4 shift points (rpm), and TCC lockup (timing and in the ’95-up models, apply feel). ’94: First year of electronic controls in the valvebody (versus the ’93 4L60, which did not have this). ![]() GM B and D-body 4L60E differences by year: A what-body? - refers to the GM vehicle "platform": (relevant years are included)ī-body: Chevy Caprice, Buick Roadmaster, Olds Custom CruiserĪll 4L60E/4L60/700R4 have the same gear ratios which cannot be modified: ![]()
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