|
При заказе надо четко не проебать ГОД!!! выпуска иначе
GM B and D-body 4L60E differences by year:
’94: First year of electronic controls in the valvebody (versus the ’93 4L60, which did not have this). 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). Everything else is done mechanically/hydraulically.
’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). Also changed 3-2 downshift solenoid mid-year (see '96, below).
’96: PWM TCC plus a different tailhousing design with new-style Vehicle Speed Sensor (VSS). Also changed the 3-2 downshift solenoid in mid-1995 from TBD to TBD. There was a new manual valve added along with a relief port over the manual valve on the valve body casting with this change. This solved the low/reverse clutch release problem and makes the TransGo manual valve mod unnecessary.
Year to Year B/D-body Swap Guide:
To put a ’94 4L60E into a ’95 car: Direct bolt-in. The PCM must be reprogrammed with ’94 transmission base code to avoid setting a silent code (Check Engine Light (CEL) does not illuminate, but code stored in memory). Trans will operate normally without reprogramming. The silent code (code 83) will inhibit TCC lockup. Three potential fixes (any one will work); 1. reprogram PCM so it doesn't look for the PWM solenoid, 2. Add the wire into the harness or swap the '95-96 harness into the car ALONG WITH the internal transmission harness with the PWM solenoid connected but leave the solenoid in the pan, not installed in the valvebody as a '95-96 setup would have, or 3. wire up a manual TCC lock switch by which you can lock the converter.
To put a ’94 4L60E into a ’96 car: The ’96 tailshaft housing and VSS must be installed on the ’94 4L60E before the trans can be bolted into the car. The PCM must be reprogrammed with ’94 transmission base code to avoid setting a silent code (Check Engine Light (CEL) does not illuminate, but code stored in memory). Trans will operate normally without reprogramming. The silent code (OBD2 equivalent of code 83) will inhibit TCC lockup. Three potential fixes (any one will work); 1. reprogram PCM so it doesn't look for the PWM solenoid, 2. swap the '95-96 harness into the car ALONG WITH the PWM solenoid connected but leave the solenoid in the pan, 3. wire up a manual TCC lock switch by which you can lock the converter.
To put a ’95 4L60E into a ’96 car: The ’96 tailshaft housing and VSS must be installed on the ’95 4L60E before the trans can be bolted into the car. Technically, the 3-2 downshift solenoid should be swapped also, but experience shows that it is not required.
To put a ’95 4L60E into a ’94 car: No mechanical mods required. The TCC valve mod must be performed. The trans will operate normally without the mod but TCC lockup will not work, so highway and cruising gas mileage will suffer and more heat will be produced in the transmission.
To put a ’96 4L60E into a ’95 car: The ’95 tailshaft housing and VSS must be installed on the ’96 4L60E before the trans can be bolted into the car. Technically, the 3-2 downshift solenoid should be swapped also, but experience shows that it is not required. No other modifications are necessary.
To put a ’96 4L60E into a ’94 car: The ’94 tailshaft housing and VSS must be installed on the ’96 4L60E before the trans can be bolted into the car. The TCC mod must be performed. The trans will operate normally without the TCC mod but TCC lockup will not work, so highway and cruising gas mileage will suffer and more heat will be produced in the transmission.
TCC Mod (method 1):
An additional wire must be run from the PCM connector D pin 6 to pin "U" on the trans harness for the TCC to work. Also, the PCM must be reprogrammed with ’95 transmission base code. In my opinion this is more work than its worth due to the amount of labor involved in properly routing an additional wire into the powertrain wiring harness.
TCC Mod (method 2):
Leave the PWM solenoid unplugged but installed. On the valve directly to the right of the PWM solenoid – push that valve all the way towards the outside of the valvebody, and stake it into place. That’ll lock keep the valve acted on by the PWM in the full-open position and it’ll function like a '94 style lockup. No PCM reprogramming required. How to.
Notes for '91-93 B-body owners: You should be able to use a 2WD truck transmission as a swap donor, but I would recommend the motors match (5.0 donor =5.0 car only, 5.7 donor could be used in a 5.0 car). Also, check to make sure your electrical connectors match. GM changed the connector plug at least once between 1987 and 1993. Tailshaft housings house the VSS assembly which can be removed and swapped but make sure you get the gears and everything swapped over correctly.
|
Вход
Регистрация
FAQ
