Can an 0411 operate a 1993 4L60E?

[dave w]

I've been wondering if an '0411 PCM can operate a 1993 4L60E? It's my understanding that the 1993 4L60E is a non-PWM TCC. I've been thinking maybe with the OS used for the Express Van 5.7 liter might have the transmission segment I can use?

dave w

[RobertISaar]

perhaps i'm used to the 6 cylinder F-bodies, but i thought 93 was still just the 4L60, not an E? not familiar with the truck applications of the era though.

[brian617]

perhaps i'm used to the 6 cylinder F-bodies, but i thought 93 was still just the 4L60, not an E? not familiar with the truck applications of the era though.

93 Model trucks could have either version.

[dave w]

perhaps i'm used to the 6 cylinder F-bodies, but i thought 93 was still just the 4L60, not an E? not familiar with the truck applications of the era though.

Currently, the transmission is being controlled by a 16168625 PCM (red / blue) connectors with definition $E6. I've been thinking about converting the SBC to a LS 5.3 Liter. Maybe the original PCM can be tricked into controlling the 4L60E and use the '0411 for engine only?

dave w

[EagleMark]

I think it's easier then that Dave. TCC just get's turned on, not PWM turned on. Change {D2903} and {D2904} to both 100%. Would probably do the trick with the regular solinoid in the truck? Since the signal would be 100% I don't think the PWM solinoid would be needed?

In the trucks the PWM TCC was started in 1995.

None of the '93 -'97 4L60E's are directly interchangeable, except '93 and '94!!! Here's a list of yearly differences that will show you why. Yes, some years will fit in others and may not even throw a code, but there will be an issue in the long run. The big issues become forced 3-2 downshifts, and converter lock up issues and burnt lock up clutches. When a converter cluych cause it to lose lock up, the 3-4 clutches, in the transmission will soon follow because the 3-4's need lock up to keep them cool while cruising in overdrive.

1993: These were used in trucks only. Not available in F-Bodies, B-Bodies, or Vettes

1994: Interchangeable with '93 4L60E with no modifications. The '93-'94 is a NON PWM transmission. This means that the lock up apply strategy is an on /off arrangement. It has an 11 pin case connector. Does not have PWM cast into front pump. 1 piece TCC control valve in the valve body. Plate has holes in plate, marked in diagram below. 1st design 3-2 valve

1995: Stand alone year! Will not interchange with any other year. This is a PWM transmission. An extra solenoid was added to the valve body to control the pulsed lock up strategy of the conerter clutch. It has a 12 pin case connector, extra wire in the transmission to computer harness and different computer to control the new PWM circuit. Has PWM cast in front pump. Front pump internal passages different to match new TCC strategy. 2 piece TCC control valve in valve body. Has holes in plate, marked in diagram below. 1st design 3-2 valve. 12 pin case connector. '94 computer won't recognise new TCC strategy., and will burn lock-up clutch and 3-4 clutches up. '96 computer isn't compatible with '96 3-2 control solenoid.

http://www.impalassforum.com/vBullet...d.php?t=269586

[lionelhutz]

I think Mark is right, set the computer to 100% and it should work as on-off. You would have to turn off the code for the PWM solenoid failure. You also may need to connect a power resistor where the PWM solenoid is to trick the computer into thinking it's there.

Just an FYI - I had a LT1 with a 95 transmission I swapped into another car and the harness I put together was missing the TCC pwm wire. It still shifted and even tried to lock the converter. It did not immediately go into limp mode. This wasn't a 0411 computer but the 0411 shouldn't go into limp mode either for a TCC problem.

The guys at ImpalaSS forum freaking on that posted to change the whole harness to swap the 94 transmission and computer into a 95 is over the top. The one extra PWM wire in his harness won't have any effect on the swap.

[EagleMark]

The guys at ImpalaSS forum freaking on that posted to change the whole harness to swap the 94 transmission and computer into a 95 is over the top. The one extra PWM wire in his harness won't have any effect on the swap.

I couldn't understand the issue with one wire? Swap a whole harness may be easier for parts replacers?

Of course there is an issue of re-flashing the PCM with proper 94 non PWM TCC calibration or 95 PWM TCC calibration as they are different as well.

I run into that a lot with the 94-95 TBI trucks