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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

94 pcm and 95 4l60e

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Old Nov 25, 2011 | 12:27 PM
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Default 94 pcm and 95 4l60e
Is a 95 4l60e compatible with the 94 pcm?
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Old Nov 25, 2011 | 12:38 PM
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as long as both are obdI/a4 i don't forsee any problems.
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Old Nov 25, 2011 | 01:55 PM
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No, 1995 has PWM.
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Old Nov 25, 2011 | 02:08 PM
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I stand corrected.
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Old Nov 25, 2011 | 02:24 PM
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so could one be made to work with the other? Or is it not worth it? I would rebuild my trans but the case is cracked.
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Old Nov 25, 2011 | 04:15 PM
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94 and 95 PCMs are the same, but use different programming. Flash it with the year tune to accommodate the transmission used. IOW, if you want to use a 95 4L60E with 94 PCM, flash it with a 95 auto tune.
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Old Nov 25, 2011 | 04:59 PM
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Ok simple enough. Thanks
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Old Nov 25, 2011 | 05:23 PM
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The pwm lock up converters have one more solenoid in the transmission. You will need to add in the wire from the trans to pcm. Then reflash to 95.

http://shbox.com/1/harness_connector_faces.htm pin U
http://shbox.com/1/1995_pcm_conn_d.jpg pin D6
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Old Nov 25, 2011 | 05:55 PM
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Originally Posted by flame
The pwm lock up converters have one more solenoid in the transmission. You will need to add in the wire from the trans to pcm. Then reflash to 95.

http://shbox.com/1/harness_connector_faces.htm pin U
http://shbox.com/1/1995_pcm_conn_d.jpg pin D6
Correct. I was only addressing the compatibility issue of the PCM and trans. You will need the extra wire, if you are using the 94s wiring harness.
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