98 Vs 94 4L60E

[Len Sabatine]

       Might want to check if 94 4L60E has PWM Pump , 98 has it , OBD2 PCM
       will be looking for it. If 94 is sans , Install later PWM Pump and 
change the
       internal harness and connector. Trans control harness from 94 PCM 
will be
       missing the required extra wire[s]. Ya just need to compare what you 
have
       against the 98. Most 95 and later 4L60Es are PWM, Most 94 and earlier
       are not. The 98 trans should have  a bolt on bell housing , your 94 
may not.
       Compare all functions from the 98 to your 94 , avoids problems 
later.You'll
       need longer Selector- Detent  shaft to utilize the external PRNDL / 
BackUp
       Light switch module and the needed Metri Pack connectors.If you get 
the 98
       Trans, get torque converter with it.   FYI.
       Len

>I need a quick answer on this one. I have some manuals on the way but I
>don't think they'll get here in time. I currently have a 94 TBI 5.7L w/
>4L60E setup. I have found a good deal on a 98 model Vortec 5.7L that
>originally had a 4L60E as well. I want to remove the TBI motor and drop in
>the Vortec. I need to know if the VCM from a 98 C1500 w/5.7L & 4L60E tranny
>will work with a similar 94 model 4L60E.  I know the '98 4L60E has a PRNDL
>switch and my 94 does not. My 94 does have the bosses on the tranny for it
>though. I will install the PRNDL switch on the '94. I just want to double
>check and make sure they didn't change the location of any wires within the
>wiring harness plug at the tranny etc. I can scan in the 94 model diagram
>from the manual if anyone has a newer manual to compare with. I just need to
>know if this will work before I buy the engine.
>Thanks
>Paul Washburn
>lpwcruzr at sysmatrix.net
>
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