4T-65E

[Peter D. Hipson]

-> lt gn - 1-2 shift solenoid 
-> yl/bk - 2-3 shift solenoid
-> rd/bk - EPC solenoid
->bl/wt - EPC solenoid return
->br    - TCC lockup solenoid
->pk    - +12V for 1-2, 2-3, and TCC solenoids.
<-rd/bk - Input shaft speed sender (TISS)
<-bl/wt - Input shaft speed sender (TISS) return
<-pink  - Reverse switch
<-yellow- TTC Released switch
<-DK BL - Range switch, tells TCM which gear the driver selected.
<-Red   - Range switch, tells TCM which gear the driver selected.
          range switches are switched to ground.
<-yl/bk - Temp sensor
<-black - Temp sensor return.

-> to transmission (from TCM)
<- to TCM (from transmission)

The TCC lockup switch is used to diagnose a TCC failed to unlock or lock
type error. TISS is used to diagnose slipage adn other drive faults. EPC is
the pressure controller solenoid, typically both TCC and EPC are PWM driven.


At 05:17 PM 7/27/99 -0400, you wrote:
>
>The page I had faxed to me can be found at
>http://www.transonline.com/atsg/bulletins/index.cfm
>
>look for the 4T65E and look at the tech bulletins, I just found it there...
>thanks a lot!
>
>Kevin Margitta
>
>
>
>
Thanks, 
        Peter Hipson (founder, NEHOG)
        1995 White NA Hummer Wagon