Need help with my 700r4 TTC wiring harness

[Ricko1966]

Hook your low vacuum switch up it will make the truck more drivable without it your converter will lock going into 2 or 3rd depending on the transmission. With it working the converter won't lock until you are done accelerating through the gears,and won't be as harsh of shifts.

 

[jh86]

Found this with great info too

Need help diagnosing 700R4 lockup issues.. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Need help diagnosing 700R4 lockup issues.. The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

67-72chevytrucks.com

 

[Jgonick]

The EGR connection is optional. Having it hooked up properly gives you lockup in 3rd gear, but you don't really need it.

This was my understanding also- I also don't have an EGR (wires are just tied up out of the way.) The wiring diagram you posted is how my K10 is.

Also just a side note- -there are several ways 700R4 are wired internally and externally depending the vehicle setup.
ECM, Calf or Fed or Alt etc... Just pointing this out, because if a PO swapped or rebuilt the transmission you really do not know what is going on without opening and looking inside transmission.