Tip In Switch And TCC solenoids

[wrightjt2007]

I have done a lot of research on the vacuum on my truck. basically I have deleted everything except the vacuum advance and the lines to the Tip in switch and the TCC solenoids. I tested the continuity of the switches by probing the connectors with a multimeter for continuity, the beep mode, and got nothing. i tested the wire same thing continuity with the key turned to the on position and got a beep. based on this im assuming that the solenoids are bad. ( If I am wrong please correct me ). now i am on the hunt for new ones, but the hardest thing about working on these truck is the original parts are around anymore. does anyone have experience with this and have a fix or a place to buy these original replacement parts?

 

[Ricko1966]

I'd check them with the engine running or a mighty vac to apply and bleed vacuum

 

[wrightjt2007]

the truck ran amazing before with a little trouble of staying in overdrive while climbing hills causing me to floor it to shift in to 3rd, after hooking up the solenoids nothing changed, if anything a very slight increase in Horse power