I have noticed that my transmission has begun to slip during the 2-3 shift.

The behavior improves/changes when I bypass the small vacuum valves mounted on the engine valve cover.

What are these switches supposed to do - mine are probably leaking vacuum.

Are these a junkyard or dealer item?

Thanks,
Jim Jim Jim

 

Eliminate them? To cut down vacuum robbing. Brilliant!!! My question is do you super diesel motor heads have a thread containing info such as this for us newly converted newbies to fine tune our sludge bangers like yours?
What are some basic tips and tricks to help do it your selfers put our machines in top operating condition?

 

Article on transmissions.
http://www.continentalimports.com/ser_ic20242.html