Search results

When you mount those valves they need the spring preloaded. You basically have to mount it past the point it normally mounts and rotate it against the spring to the correct location.

Does the valve on the IP work? You can get them from the Chevy dealer still for about $125. You can test it manually with the truck running, just see if moving the throttle changes the amount of vacuum going through the valve. Also, check your transmission fluid and make sure it does not smell...

No one said anything about getting an adjustable vacuum pump. His original post said he adjusted something between the firewall and the air cleaner... that was likely the vacuum pump which I was letting him know did not do anything to help the situation.

The valve mounted on the side of the IP is a common failure point. It is supposed to give you an adjustment point to mimic the manifold vacuum of a gas motor, but if it is stuck on full vacuum, the tranny won't shift right. The vacuum pump (located between the air cleaner and firewall on the...