Classic/Antique Car Repair/powerglide

Advertisement

Expert: - 11/14/2009


Question
I have not worked with auto trans before. I'm putting one in a 1972 chev 1/2 ton . What dose the vacuum line on the back of the powerglide hook up to. And do I have to mount the rear of the trans. on a rubber mount.

Thanks Ray

Answer
The vacuum line is connected to the intake manifold of the engine to read engine load via vacuum. This system limited the throttle rod function to just signaling passing gear rather than signaling throttle position for gear shift points. The vacuum now controlled shift points. As far as the rear mount goes, the purpose of the rubber in the mounts is two fold. !. To allow the engine and transmission to move slightly for alignment and 2. to eliminate engine vibration up through the vehicle. Yes there should be a rubber isolated mount at each mounting point.
Brad

Classic/Antique Car Repair

All Answers

Answers by Expert:

Ask Experts

Volunteer

Brad Sears

Expertise

All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.

Experience

Automotive tech instructor. Syndicated auto columnist 1970's though the early 1990's. Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's TV Show "Last Chance Garage" 1980's PBS-TV syndicated. Auto instructor for the following companies: Fram Autolyte Holly Carter AMF Ford Motor University Of Conn Blue Hills Technical School Sugar River Technical Center Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.

Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.

Education/Credentials
More than I care to remember. Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.

Awards and Honors
Moto Award winner. And much more.

©2012 About.com, a part of The New York Times Company. All rights reserved.