You are here:
Classic/Antique Car Repair/Turbo 400
Advertisement
Question
I have a 1971 W-30 4-4-2 with automatic transmission. When it sets for a period of time, usually over 3 or 4 months, the transmission dumps fluid. I had a 1970 Chevelle SS 396 with the same transmision that did the same thing. Is this normal and is there anything I can do to prevent it?
Hi Billy:
The seals in a TH-400 work best when heat is applied to them. The expectation of GM was these vehicles would be driven and the heat from the transmission would keep the seal swollen and leakless. Having them set for that length of time weaken the transmission seals as well as the head gaskets, although the head gaskets usually takes a little longer to leak. RECOMMENDATION...Drive her weekly if possible.
Related Articles
Answers by Expert:
Vern Bullock
Expertise
Visit my website at: http://www.classytransportation.com/ I can answer most questions about autos built in the 60's 70's and 80's. Specifically, Lincolns, Rolls Royces and the Excaliburs. Mechanical issues and technical questions are my expertise. I also have a general knowledge of most older automobiles. Keep in mind, I can only provide answers if the questions are very specific and complete. Without details, I can only speculate and that's not good for solving your problem.
Experience
I have owned and maintained Silver Shadows for over 10 years now. I find most mechanics and even Rolls Royce mechanics have very little knowledge about these automobiles. I have researched these cars in quite a bit of detail and can pretty much tell you what is wrong, if you can describe the behavior in detail. I have saved quite a few RR owners a lot of money and aggravation due to improper diagnosis. I am the owner of Classy Transportation, LLC a luxury limousine service specializing in antique cars, classic cars, vintage cars and exotic cars.
Organizations
Classy Transportation, LLC Limousine Service.
Publications
All around the Internet
Education/Credentials
I hold a BS degree in computer science and a MS degree in mechanical engineering.
Awards and Honors
I regularly compete at car shows and average around a dozen awards annually.
Past/Present Clients
See Web site at: http://www.classytransportation.com/
©2012 About.com, a part of The New York Times Company. All rights reserved.