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Classic/Antique Car Repair/1971 mustang mach 1 transmission leaking

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Expert: - 11/28/2010


Question
I have a 71 mustang mach 1 with a 429 V8.  The rear seal in the transmission is leaking. I know when I bring it to the dealer the traditional method is to remove the tranny, take it apart, fix the seal, and then put it back on the car. Do you know if there is a cheaper and possibly easier way to have it fixed but still having the same effectiveness?
                              Thanks

Answer
If it is the seal at the drive shaft that is leaking that is a simple job. Drop the drive shaft and remove the old seal. Then with a seal driver tool install the new seal and replace the drive shaft. If it is the gasket between the extension housing and the transmission case that too can be done in the car without removing the transmission. In fact it is the factory recommended way to do the job.

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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.

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