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Classic/Antique Car Repair/Pilot shaft length -T-85 trans



I enjoy your column immensely. I was told that there are three

different length of the pilot shafts on a T-85  transmissions.

Also on my 312 T-bird engine on the pulley damper the weight

collar has shifted back towards the motor on the crank shaft. I

pounded it back in place toward the pulley but whats to keep it

from moving again?

As to the transmission it would surprise me if there were only three different input shaft length as this transmission was used in a bunch of different applications. But I am not up on the actual measurement and specifications. Now to the harmonic balancer, the weight is held on to the Assembly by vulcanized rubber. Once it has broken loose and moved the assembly should be replaced as the timing mark is out of alignment and it will be out of balance.

Classic/Antique Car Repair

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Brad Sears


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.


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.

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.

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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