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Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
TR4/4A TR4A Torque Reaction Arm
- Thread starter karls59tr
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HerronScott
Darth Vader
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Karl,
I seem to remember this question coming up once before. I don't think TR4A's had them at least neither of my 1966 TR4A's had them and I don't see it listed in the SPC for the TR4A.
Scott
I seem to remember this question coming up once before. I don't think TR4A's had them at least neither of my 1966 TR4A's had them and I don't see it listed in the SPC for the TR4A.
Scott
LBCs_since_1988
Jedi Hopeful
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It'd be a worthwhile addition for a car that is driven hard. Don't know where one could be had for a TR4A. I've noticed that if I am at speed (70ish) and quickly accelerate or lift off the accelerator I'll get a very slight wiggle. Of course it could be the entire 45-year-old frame and body flexing.
bgbassplyr
Darth Vader
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If you are racing or driving hard on the street, they take the twisting load off of the motor and trans mounts. Might make for more vibrations to the body though. I made them for all of race and auto-x cars, but for the normally driven street car, not really necessary IMO.
The engine restrictor bracket (torque reaction arm) was introduced on the TR4 in March 1962 starting with CT3055 and was to be retrofitted by the dealers to earlier cars. It was designed to prevent damage to the underside of the power bulge by carburetors contacting the hood under engine reaction movement. Triumph was obviously aware of the problem and stated that it was to be used until increased hood clearance was introduced as a permanent solution. This solution happened at CT6430 with the long-bubble hood. So in theory, only the short-bubble hood TR4s should have this arm.
gary
gary