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TR4/4A TR-4 overdrive vibration

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Bruno_69z28

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I bought a rebuilt overdrive transmission for my TR-4 about 8 years ago. I've been driving the car on the street for the last two years(no highway miles). The transmission goes in and out of overdrive without a problem. Well I finally drove it on the freeway when I noticed a vibration. It comes on only in overdrive at about 65-70 mph. It seems to get worse going up a hill under load. Its not constant, it's like waaa....waaa...waaa (hope that makes sense). I didn't have this problem with the old non-overdrive transmission. At he same speed without the overdrive engaged there is no vibration. Any ideas?? Or if there's someone in the San Francisco bay area who works on these?

Bill
 
Something bent, or the planet gears not phased properly to the sun gear.

Sorry, no help on who to take it to. Herman van den Akker doesn't do them any more.
 
Randall, thanks for getting back to me. I called Quantum Mechanics back east and they agreed with your diagnosis. If I remove the overdrive, they will rebuild it for $350 plus parts and shipping. The last guy I used to work on British transmissions was a guy named Dwayne out of Hayward Ca.. I don't have his phone number anymore. Does his name sound familiar to anyone? Thanks again for all your help.

Bill
 
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