[TR] TR2/3 - gearshift vibration

Dean Mericas dmericas at austin.rr.com
Fri Sep 5 11:48:30 MDT 2014


FWIW, I found a dampening weight on eBay some years ago and installed it 
on my TR4.  It may have dampened the rattle a little, but it still makes 
the noise when accelerating.

Dean
1965 TR4

On 9/4/2014 4:11 PM, D&B Lambert wrote:
>> >I've also been battling the vibrating/rattling gearshift lever on my TR3A
>> >for some time now.  A few years ago (maybe 20K miles) I replaced the
>> >driveshaft u-joints and had the shaft balanced.  Some months ago I got a
>> >copy of the Service Bulletin (mine is a little different than the one Randal
>> >posted) concerning gearshift rattles and performed the recommendations:  I
>> >enlarged the trapezoid hole in the lever cap, and also tried the short piece
>> >of rubber tubing on the lever, neither of which made a bit of difference,
>> >except for making it much more difficult to shift into reverse.  I've
>> >machined some shims/buffers out of Delrin for under the cap to prevent metal
>> >to metal contact in that area.  No luck.  I tried a stiffer/weaker gear
>> >lever spring.  No difference.  I tried hollowing out the gearshift knob and
>> >epoxying in a metal slug for dampening, again no luck.  On that note, I have
>> >tried at least 4 different gear shift knobs (including an original hard
>> >rubber one) with no change in the vibration.  The vibration and resultant
>> >chatter/rattle is much more sever when accelerating.  I'm now into the habit
>> >of steering with one hand and holding the gear lever with the other to
>> >somewhat dampen the rattle.  I'm kind of out of ideas, so I am following
>> >this thread closely.  Anyone have any other ideas?  Is the torpedo-shaped
>> >counter weight available anywhere?  Does it really do anything? Couldn't I
>> >just make one out of a slug of steel and fab a bracket of some sort, or does
>> >it have to be a certain weight to cancel a specific harmonic?  I dunno....
>> >Any suggestions?  Perhaps I need to revisit the driveshaft/u-joints?
>> >Thanks for wading through this.
>> >Dennis


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