Since you've tried most everything else - how about checking backlash
of 'pinion to crown gear'. And the 'planet gears'.
Put tranny in neutral and try turning differential 'input flange' back
and forth to feel if backlash is close to .03" with parking brake on.
Mine was darn near 1/8 inch of slop before rebuilding (with the help
of Hardy Prentice). The planet gears are less direct (forward and back
direction) since they 'equalize' the two rear wheels to each other,
but they can easily wear the brass thrust washers thin making for
'side to side' slop that ends up making clunks. Leave one rear wheel
on ground and try turning other rear wheel back and forth (but
driveshaft must be locked down somehow to isolate the planet gear
action). Should be thousandths of an inch play there as well (not
1/8's or 1/4's").
Good luck,
Carl
'63 TR4 since '74
On Aug 10, 2010, at 11:00:02 AM, triumphs-request@autox.team.net wrote:
Ever since its restoration many years and thousands of miles
ago, my brother's
'76 TR6 has made a "clunk" when changing direction as in
backing up, then going forward or going forward, then backing up.
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