Driveshaft u-joints caused this.
Barry
From: Mike Harmuth via Fot <fot at autox.team.net>
To: FoTTriumph <fot at autox.team.net>
Sent: Sunday, June 3, 2018 3:05 PM
Subject: [Fot] Beaten by equipment
I had a new failure this weekend at Lime Rock with the Spitfire. 1st lap of the
weekend, doing a sedate warm up around the track under full course yellow. When
I start down the front straight and put it in 4th gear, there's a big vibration
and ugly noises (short video attached). I was flat towed back to the paddock
and when I took the tranny hump cover off, I found the shifter had snapped (see
picture). A little more poking around and I discovered the aluminum bell
housing was cracked from side to side and two bearing caps were missing from
the tranny end of the driveshaft u joint (replaced over the winter).
I'm going to pull the tranny, driveshaft and diff to see what damage has been
done. In the past, at the same spot at Lime Rock, I had a problem with the diff
that 1st broke the tranny output housing. I didn't realize the problem was
downstream, it locked up again (broken tooth inside floating around) and took
out the rear? 1/2 shaft u joints putting me in the wall.
After rewatching the video, many times, I suspect the broken shifter was the
cause of the problem, (2 gears at once?) not a result but I'm pretty sure
disassembly of the tranny will confirm this. My question is, has anyone had the
shifter beak like this and if so, was it caused by something else or was it
just metal fatigue?
Other related info, new engine (1296) , more power than the old one, less than
an hour on it. Zero track or dyno time, this was the 1st time the car saw 4th
gear. All drivetrain fluids changed over the winter. No disassembly but cover
off inspections and hand turning tranny and diff felt normal, last used in
October 2017 with no issues, with old, worn out engine.
I will get this going for the K Cup, see you there.
thanksmike h
???Front.mp4?
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