[DeTomaso] Drifting Out of Third Gear - The Rest . . . . . . . of the Story
mbefthomas at comcast.net
Sun Jan 29 14:06:16 EST 2017
Interesting. I'll pass that back to Byron. Under normal circumstances, I
can't see there being much of a risk of the lack of a boot there allowing
much debris to compromise where the shaft enters the box.
Pres., Panteras Northwest
Yellow '74 #6328
From: Mike Drew [mailto:MikeLDrew at aol.com]
Sent: Sunday, January 29, 2017 10:58 AM
To: Mike Thomas <mbefthomas at comcast.net>
Cc: <detomaso at server.detomasolist.com> <detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Drifting Out of Third Gear - The Rest . . . . . . .
of the Story
Fwiw when Lloyd Butfoy rebuilds a gearbox, he removes whatever rubber boot
is on the shift linkage rod and throws it in the trash and does NOT replace
it, for the exact reason you experienced. I was surprised to see that, but
he was adamant about it.
Sent from my iPhone
On Jan 29, 2017, at 8:51, "Mike Thomas" <mbefthomas at comcast.net> wrote:
> So, I just put out a post regarding evidence of no wear on my
> non-steel syncros that Byron Sanborn, Vintage Racing Motors, sourced
> from Dennis for my ZF rebuild 6 years ago (checked my records). In
> there I mentioned something about the box drifting out of third gear. So,
here's the rest . .
> . . . of the story.
> I've been putting up with the box drifting out of third gear, and once
> or twice from first, for the past 3-4 years. It would usually be more
> frequent the box was cold, and usually when I would lift on the
> throttle, but unfortunately once or twice when under hard acceleration
> (ouch). I finally got fed up enough, after checking all my linkages
> and replacing a broken clutch lever arm which in its' weakened state
> prior to breaking I had attributed the third gear problem to, and
> pulled the box for Byron to take a look. Conversations on the phone
> prior led him to think that I may have compromised the engagement ring
> for some reason. Upon cracking the case and pulling the gear set out,
> he could see no evidence of wear, all the shifting forks were properly
> adjusted and everything was working as it should on his bench test.
> It wasn't until he had it buttoned back up and was working the shifter
> in hopes of finding a solution that he noticed that the aftermarket
> boot on the end of the shift rod at the shifter box was too thick and,
> when pushed back as it would be for third gear, was bunching up and
> not letting the arm move back enough to solidly engage third gear.
> So, he ordered what he thought would be the thinner OEM boots that
> they originally came with and which he also admitted were far too
> fragile, but what he received was the same thicker version that I had
> on there to start with. I had replaced that boot myself after the
rebuild, and even then recall being told the original versions were no
> So, he removed the collar from the shifter arm and machined the
> backside enough to allow the arm to fully engage. Now the pilot is
> out, I can put it all back together and take if for a drive to see if
> indeed this does solve the problem. All crossable appendages crossed ;-).
> Mike Thomas
> Pres., Panteras Northwest
> Yellow '74 #6328
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