I didn't disconnect the switches. I merely disconnected the bullet
connector at the yellow wire on the wiring harness - this is the power
feed that goes to the wire leading to the 3rd/4th gear switch which then
goes to the solenoid. Thus no power to the O/D.
Although I thought the surging was akin to switching the OD on/off/on at
the time (since I had just switched the OD off), perhaps its more like
accelerating/deaccellerating in maybe 2 second intervals, making me think
throttle valves? Since it has only happened three times now, it is likely
going to be hard to locate the problem. I should mention also that I am
using HS carbs rather than the HIFs on this car (72 B). The drive train and
carbs are transplants from my rusted out 71BGT although I do have spare
HIFs in the garage. Call it sentimental reasons - I've been using these
carbs for 21 years now with several rebuilds, including
throttleshafts/bushings being replaced about 12 years or so ago..
David Councill
67 BGT
72 B
At 06:29 PM 9/29/2004 -0500, Lew Palmer wrote:
>David,
>
>Are you sure you disconnected the lockout switch and not the reverse light
>switch? On many transmissions, they're on opposite sides of the transmission
>at about the same location.
>
>Cheers,
>Lew Palmer
>-----Original Message-----
>From: owner-mgs@Autox.Team.Net [mailto:owner-mgs@Autox.Team.Net] On Behalf
>Of David Councill
>Sent: Wednesday, September 29, 2004 12:54 PM
>To: mgs@Autox.Team.Net
>Subject: surge-o-matic
>
>I'm pondering my latest quirk with my 72B. Maybe someone here will see this
>problem and recognize it.
>
>A few weeks ago, I was cruising down hill on the way to work, downshifted
>my OD, and right after that, the car started surging, as if the overdrive
>was engaging and disengaging while I was in third gear. Didn't do it in
>second. I thought maybe the switch was not cutting off power, making the
>connection go on and off and back on. So I unplugged the connection of the
>OD to the wiring harness, figuring I'd deal with the switch later. That
>appeared to take care of the problem.
>
>But then yesterday, same place and roughly same time in the morning, the
>surge comes back in third gear. But once I hit the 25 mph zone, the problem
>goes away and car runs great as usual the rest of the day. So at that
>point, I'm wondering how my OD could engage with no power.
>
>Then this morning, I hit the same stretch and no problems. But when I hit
>the downtown area at 25 mph, I got a similar but much less discernible
>surge. The previous surge was sharp and abrupt much like I would have
>gotten engaging/disengaging the OD. No indications at idle - very steady
>(yesterday I coasted in neutral during the surge and idle was perfect and
>steady). No misfirings at all. So now I think I misdiagnosed the whole
>thing and it must be fuel or carb related. Any ideas? A weather front is
>coming through tomorrow with a chance of snow so I'll likely park the car
>in the garage and maybe look at the carbs (possible take them apart and
>clean them), and drive the BGT in the meantime.
>
>David Councill
>67 BGT
>72 B
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