[TR] Perplexing A-Type OD Problem

Sat Jun 27 17:00:36 MDT 2020

 I wish Randall a quick recovery as much as it can be.  I am also saddened to hear about his father.  John Young was a fine gentleman and I had the pleasure of meeting him on several occasions.  I guess that's the penalty of a long life, you loose so many good friends.
Thanks for the update.

Dave 

-----Original Message-----
From: andrew uprichard <auprichard at uprichard.net>
To: 'Bill Brewer' <billbrewer59 at yahoo.com>; 'Triumphs List' <triumphs at autox.team.net>
Sent: Sat, Jun 27, 2020 7:06 am
Subject: Re: [TR] Perplexing A-Type OD Problem

I recently went through FOUR aftermarket voltage regulators on a TR4.  They came from different vendors and lasted anywhere from a few minutes to a few weeks.  I sourced an original from Marv Gruber and it has worked fine ever since.  What are the chances you could get your hands on a nice original solenoid?  Randall Young is in a rehab hospital (Kindred hospital in Pasadena) following a stroke.  I have spoken to him several times and encouraged him to comply with the physical therapy as there were so many TRs waiting for his advice!  It has been a bad year for him – his father died just a few months ago.  Andrew UprichardJackson, michigan  From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Bill Brewer
Sent: Friday, June 26, 2020 10:00 PM
To: Triumphs List <triumphs at autox.team.net>
Subject: [TR] Perplexing A-Type OD Problem  Hi Listers,     I was on a trip driving my TR3 that has a TR4 overdrive trans in it. The OD had been working fine and then suddenly nothing would happen when I threw the switch. I checked the relay with a test lamp and the C2 output terminal (yellow/purple wire) lights up fine but the solenoid wouldn’t actuate. I tested the solenoid (Moss – aftermarket) on my workbench and it seems to pull in fine. It probably only has 5,000 miles on it and looks almost new. I put it back in the car and it doesn’t actuate. I ran a new wire straight from the C2 terminal on the relay to the installed solenoid and it still doesn’t actuate, although I can move the actuation lever by hand. Evidently the solenoid is bad again. It seems like I go through OD solenoids fairly regularly. Randall (does anyone know how he is doing???) had me install a small “bounceback resistor” on the from the C2 output terminal on the relay to ground to eliminate bounceback voltage spikes. Any idea why I would be going through solenoids so regularly? I seem to change them out about every 10,000 miles.     Could it be a grounding issue for the solenoid? It seems like there would be plenty of electrical continuity from the transmission to the engine and chassis, so that shouldn’t be it.     Thanks in advance,       -Bill Brewer** triumphs at autox.team.net **

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