[Healeys] test

Bob Spidell bspidell at comcast.net
Sat Dec 16 11:49:06 MST 2017

I can't think of any failure mode in an OD that would only occur when 
accelerating.  The pump and accumulator need to maintain a minimum 
pressure of 350psi or so, so you'd expect a weak pump or leaky 
accumulator to cause disengagement, or slow engagement, when slow or 
decelerating.   Throttle switch, relay and solenoid would most likely 
fail randomly.  I'd replace one at at time--starting with the 
switch--since it's the cheapest/easiest to replace--then go from there.  
I've had both a bad switch and relay cause random disengagement.  If 
it's not the switch, the relay can be carefully opened-up and the points 
filed, to prove it's the problem or not before replacing.


On 12/16/2017 10:17 AM, healeymanjim wrote:
> this is a test.  overdrive intermittently drops out when accelerating.  no specific conditions, just when accelerating.  may
> go days without doing this, then will do it every time i accelerate.  question. is it (a) solenoid (b) relay (c) throtlle switch
> (d) adjustment (e) all of the above.  TIA

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