healeys
[Top] [All Lists]

[Healeys] BN6 Overdrive

Subject: [Healeys] BN6 Overdrive
From: nmcd10 at gmail.com (Neil McDonald)
Date: Mon, 2 Jan 2017 23:08:15 +0000
References: <B3AAE6AF-5302-4A44-BFB1-9EDE5A94B072@gmail.com> <e9fb9dfb-72e9-0636-62cd-755231f83708@comcast.net>
Thanks for the replies so far. Pleased that nobody yet is suggesting OD 
internal mechanical problems. What about cleaning out the mysterious oil 
passage that might be blocked? 

I concluded that electrics are OK because the solenoid is brand new and moves 
and holds the hydraulic valve actuating lever when called upon.
_____________________
Neil McDonald

Email: nmcd10 at gmail.com


> On 2 Jan 2017, at 21:11, Bob Spidell <bspidell at comcast.net> wrote:
> 
> The OD and gearbox share fluid supply.  Take the car out for a run to get the 
> fluid warmed-up, then get it up on a rack--preferably--or SAFELY on 
> jackstands, as high as they'll go. There is a dipstick on top of the gearbox; 
> check your fluid level before emptying--if it's low that could be at least 
> part of your problem.  There is a drain plug on the bottom left side of the 
> gearbox, and a big brass disk on the OD.  Older cars had a sensible square 
> 'nut' on the OD plug, which can be turned with a big crescent wrench, and 
> newer ones have a notched disk that requires a tool to be undone properly, 
> but you can use a brass punch and hammer or other method.  When you drop the 
> brass plug, there should be a cup-shaped screen and, possibly, a couple of 
> soft, circular magnets.
> 
> Let the fluid drain completely, then re-install the gearbox and OD plugs, 
> being sure to a) place the magnets inside the plug and b) place the screen on 
> top of the magnets.  It's difficult to stop leakage from the OD plug; use a 
> new fiber washer and, possibly, some teflon tape on the threads of the plug 
> (being careful to not get any inside the OD).  Top off with the fluid of your 
> choice--'book' is 30W non-detergent, but most motor (20W-50) and synthetic 
> gearbox oils work well--checking the level often with the dipstick.  Should 
> take about 3.75 quarts.
> 
> Don't know how you 'persuaded myself that the OD electrics are fine,' but my 
> money's on the electrics--esp. the relay.
> 
> Bob
> 
> 
>> On 1/2/2017 10:56 AM, Neil McDonald wrote:
>> One of my New Years resolutions, before I put the car back on the road after 
>> sitting in the garage for several years, is to fix the overdrive so the car 
>> is comfortable highway driving. It once (and once only) went into OD once 
>> very briefly - which suggests that nothing mechanical is broken.
>> 
>> So far I have persuaded myself that the OD electrics are fine and there is 
>> adequate hydraulic pressure - around 390 psi if I recall correctly. I have 
>> also checked the hydraulic valve adjustment using the "drill through the 
>> actuating lever" method but not the direct "is the valve ball lifting by at 
>> least 1/32 inch when the solenoid is actuated?" method.
>> 
>> Somewhere I read that there is a small passage around the hydraulic valve 
>> area which can get blocked and thus needs cleaning out with a wire. Is there 
>> an internet link elaborating on this?
>> 
>> Online research also suggests that I should change out the OD fluid which is 
>> certainly old and a significant amount could have leaked out. I assume that 
>> the gear box has a drain and filler plug but have yet to find them. Should I 
>> refill to just short of overflowing or ......?
>> 
>> I don't have the resources to pull and strip the OD myself so am hoping that 
>> I can get it working without hiring a professional. Does anyone have any 
>> words of wisdom and/or comfort?
>> _____________________
>> Neil McDonald
>> 
>> Email: nmcd10 at gmail.com
>> 
>> 
>> 
> 
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> 
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
> 
> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/nmcd10 at 
> gmail.com
> 

<Prev in Thread] Current Thread [Next in Thread>