[Healeys] Overdrive Setting Lever O-Ring

Tue Jun 29 21:58:22 MDT 2021

Only the  3 speed transmissions used a seal.  All the 4 speed transmissions used an O  ring. 

David Nock

Sent from my iPhone

> On Jun 29, 2021, at 7:02 PM, Harold Manifold <manifold at telus.net> wrote:
> 
> 
> I have an update. The OD Setting Lever is off but it put up a good fight. I tried a number of different methods but in the end a big hammer and stubby punch the right diameter worked. I first tried a 3/32 pin punch and smaller hammer but the punch bent without moving the pin. Next attempt was a home made punch from a nail with a short point and a bigger hammer. Again the point just bent and deformed. I rigged up a c-clamp and tried to press the pin out. Hard to keep straight and the pressing pin bent again. I was running out of ideas and discovered a T10 Torx bit is the right diameter and is hardened and stubby. I used a T10 Torx bit and extension from a cheap set and the biggest hammer I had and was successful.
>  
> I can confirm the pin is definitely a taper pin. The OE part number and description is “TPS0405     Pin - taper - lever to shaft”. Measuring the pin I removed it is a standard taper pin size 3/0, large end diameter 0.125”. The length is 5/8”. Both the holes in the shaft and lever are tapered with the big end towards the bottom of the transmission. There is another taper pin the same size on the shaft inside the overdrive so there is no way around removing taper pins to change the seal. I checked a BT7 and BJ8 parts list and both list TPS0405 as the pins. It looks like this is what was used on all Healey OD units.
>  
> My transmission has an o-ring on the shaft which looks to be in good shape but still leaked. Others on this forum pointed out originally there was a lip seal and I will replace the o-ring with the proper lip seal.
>  
> On the positive side the seal can be replaced without dismantling the OD and with the transmission still in the car.
>  
> Thanks for all your tips and suggestions.
>  
> Harold
>  
> From: Bluehealey via Healeys
> Sent: Tuesday, June 29, 2021 11:38 AM
> To: Steven Kingsbury
> Cc: Healeys at autox.team.net
> Subject: Re: [Healeys] Overdrive Setting Lever O-Ring
>  
> The hole is first drilled with the small end size then reamed with a tapered reamer to suit the pin.
>  
> Alan - from my iPad
> 
> 
> On 29 Jun 2021, at 19:23, Steven Kingsbury via Healeys <healeys at autox.team.net> wrote:
> 
> 
> The pin I removed was definitely tapered. As for drilling a tapered hole, I have no idea, but maybe one side of the lever was drilled one size and the other side a smaller size with the shaft going through the center drilled to a specific size. 
>  
> 
> On June 29, 2021 at 11:02 AM, David P <frogeye at porterscustom.com> wrote:
> 
> It's not tapered. How does one drill a tapered hole through?
> 
> On 6/29/2021 11:42 AM, Elton S via Healeys wrote:
> I also have the same leak. Once you find out the location of the big end of the tapered pin, could you let me know? Mine is buried in a few coats of paint.
> Elton
>  
> On Mon, Jun 28, 2021 at 2:42 PM Harold Manifold via Healeys <healeys at autox.team.net> wrote:
> Hello,
>  
> I have a leak from the O-Ring behind the Setting lever on the overdrive. I know the O-Ring can be replaced without disassembling the overdrive unit once the setting lever is removed. The setting lever on my overdrive is held inplace with a solid push pin. Likely the original pin. I have tried to remove the pin with the right sized punch but it doesn’t budge.
>  
> Before I break something, does anyone know what type of pin was likely used? Is it a straight pin or a tapered pin? If it is tapered pin any tips on figuring out which is the big end. There is always drilling but not the easiest place to get at.
>  
> Thanks…. Harold
>  
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