Great detail, Jerry. Iâ??m not sure Iâ??m up to the task, but your guidance is
pretty much everything Iâ??ll need if I do decide to tackle it.
That switch must be the only metric thread part on these cars.
Thanks again.
Dean
Sent from my iPad
> On Apr 20, 2020, at 6:56 PM, Jerry Van Vlack <jerryvv@roadrunner.com> wrote:
>
> Dean,
>
> Disassembly of at least the reverse rod should be done. The most difficult
> issue with this is removal of the small square headed tapered bolt / pin. It
> can easily be broken. I'd recommend getting an 8 point socket that fits it
> tightly and don't apply any sidewise force when loosening the bolt. A firm
> initial rotation should get it started.
> Locate. Drill and tap the isolator switch hole.
> Assembly of the rod is pretty straight forward but you have to make certain
> you get the little ball inserted properly. The ball keeps you from engaging
> it's rod incorrectly. There is also a cap, spring and pin that helps lock the
> rod in place when you shift. Count the turns of the cap when you remove it
> and replace with the same number of turns making certain it's at least flush
> with the sealing surface of the top cover. All of the disassembly and
> reassembly is well covered in the factory service manual.
>
> Hope this helps, write to me with any additional questions.
>
> I have the tap if you'd care to borrow it when the time comes. Don't know the
> drill size but can look it up based on the tap size. I don't have the drill,
> my shop did.
>
> JVV
>
> -----Original Message----- From: Dean Mericas
> Sent: Monday, April 20, 2020 6:30 PM
> To: Jerry Van Vlack
> Cc: triumphs@autox.team.net
> Subject: Re: [TR] Retrofitting a reverse light switch on a TR4
>
> Thanks, Jerry. Is the disassembly of the cover very involved? It looks like
> at least one of the shift rods needs to be removed prior to drilling.
>
> Dean
> Sent from my iPad
>
>> On Apr 20, 2020, at 4:54 PM, Jerry Van Vlack <jerryvv@roadrunner.com> wrote:
>>
>> It's pretty easy, drill and tap the top cover on the boss where the
>> reverse light switch would go and buy an OD isolator switch. The shift fork
>> is already cast to turn the switch on and off.
>>
>> I think the instructions are in the Factory service manual. Need the correct
>> tap and drill. I believe the tap is metric. If you need more info write to
>> me and I'll try to drill it down further.
>>
>> I've done it.
>>
>> JVV
>>
>>
>> -----Original Message----- : Dean Mericas
>> Sent: Monday, April 20, 2020 5:45 PM
>> To: triumphs@autox.team.net
>> Subject: [TR] Retrofitting a reverse light switch on a TR4
>>
>> Iâ??ve got the transmission on the floor of my shop, and am wondering if I
>> should take this opportunity to install a reverse lamp switch. How big a
>> deal is the retrofit?
>>
>> Thanks.
>>
>> Dean
>> 1965 TR4
>> 1974 Alfa Romeo 2000 GTV
>> 1976 Alfa Romeo Giulia Nuova Super 2L
>> Austin, TX
>> Sent from my iPad
>> ** triumphs@autox.team.net **
>>
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