I have had my diff rebuilt by John Esposito at Quantumechanics in Connecticut.
His website is "under construction" now, but you can email him at
john@quantumechanics.com or call at (203) 463-8299. For years he has been the
"gold standard" for all things British that have gears in them (diffs,
overdrives, transmissions). But hurry - none of us are getting any younger...
> On 07/02/2020 1:39 PM jpaynepbr@cox.net wrote:
>
>
> Dave,
>
> Any competent off road shop can do this for you, my experience has been that
> if you bring them the parts, they can run through it in a few hours.
>
> I replaced a broken ring and pinion on my TR3 a few years ago, the shop labor
> was less than $200
>
>
> -----Original Message-----
> From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of Dave MacKay
> Sent: Thursday, July 2, 2020 9:24 AM
> To: triumphs@autox.team.net
> Subject: [TR] Replacing or rebuilding TR3A differential
>
> The pinion gear in the 3.7:1 differential of my 1960 TR3A (s/n 68639L) broke
> a couple of teeth so that now I need to rebuild the differential and replace
> the crown and pinion gears. Iâ??m intimidated by the repair because it looks
> like the repair requires more expertise that I have and because the TR3
> service manual specifies special Churchill tools that I donâ??t have and that
> seem to be unavailable.
>
> The idea of replacing the differential rather than rebuilding it holds
> considerable appeal. Iâ??d welcome any suggestions from the list about
> - Where I might be able to source a working diff to replace mine with?
> - Any readily-available rear ends that I might be able to swap in (e.g., from
> another model or make of car)?
>
> If a replacement isnâ??t feasible, Iâ??d appreciate input from the list about:
> - Shops/mechanics that have experience rebuilding Triumph differentials
> - Where I could buy/rent/borrow the special Churchill tools that the service
> manual specifies
> - Alternatives to the Churchill tools (S101, M84, S4221, S103, M70, TS1, M85,
> S132/2)
> - Advice about other tools that will be needed (e.g., what size press) or
> outside services that would make the job easier
>
> Of course any tales from those that have been there/done that would also be
> welcome.
>
> Thank-you,
>
> Dave MacKay
> 1960 Triumph TR3A, s/n 68639L
> near Toronto, Canada
> ** triumphs@autox.team.net **
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