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Thread: Quantum Mechanics John Esposito Quality overdrive parts

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    Jedi Knight Got_All_4's Avatar
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    Quantum Mechanics John Esposito Quality overdrive parts

    Did a Google search and nothing came up for Quantum Mechanics. Looking for some quality overdrive parts for my J-type overdrive. Particularity the 3 main bearings. I was warned about the ones Moss sells as they do not last. Is John still in business or what's going on?

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    Great Pumpkin TR3driver's Avatar
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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    His website has been "under construction" for a long time. But he was still in business the last I heard.
    https://www.quantumechanics.com/

    FWIW, I've had no trouble with the bearings I got from TRF.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    I was hoping TRF has a overdrive rebuild kit unless I missed something. Doing some research last night I found Rimmer brothers has a complete kit for rebuilding J-types.

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    When I was rebuilding it was almost like the big 3 had cooperated so that each carried different parts, none carried any parts the others did, and between the 3 you could almost get what you needed. So, “no”, there is no rebuild kit that I know of. It would be nice to know if there is a supplier who does carry everything.
    John

    1955 TR2

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Beware of buying anything from England that contains bearings. I bought an OD rebuild kit from Rimmers and it got hung up in customs for over a month and cost me a couple hundred dollars in fees and storage. Bearings are a redflag item since they apparently have a duty on them. I have talked to other people who have bought the kit and had no problems. You roll the dice and take your chances.
    1968 TR250 "TRminator"
    Frame off Rotisserie Nut and Bolt restoration completed by myself and brother 2014

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Thanks for the warning TR250 Guy that would be a big concern. Sorry to hear about your dilemma. My mechanic has a contact that rebuilds Stags and orders a lot from Rimmer Brothers almost every week. He is checking with him first. Hopefully that may make a difference.

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Try overdrive repairs in england,I order overdrive parts from them all the time and have no problems shipping to me in california
    Phil

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Thanks Phil got a link or something?

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    https://www.overdrive-repairs.co.uk/buy-spares.php

    sorry to early,they also have the best pricing
    Phil

    heres the orings as well
    https://www.ebay.com/itm/Seal-Kit-J-...yUYs:rk:1:pf:0
    Last edited by philstr6; 01-30-2019 at 06:44 PM.

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    I recently (kind of recently) purchased an entire OD transmission from John Esposito and I recommend contacting him by e-mail rather than through the web-site. I received responses within a day and am (to this point) 100% satisfied. He ha# parts as well as complete assemblies.

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    I too have had a very good experience with John at Quantum. I'm fortunate to only live about an hour from his shop so I had him rebuild my OD A type tranny instead of sending it to Macy's Garage. I felt his pricing and service was excellent and have had no issues for the past 2 driving seasons.

    Bill
    TS63273L
    Bill

    '59 Triumph TR3A TS63273L

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Nice! I my mechanic is going to call him. Going to compare his info he gathered with local bearing suppliers and other links I've supplied.

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    If you can find a number on the bearing, you can get a good-quality Timken bearing from any number of places. Even Amazon! Many non-Timken bearings use the Timken numbers, and your OD might have Timken bearings in it already.

    Bearings are a dilemma for me. I don't like to replace good-quality, unworn bearings simply because they are old. On the other hand, everything has a lifetime, and it's possible that an old bearing has invisible flaws. But, generally, if they are good quality, smooth and don't show any significant wear, I usually don't replace them. I'd never replace them with a cheapo or no-name bearing.
    Steve Maas
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    1960 Austin-Healey "Bugeye" Sprite, sold 2010: http://www.nonlintec.com/sprite
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    Great Pumpkin TR3driver's Avatar
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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    If you do find the Timken numbers, let me know and I'll add them to the SPC.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    Another very positive vote for John Esposito at Quantum Mechanics!

    After a botched overhaul by a friend of a friend in 2002 I boxed up my transmission and OD and shipped to John. Now after about 46,000 miles of totally incident free driving I can vouch for John's quality work. John recommended a name brand 30w non-detergent fluid. Hey if he had said use raw male kangaroo urine, that's what I would use!

    Lou Metelko
    Auburn, Indiana
    54 TR2LD

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    Re: Quantum Mechanics John Esposito Quality overdrive parts

    My mechanic said he bought some quality bearing locally from Allied Bearings. I'll look at them and get the numbers for ya. I still asked him to call JE for advice.

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