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June 2024 by JAG
Picked up a transmission for my MGTD, met John the owner great guy very knowledgeable with the British marquee
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February 2024 by christopher silvestri
The best for Gearbox rebuilds, Christopher John LTD uses them exclusively
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August 2023 by Mark M.
The 1970 MGB overdrive transmission that John Esposito's shop overhauled for me works awesome. No surprises, extremely professional and clearly laid out what was to be done. I can't thank them enough. Mark
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June 2023 by Lee Gilbert
Very professional, very busy, but always gets back, email correspondence is best. Meets all commitments. Offers transmission and overdrive products for classic British cars not available elsewhere. Highly recommended.
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January 2023 by Greg H
Quantum Mechanics, LTD is great. John refurbished a transmission and J-Type overdrive unit for my **** ******* **** The work was completed on-time and for the quoted price. I had the units installed in my car and they have operated flawlessly. John is easy to talk to, honest and a very experienced technician. I would recommend him to anyone who owns a British specialty car (and other European and Japanese makes) and I know they will be happy with the service.
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October 2022 by Greg Chait
The very best at rebuilding early MGB overdrive gearboxes.Services: Transmission repair
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October 2022 by Alid Reed
Brilliant service.
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October 2022 by Gregory Marshall Chait
I have used John Esposito of Quantum Mechanics to rebuild English overdrive gearboxes, mostly MGBs and TR6s, for almost 20 years. His work has always been superb, but I just had an extraordinary experience with him that I thought worth sharing. Three weeks ago, I shipped John a late 1967 Type D three synchro overdrive gearbox for my 1967 MGB roadster. At John's suggestion, I also shipped him my car's original non-overdrive three synchro gearbox for parts. The gearboxes took a week to arrive at John's shop by UPS. Within two days, John had disassembled both gearboxes, diagnosed the faults in the overdrive gearbox, determined which parts he could use out of the parts gearbox and which parts he would have to provide, and sent me a detailed written estimate for my approval. The parts gearbox saved time and money. John promised a four week turnaround. John emailed me last Friday that he had finished rebuilding the overdrive gearbox and was leak testing it over the weekend. It has been shipped to me by truck freight - a two and a half week turnaround. John's final bill was less than his estimate. In addition, John gave what I consider a generous a credit for the remainder of the parts gearbox that he did not use in my build. I
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October 2022 by Greg C.
I have used John Esposito of Quantum Mechanics to rebuild English overdrive gearboxes, mostly MGBs and TR6s, for almost 20 years. His work has always been superb, but I just had an extraordinary experience with him that I thought worth sharing. Three weeks ago, I shipped John a late 1967 Type D three synchro overdrive gearbox for my 1967 MGB roadster. At John's suggestion, I also shipped him my car's original non-overdrive three synchro gearbox for parts. The gearboxes took a week to arrive at John's shop by UPS. Within two days, John had disassembled both gearboxes, diagnosed the faults in the overdrive gearbox, determined which parts he could use out of the parts gearbox and which parts he would have to provide, and sent me a detailed written estimate for my approval. The parts gearbox saved time and money. John promised a four week turnaround. John emailed me last Friday that he had finished rebuilding the overdrive gearbox and was leak testing it over the weekend. It has been shipped to me by truck freight - a two and a half week turnaround. John's final bill was less than his estimate. In addition, John gave what I consider a generous a credit for the remainder of the parts gearbox that he did not use in my build. I recommend John and Quantum Mechanics without reservation.
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October 2022 by Greg C
I have used John Esposito of Quantum Mechanics to rebuild English overdrive gearboxes, mostly MGBs and TR6s, for almost 20 years. His work has always been superb, but I just had an extraordinary experience with him that I thought worth sharing.Three weeks ago, I shipped John a late 1967 Type D three synchro overdrive gearbox for my 1967 MGB roadster. At John's suggestion, I also shipped him my car's original non-overdrive three synchro gearbox for parts. The gearboxes took a week to arrive at John's shop by **** Within two days, John had disassembled both gearboxes, diagnosed the faults in the overdrive gearbox, determined which parts he could use out of the parts gearbox and which parts he would have to provide, and sent me a detailed written estimate for my approval. The parts gearbox saved time and money. John promised a four week turnaround.John emailed me last Friday that he had finished rebuilding the overdrive gearbox and was leak testing it over the weekend. It has been shipped to me by truck freight - a two and a half week turnaround. John's final bill was less than his estimate. In addition, John gave what I consider a generous a credit for the remainder of the parts gearbox that he did not use in my build.
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October 2021 by melody laurel
Have purchased rebuilt classictransmissions from here for years. One year warrenty.
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June 2021 by Rick Pietz
John and his crew are extremely knowledgeable when it comes to the Laycock overdrive units. I relied on him to properly rebuild the overdrive in a Ferrari 330. Great work!
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April 2021 by myhockeyplayers
Very knowledgeable.
