Transmission Repair near Sloatsburg, NY

“The shop is run by Serge — hands down one of the most technically gifted mechanics I’ve met.
I first met him back in the early Audi tuning days, when he was one of the first guys to both turbocharge and supercharge a B6/B7 A4. This was before off-the-shelf everything. Back then, he was building cars properly — custom hardware, custom calibration, tuning on Maestro when the Audi scene still required actual understanding of ME7 logic, load modeling, fueling strategies, and knock control instead of flashing files and hoping for the best.
From there it escalated quickly.
Tesla drivetrain swaps into Audi chassis (including an S5) — full custom wiring, CAN integration, and making it all communicate cleanly with Audi MMI, cluster logic, and factory controls. That alone weeds out 99% of shops.
On the ICE side, he’s built performance engines from the block up, handled motor swaps, full rebuilds, and bespoke turbo systems, and fabricated his own solutions when parts didn’t exist. His TIG welding work on custom turbo manifolds and exhaust setups is the kind of stuff you normally only see in high-end motorsport or boutique race shops.
What really separates Serge, though, is diagnostics.
He has an almost unfair ability to trace electrical faults, drivability issues, and intermittent problems that other shops miss entirely. If ten mechanics couldn’t find it, he usually does — methodically, logically, without guessing. It’s not magic; it’s deep systems-level understanding.
I’ve trusted him with six Audis over more than 12 years — everything from routine maintenance to engine swaps, rebuilds, suspension work, and custom performance setups. Every job was done clean, properly torqued, correctly routed, no shortcuts, no “that’s good enough” mentality.
On top of all that:
Work is clean and documented
Attention to small details most people overlook
Pricing is fair for the level of work
And he’s genuinely enjoyable to deal with — no ego, no bullshit
At this point he’s deep into the supercar world, but the mindset hasn’t changed. Same precision, same standards.
Top-tier mechanic.
Top-tier owner.
The kind of shop you don’t replace once you find it.

P.S. last car he worked on (4.0t twin turbo S6) made 923whp on e40 on a mustang dyno.”

“This place was fantastic! I blew a tire on my travel trailer on the Thruway And I was towed to Mahwah To a tire place that was supposed to have what I needed. When we got there, they didn’t and I called at least a dozen local tire places with zero success. I called this place and the guy was so helpful although he did not have the exact tire I needed. He was able to sell me another one that was very similar. I ended up buying two which meant I needed to drive back to my trailer. Install the one tire bring the trailer back to him to install the second tire. The place stayed open an hour later for a complete stranger and saved my family vacation!!!! Had it not been for them my travel Trailer would have been sitting in the middle of a grocery store parking lot certainly overnight. My food would have spoiled and we never would have been able to get back on the road the same evening. Good people still exist! Luckily I live pretty local and will be using them from here on out!”

“Jonathan and team are so helpful, so accommodating, and very informative. They explain things really well, their prices are reasonable, and they do great work. When my tire pressure light came on right after the services, Jonathan was happy to check and fill my tires for me. I’ve recommended them to a neighbor as well who was also very pleased with their services. Thanks guys!”

“Great place. Explained everything in simple terms that I could understand. They are great with communication. Very kind. Would definitely return for future help with the car. Highly recommend.”

“Vehicle would reverse at idle, but would not accelerate in reverse. If vehicle was parked nose down on a slope, would not back-up due to slippage in transmission. Took it in to R&J.
Todd is a straight-shooter, honest guy, very thorough and collaborative. Transmission is fixed and
I would recommend R&J to anyone with transmission issues.”

“Just walked in here to get the auto insurance inspection and the owner (Mr. Bounty) went above and beyond to help me. Will definitely recommend this place for auto repairs and inspection.”

“I had my 2008 Ford F-250 brought in after some shop screwed up my front end at a place in Ny state. Total Performance is the best shop in the AREA hands down , the guys fixed my front end, rebuilt my rear due to it was howling, starter replaced , and now I’m bringing my truck back for more work to be done cause Ford sucks when it comes to rotting. My truck is lifted with 37x12.50r17 2 door supercab with an 8 foot bed. I couldn’t be more happy with the work they have done all the times replacing those parts that I listed, and the staff are amazing and I can’t forget the owner and his lovely wife that helped me with my quotes. If your looking for a Professional 4x4 Specialist’s either Diesel or Gas or even a car I would highly recommend Total Performance In Mahwah. Thanks Total Performance for saving my truck !!”