Transmission and clutch · Carrollton, Texas
A transmission fault is a symptom, not a diagnosis.
SSG and DCT fluid service, SAV block cleaning, dual clutch calibration and proper fault diagnosis before anyone quotes you a gearbox.
Before you replace anything
A transmission warning on a McLaren is alarming, and it is often quoted that way. In this shop the same fault has turned out, more than once, to be metal debris collecting in the SAV block rather than anything wrong with the gearbox itself.
The difference between cleaning a block, flushing the transmission and clutch and recalibrating the dual clutch, and replacing a unit, is measured in tens of thousands of dollars. It is worth finding out which one you have before authorising either.
Transmission fluid is due at four years or 40,000 miles on SSG and DCT gearboxes, whichever comes first. That is a calendar item, so a low-mileage car can be two intervals behind while the odometer says the car is barely run in.
The work
Every gearbox job starts on the McLaren Diagnostic System with live data and a road test. Parts come after that, not before.
MDS reads the transmission control module directly, including pending faults and adaptation values, and we log live data on a road test. A warning light narrows the field; live data tells you what the clutch and the hydraulics are actually doing.
Metal debris in the SAV block shows up as a transmission fault on 600LT and 570S cars in particular. The block is removed and cleaned, the system flushed, and the source of the debris identified rather than left to come back.
Full transmission and clutch fluid service to factory specification at the four-year or 40,000-mile interval, with the correct fill procedure and temperature window. This is one of the jobs most commonly done wrong by a shop working from a generic procedure.
After any clutch or fluid work the clutch has to be recalibrated on the factory tool.
Beneath the car
Transmission fluid on its four-year cycle, with condition noted against mileage rather than assumed clean.
Driveline mounts, axles and the SAV block inspected from below, where metal debris problems first show.
Gearbox behavior checked under load and recalibrated where the car calls for it, not on a guess.
How a gearbox job runs
Full fault read, live data logging and a road test before anything comes apart.
You get the findings, photographs and the cheapest correct fix first.
Block cleaning, fluid service or clutch work to factory specification.
Dual clutch calibration, road test, final scan and a written record.
Diagnosis is usually same-day. Fluid and clutch work typically takes two to four business days depending on parts.
Transmission and clutch
The gearbox tells us, before it tells you.
Where we work
The car stays here for the road test as well as the work, because a gearbox fault that only appears warm is not something you diagnose in a bay.
If the car will not select a gear, we collect it. Do not have it flat-towed by someone who has not asked how the transmission is configured.
Owners regularly arrive holding a dealer quote for a replacement unit. We are happy to read the car ourselves and tell you whether we agree.
Why March Motorsports
The reason this work goes well here is repetition. The same faults come back around on the same models, and having seen a 600LT transmission fault before is worth more than any amount of general exotic experience.
We quote the fix we believe is correct, in writing, with the data behind it.
The 600LT and 570S transmission faults are known ground here, not a first attempt.
MDS reads adaptation values and closes calibration properly. Generic tools cannot.
We rule out the inexpensive causes before anyone talks about a gearbox.
Areas we serve
Our Carrollton workshop serves owners throughout Dallas-Fort Worth, with collection and delivery available across the Metroplex and enclosed transport arranged statewide.
Explore all service areasWhat owners say
1 month agoRecently dropped a McLaren 600LT off for a PPI. Dalton and the team were super helpful. They know these cars well and identified issues I don't believe another shop would have caught.
1 month agoDalton at March Motorsports is the real deal. He answered every question honestly, never pushed me, and went out of his way to help. Their inspection work is thorough and transparent.
1 month agoMcLaren has been my dream car to own and March Motorsports helped me from start to finish. I recently purchased a McLaren 720S from March Motorsports and it has been an amazing experience.
2 months agoDalton and the team have taken excellent care of my 2019 McLaren 570S for 2 years, from regular service to complex repairs, exhaust and ECU performance upgrades.
2 months agoDalton helped me out tremendously. Couldn't have asked for a better experience. He directed me the right way on a McLaren I was looking to buy.
2 months agoPerformed 6 year service on my 600LT Spider. 5/5.
2 months agoAll work was performed, as promised, to their and my exacting specifications. Dalton was very responsive throughout the whole process.
2 months agoExceptional work, honest communication, and true expertise. If you own a McLaren, this is the kind of mechanic you want in your corner.
1 month agoRecently dropped a McLaren 600LT off for a PPI. Dalton and the team were super helpful. They know these cars well and identified issues I don't believe another shop would have caught.
1 month agoDalton at March Motorsports is the real deal. He answered every question honestly, never pushed me, and went out of his way to help. Their inspection work is thorough and transparent.
1 month agoMcLaren has been my dream car to own and March Motorsports helped me from start to finish. I recently purchased a McLaren 720S from March Motorsports and it has been an amazing experience.
2 months agoDalton and the team have taken excellent care of my 2019 McLaren 570S for 2 years, from regular service to complex repairs, exhaust and ECU performance upgrades.
2 months agoDalton helped me out tremendously. Couldn't have asked for a better experience. He directed me the right way on a McLaren I was looking to buy.
2 months agoPerformed 6 year service on my 600LT Spider. 5/5.
2 months agoAll work was performed, as promised, to their and my exacting specifications. Dalton was very responsive throughout the whole process.
2 months agoExceptional work, honest communication, and true expertise. If you own a McLaren, this is the kind of mechanic you want in your corner.
Book it
Send the fault code and describe when the fault appears, cold, warm, low speed or under load. It changes where we look first.
Questions
Every four years or 40,000 miles on SSG and DCT gearboxes, whichever arrives first. It is a calendar interval, so a car that covers very few miles can still be overdue.
Usually not. On 600LT and 570S cars in particular, metal debris in the SAV block produces a transmission fault that is resolved by cleaning the block, flushing the system and recalibrating the clutch.
It is part of the hydraulic circuit that operates the gearbox. Debris collecting in it disturbs the pressure the transmission relies on, which the control module reports as a transmission fault.
The car learns the clutch take-up point over time. After fluid or clutch work those learned values are wrong, so the adaptation is reset and relearned on the factory tool, then verified on a road test.
Yes, and those faults are exactly why the car goes out on a road test with data logging rather than being assessed in the bay.
Do not. Call us and we will collect it, so that nothing is made worse by a tow arranged without knowing how the transmission is configured.
Yes, factory specification fluid, filled with the correct procedure and temperature window, with part numbers recorded on your invoice.
Yes. Owners bring us replacement quotes regularly. We read the car ourselves and tell you plainly whether we reach the same conclusion.
