Best Clutch Kit for a 2015-2017 Mustang GT

Best Clutch Kit for a 2015-2017 Mustang GT

Best Clutch Kit for a 2015-2017 Mustang GT

If you own a 2015, 2016 or 2017 Mustang GT with the six-speed manual, the clutch shopping problem is not just "which stage." It is "which generation." The first three years of the S550 GT share their clutch hardware with the 2011-2014 Coyote cars, not with the 2018 and newer GT that looks almost identical from the outside. Buy a kit listed for a 2018+ car and it will not bolt in. This guide covers how to confirm what your car needs, how to tell a failing clutch from a hydraulic problem, and which kit type fits each kind of 2015-2017 GT build.

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Signs Your 2015-2017 GT Needs a Clutch

  • Slip under load - RPM climbs in 3rd or 4th at wide-open throttle but the car does not pull harder.
  • High engagement point - the clutch only grabs near the top of the pedal travel.
  • Chatter or shudder on takeoff, often a flywheel surface problem rather than the disc itself.
  • Soft, sinking or inconsistent pedal - this points to hydraulics, not friction material (see below).
  • A tune, power adder or sticky tires were added. Performance parts for these cars can easily push the factory clutch past what it was built to hold.

Step 1: Confirm You Have the 2011-2017 Hardware

The key fitment facts for a 2015-2017 GT manual:

  • Transmission: MT-82 six-speed with a 23-spline input shaft (1 x 23 metric). Beefcake Racing notes that Ford changed the MT-82 for 2018 and later, so a 2018+ car needs "a different clutch than the previous 11-17 model" (Beefcake Racing).
  • Crank flange: 8-bolt, with a 164-tooth ring gear on the aftermarket flywheels built for this car (McLeod 53218; Steeda / McLeod 6335825M).
  • Hydraulic throwout bearing (slave): the 2011-2017 GT and 2012-2013 Boss 302 use Ford BR3Z-7A508-B (Calimer Transmissions). The 2018-2023 GT uses a different part, JR3Z-7A508-A, built for the factory dual-disc clutch Ford used on the Gen 3 Coyote (Calimer Transmissions).

Bottom line: shop by "2011-2017 Mustang GT, 23-spline." That is why many of the best-fitting kits for your 2015-2017 car are labeled 11-17 rather than 15-17. For the full year-by-year transmission breakdown, see our Mustang GT transmission guide by year.

Step 2: Rule Out Hydraulics Before Buying a Clutch

A pedal that sinks, feels different hot versus cold, or will not fully release the clutch is usually a slave cylinder or line issue. On this car the slave is a concentric hydraulic throwout bearing inside the bellhousing, so it only comes out with the transmission. That is exactly why it belongs on the replace-while-you-are-in-there list below. Calimer notes the factory BR3Z-7A508-B works with both factory and aftermarket clutch kits (Calimer Transmissions).

Step 3: Match the Kit to Your Power Level

There is no single best clutch kit for every 2015-2017 GT. The best kit is the one sized to your power and driving, because more holding power usually costs some street manners. Here is how the proven options line up.

Stock to Moderately Modified (up to about 550 hp): Single Disc

For a daily-driven GT with bolt-ons, a tune or mild boost, a performance single-disc kit is the sweet spot. McLeod's Super Street Pro "Pro Pack" (53218) is listed specifically for the 2015-17 Mustang GT 5.0L as an 11 in x 1 x 23M, 164-tooth, 8-bolt assembly. McLeod rates it for up to 550 hp and describes it as built for "moderately modified street vehicles that see occasional track use." The disc is dual-faced, with organic material on one side for smooth, chatter-free engagement and ceramic on the other for bite under heat. It ships with a high-clamp pressure plate, an SFI-approved billet steel flywheel, pressure plate and flywheel bolts and an alignment tool (McLeod Racing).

McLeod 53218 Super Street Pro billet steel flywheel for 2015-2017 Mustang GT 5.0L, 164 tooth 8 bolt
The SFI-approved billet steel flywheel included in the McLeod Super Street Pro Pro Pack for the 2015-2017 Mustang GT (53218).

Another single-disc option that covers the 2015-2017 GT is the SPEC 11-17 Mustang 5.0L Stage 2+ clutch kit (SF503FH-9). If you are still deciding between friction materials, our Stage 1 vs Stage 2 vs Stage 3 clutch guide explains what each stage changes.

Supercharged, Turbo or Heavy Track Use (up to about 1,000 hp): Twin Disc

Once you add serious boost or run drag radials, a twin-disc kit spreads the load across two smaller discs. The McLeod RXT twin (6335825M) is a direct fit for the 2011-2017 GT and 2012-2013 Boss 302 MT-82. Steeda lists it at 1,000 hp with twin 9.687 in ceramic discs, a 1 x 23 metric spline, and an 8-bolt aluminum flywheel with a 164-tooth ring gear. It is described as having a light, comfortable pedal (Steeda). Beefcake Racing calls the RXT one of its more popular street/strip choices at the 1,000 hp rating. For builds up to about 800 hp, it points to McLeod's RST organic twin as a more street-oriented option (Beefcake Racing).

Shop it here: McLeod RXT twin disc clutch kit for the 2011-2017 Mustang GT (6335825M).

Quick Pick Table

Your 2015-2017 GT Kit type Example (sourced rating)
Bolt-ons, tune, daily driver Performance single disc, organic/ceramic McLeod Super Street Pro 53218, up to 550 hp
Mild boost, occasional track Single disc with more aggressive friction McLeod 53218 upper range, or SPEC Stage 2+
Up to about 800 hp, mostly street Organic twin disc McLeod RST twin (per Beefcake Racing)
Up to about 1,000 hp, street/strip Ceramic twin disc with aluminum flywheel McLeod RXT 6335825M, 1,000 hp

Replace While You Are In There

Cost and Effort

This is a transmission-out job. Steeda rates the McLeod RXT install as moderate difficulty with basic shop tools, at about 7 hours (Steeda). Budget a full day in a home garage with a lift or good jack stands and a transmission jack. Because the labor is the same whether you install a clutch alone or with a flywheel, slave and line, doing it all at once is the cheapest way to avoid pulling the MT-82 twice.

Break-in matters. McLeod specifies 1,200 to 1,500 clutch cycles of normal street driving before any wide-open-throttle use. It warns that 750 highway miles may not cycle the pedal enough to seat the disc (McLeod Racing).

Browse every fitment in our clutch kits collection.

Frequently Asked Questions

Will a 2018+ Mustang GT clutch fit my 2015-2017 GT?

No. Ford changed the MT-82 for 2018 and moved the GT to a factory dual-disc clutch with a different hydraulic throwout bearing (JR3Z-7A508-A instead of BR3Z-7A508-B). Buy kits listed for the 2011-2017 or 2015-2017 GT with a 23-spline input.

Do I need a twin-disc clutch for a supercharged 2015-2017 GT?

It depends on power. McLeod rates its single-disc Super Street Pro 53218 for up to 550 hp including mild forced induction. Above that, twin-disc kits such as the McLeod RXT, rated at 1,000 hp, are the common choice.

Should I replace the slave cylinder with the clutch?

Yes, in most cases. On the 2015-2017 GT the slave is a hydraulic throwout bearing inside the bellhousing, so replacing it later means pulling the transmission again.

Sources