McLeod Racing RST HD Twin w/ Aluminum Flywheel - 96-10 Mustang 4.6L - 1-1/16 x 10 Spline - 164T
The McLeod RST HD 6335803MD is a twin disc clutch and aluminum flywheel package for the 1996-2010 Mustang with the 4.6L modular V8 and the five-speed 1-1/16 x 10 spline gearbox. It suits the GT owner who has added a blower, turbo or nitrous and found the single disc slipping, but who still drives the car on the street and does not want the full ceramic bite of an RXT.
McLeod positions the RST HD between its RST and RXT twin disc systems. The two discs are a hybrid: one runs full-face organic friction for smooth engagement, the other uses segmented ceramic for extra bite when the power comes in. McLeod rates the RST HD at up to 950 horsepower and describes a lighter-than-stock pedal, which is the advantage of a twin disc: clamp load is shared across two friction surfaces, so the pressure plate does not need a stiff diaphragm to hold big torque.
This MD version is the complete package with a dedicated aluminum flywheel for the 8-bolt 4.6L crank and a 164-tooth ring gear. The aluminum wheel cuts rotating weight compared with the steel factory part, so revs rise and fall faster between shifts. The packed kit weighs about 42 lb.
Do a fourth-gear slip test from low rpm at full throttle; if the tach climbs while road speed lags, the clutch is not holding. Rule out the hydraulics, cable or quadrant on early cars, and check for oil from the rear main or input shaft seal, since oil will ruin new discs. Our manual vs automatic repair cost guide covers what the job involves, and the slipping diagnosis guide walks through the road test.
McLeod lists 6335803MD for the 1996-2010 Ford Mustang 4.6L with the 8-bolt crank, 1-1/16 x 10 spline input and 164-tooth ring gear. In those years the GT ran the T-45 five-speed early and the TR-3650 five-speed later, and both use this spline. It is not for V6 cars, the 2003-2004 Cobra with the T-56, the GT500, or any car swapped to a 26 spline gearbox. Count the crank flange bolts before ordering, and if you are unsure, send us your year and VIN. The full lineup is in our hard parts section.
If you want full ceramic grip for more power, compare the RXT 6335803M for the same cars.
| Brand | McLeod Racing |
| Part number | 6335803MD |
| Fits | McLeod Racing RST HD Twin w/ Aluminum Flywheel - 96-10 Mustang 4.6L - 1-1/16 x 10 Spline - 164T |
| Vehicle fitment | Ford Mustang (1996-2010) |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
McLeod places the RST HD between the RST and RXT. It pairs one organic disc with one segmented ceramic disc for street manners, and is rated to 950 horsepower. The RXT uses ceramic facings for more grip and harsher engagement.
Yes. 6335803MD comes with a dedicated aluminum flywheel for the 8-bolt 4.6L crank with a 164-tooth ring gear.
No. The 2003-2004 Cobra used the six-speed T-56, not the 1-1/16 x 10 spline five-speed this kit is made for.
McLeod describes a lighter-than-stock pedal feel, because the twin disc design shares the clamp load across two discs.
Replace the pilot bearing or bushing and the release bearing, check for rear main and input seal leaks, and bleed the hydraulics on cars that use them. On 2005-2010 cars the McLeod 14-301 slip-on bearing fits the TR-3650.
