McLeod RXT Twin Disc Clutch Kit w/Steel Flywheel - Mod Motor Fords w/8 Bolt Crank 1-1/8in x 26 Input
If your 4.6L or 5.0L Mustang now makes power that cooks single-disc clutches, and the gearbox behind it has a 1-1/8 inch, 26 spline input, the McLeod 6435807M is built for that exact combination. It is the RXT street twin with ceramic-lined discs, sold as a complete Power Pack on McLeod's billet steel flywheel drilled for the modular V8's 8-bolt crank, with a 164 tooth ring gear and zero balance. Owners usually land here after a supercharger, turbo or nitrous build starts slipping the clutch at the top of third and fourth gear.
A twin disc puts two friction discs and a floater plate under one pressure plate, so clamp load works on four friction faces instead of two. McLeod uses that extra surface on the RXT to hold big power while keeping the pedal lighter than stock. Its catalog copy rates the RXT street twin for roughly 1,000 to 1,100 horsepower and aims it at cars that are driven to the strip, run several quarter-mile passes and then driven home. The ceramic facings bite harder and take heat better than organic material, while McLeod still describes engagement as smooth for a street car. The pressure plate is strap driven.
The flywheel in this kit is McLeod's dedicated steel unit for its RST, RXT and RXT 1200 twins: A36 steel with a heat-treated ring gear. Steel carries more inertia than aluminum, which helps a heavy street Mustang leave a light without slipping the clutch. The boxed kit weighs about 45.7 lb.
Run a third or fourth gear roll-on from low rpm at wide-open throttle. If the tach climbs without the car pulling harder, the clutch is slipping. Before you spend this kind of money, rule out a hydraulic fault that keeps the bearing pressed against the fingers, and look for oil from the rear main or the gearbox front seal, which will contaminate any new disc. Our slipping diagnosis guide walks through the checks, and the clutch slipping causes page covers the manual-specific ones.
The listing and McLeod's data cover 1996-2017 Ford Mustang 4.6L and 5.0L engines with the 8-bolt crank and a 1-1/8 x 26 input. Read that spline carefully. The factory boxes in these cars used other inputs: the T-45 and TR-3650 run a 1-1/16 x 10 spline and the 2011-up MT82 uses 1 x 23. That makes this kit the right choice for a car that has been swapped to a gearbox with a 1-1/8 x 26 shaft. If your 2011-2017 GT still has its MT82, the RXT steel Power Pack for the 11-17 Mustang 5.0 is the correct part. Some modular cranks are 6-bolt, so count the bolts on yours, and send us the year, last 8 of the VIN and the transmission model if you are unsure. Prefer a lighter rotating assembly for a track car? Look at the aluminum-flywheel RXT for modular Fords. More clutch parts are in our rebuild kits department.
| Brand | McLeod Racing |
| Part number | 6435807M |
| Fits | McLeod RXT Twin Disc Clutch Kit w/Steel Flywheel - Mod Motor Fords w/8 Bolt Crank 1-1/8in x 26 Input |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Not with the factory TR-3650. That gearbox has a 1-1/16 x 10 input and this kit is splined 1-1/8 x 26. It suits a car that has been swapped to a gearbox with a 26 spline input.
Both use a steel flywheel for the 8-bolt modular crank and a 1-1/8 x 26 input. The 6435807M is the RXT with ceramic facings, rated by McLeod at roughly 1,000 hp and up; the 6435807MD is the RST HD with organic and ceramic facings, rated to about 950 hp with a softer bite.
Yes. This is McLeod's Power Pack: the twin disc assembly comes with a dedicated billet steel flywheel, 164 tooth ring gear, zero balance, for the 8-bolt crank.
McLeod says to break it in with normal street driving, about 1,200 clutch cycles while shifting up and down through the gears, and never on a chassis dyno.
Replace or inspect the pilot bearing, check the release bearing and slave for leaks, and set the release bearing height for the twin disc, especially on a swapped gearbox.
