ACT Twin Disc HD Street Clutch Kit Rebuild Kit (For T1R / T2R / T3R / D03 / G01 / G02 / G05 / G06)
If you already run an ACT Twin Disc clutch in a Dodge Challenger, a C5 Corvette, a Cadillac CTS-V or a fourth-generation Camaro and the pedal has started to slip under boost or full throttle, you do not have to buy a whole new twin disc assembly. ACT part number T1R-RK01 is the factory rebuild kit for the D03, G01, G02, G05 and G06 versions of its T1R (HD race), T2R (XT race) and T3R (MaXX XT race) twin disc kits. You keep your ACT flywheel and send the worn wear parts back to the shelf.
An ACT Twin Disc kit stacks two 10.5 inch ceramic discs on a 1-1/8 inch input shaft, with a floater plate between them and a pressure plate that clamps both against a machined flywheel. ACT rates the T1R-D03 and T1R-G02 race kits at 1,141 ft-lb. Because the clamp load is shared across four friction faces, each face wears slowly, but once the discs, floater and pressure plate surfaces are worn thin, the diaphragm loses clamp and the clutch slips. ACT's design uses what it calls a Positive Lift Floater System, which lifts the floater off the lower disc on release instead of riding on posts, and the assembly adjusts for disc wear to keep disengagement equal on both discs. The rebuild kit is ACT's replacement-parts package that returns that assembly to its original working height, so the expensive CNC flywheel that came with your kit stays in the car.
Rule out hydraulics first. A tired slave cylinder or air in the line will leave a twin disc partially engaged and feel exactly like wear. Bleed the system and check that the release travel matches the specification in ACT's install sheet. If it still slips, pull the transmission and measure: compare the stack height and disc thickness against ACT's service data, and look at the floater for heat checking. A clutch that slips on the street but holds on a dyno is usually a hydraulic problem, not a worn disc. Our manual vs automatic repair cost breakdown shows where clutch labor money goes, and the rebuild vs replace comparison helps if the gearbox behind the clutch also needs work.
T1R-RK01 is listed by ACT for twin disc kits ending in D03, G01, G02, G05 and G06 across the T1R, T2R and T3R lines. On ACT's own fitment pages the D03 kits cover 2008-up Challenger SRT8 and R/T applications, and the G02 kits cover the 2004-2007 Cadillac CTS-V and 2005-2006 Chevrolet SSR. In ACT's catalog G01 is the 2003 Corvette kit and G05 is the 1998 Camaro kit. This kit does not fit the Mod-Twin family (part numbers with M, S or B codes) or the street-disc T1S/T2S/T3S kits; ACT lists T1S-RK02 for the G01, G02, G05 and G06 street versions. The fastest way to be sure is to read the part number off your original kit box or invoice and send it to us with your year and VIN before ordering. If you would rather start fresh, the complete ACT T3R-G01 MaXX XT twin disc kit includes the flywheel, and street versions such as the Challenger T1S-D03 twin disc kit are in our rebuild kits category.
| Brand | ACT |
| Part number | T1R-RK01 |
| Fits | ACT Twin Disc HD Street Clutch Kit Rebuild Kit (For T1R / T2R / T3R / D03 / G01 / G02 / G05 / G06) |
| Type | Clutch Rebuild Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
It is ACT's rebuild kit for the twin disc race kits ending in D03, G01, G02, G05 and G06 in the T1R, T2R and T3R series, for example T1R-D03 or T3R-G01. Street-disc kits (T1S, T2S, T3S) and ACT Mod-Twin kits use different rebuild kits.
Normally no. The twin disc kit came with a CNC-machined ACT flywheel and this kit is meant to reuse it. Replace or resurface the flywheel only if it is cracked, warped or out of ACT's service limits.
Bleed the clutch and check slave travel first. If the clutch still slips under load with correct release travel, measure the discs and stack height against ACT's service data. Drag and high engagement can come from either cause, so check hydraulics before tearing it down.
No. Mod-Twin kits use the RK10 through RK18 series, and the T1S street twin disc kits for the G01, G02, G05 and G06 applications use T1S-RK02. Match the part number on your original kit before ordering.
Replace the pilot bearing and release bearing, inspect the slave cylinder and clutch line, and check the rear main seal for leaks while the transmission is out. Oil on a ceramic disc will cause chatter on a fresh rebuild.
