RTS Transmission, Planetary 4 Pinion, Fully Rollerised, Torrinton Bearings, C4 C5 C9 C10, Automatic, Each

RTS 4-Pinion Front Planetary                                                                                                                                                                                                   

The standard oem front planetary is another weak link that needs some attention when trying to make the C4 survive in a performace environment. The original design planetary has only 3 gears and does not have bearings, which generate a lot of heat and is prone to failure. Our new 4 pinion planetary has 4 gears instead of the oem 3 for extra strength while also adding Torington bearings on each of the 4 pinions and the thrust shim to reduce friction. This will therefore reduce both heat and friction, increasing the efficiency of the system (less HP loss) while also reducing transmission oil temperatures (which is the transmissions worst enemy)!

All these features are incorporated into a 4140 Chromoly CNC-machined housing with 8620 heat treated helical gears. Many people believe you need a 6 pinion version which is not entirely correct. 6 pinion planetaries are heavier, take more power to drive and the housing strength is compromised to accomodate the 6 gears. RTS has looked at all the pros and cons and settled on the 4 Pinion as being the best choice your race winning transmission.

Note: Due to the thickness of the IKO bearing included in this planteary, the anulus will need to be machined down approximately 1.3-1.4mm for correct fitment. The bearing OD is 78mm.

Note: Most transmission builders are well versed on the importance of oil feed for bearing survival, we can only do so much when making quality transmission components that rely on builders doing their part in good assembly practice.

RTS-4PPC4-TB Torrington bearing is also available as a service part sold individually.