4L60, 4L60-E, 4L65-E, 4L70-E

Heavy Duty Reaction Shaft Kit
Part No. 74602-01K

Universal kit, fits all years and all input carrier styles.

OE Part No. 19369220, 19356510, 24236094, 24241255, 24222756

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GM 4L60E series reaction shafts used in high-torque applications — and especially in heavy vehicles — suffer from two common issues that require replacement: The splines that engage the rear planet can twist and the splines that engage the ring gear fret/wear. OE and other aftermarket versions are made from lower strength, plain carbon steel. Sonnax heavy duty reaction shaft 74602-01K is made from high-strength chromoly steel alloy to eliminate spline twist and spline wear.

The shaft kit includes a shim and two bearings. One bearing is for the shaft-to-reaction shell, the other bearing plus shim combination is for shaft-to-front carrier and makes it a universal fit for all input carrier styles. This includes all four- and five-pinion carriers found in early 700-R4, 4L60-E and 4L65-E units including the Sonnax 2.84 ratio six pinion input carrier kit as well as late-style four- and five-pinion 4L60-E and 4L70-E carriers with lip-style bearings.

  • Prevents spline twist and wear
  • High-strength alloy outperforms all other OE and aftermarket shaft material
  • Universal fit
  • Reaction Shaft With Bushings
  • Bearing Reaction Shaft-to-Shell
  • Bearing Reaction Shaft-to-Front Carrier
  • Shim
  • 4L60, 4L60-E, 4L65-E, 4L70-E Heavy Duty Reaction Shaft Kit 74602-01K
  • 4L60, 4L60-E, 4L65-E, 4L70-E Heavy Duty Reaction Shaft Kit 74602-01K details