Sonnax Performance 4L80E 4L85E Input Shaft 300M Heavy Duty handles up to 1000HP

Non-Domestic Product: NoCustom Bundle: NoFitment Type: Direct ReplacementItems Included: Heavy Duty 300M Input ShaftManufacturer Part Number: 34670-01Vintage Part: NoModified Item: NoTransmission Type: AutomaticBrand: SonnaxType: Input ShaftManufacturer Warranty: Unspecified LengthSurface Finish: NewUniversal Fitment: YesPerformance Part: Yes Sonnax Performance Input Shaft 300M 34670-01 Fits 1991-On 4L80E & 4L85E Models Input shaft failure is a common problem in performance and heavy duty GM 4L80-E and 4L85-E transmissions. Sonnax heavy duty input shaft 34670-01 is manufactured from high strength 300M with proprietary heat treatment and post-heat treat processing for exceptional performance, durability and value. O.D. carrier spline where shafts typically fail is greatly improved by eliminating OE undercut plus the addition of extra spline material at the major diameter that fills the gap at the root of the internal O.D. carrier spline. This shaft is recomm