Seller notes

Sonnax Performance Input Shaft 300M 34670-01Fits 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 s...

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