INPUT SHAFT (4L80E) HEAVY DUTY SONNAX
# 38910

Heavy Duty Input Shaft

INPUT SHAFT (4L80E) HEAVY DUTY SONNAX

Input shaft failure is a common problem in performance and heavy duty GM 4L80-E and 4L85-E transmissions. The Sonnax heavy duty input shaft 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 recommended for applications up to 1,000HP.

  • Advanced torsional design with spline and cross-hole refinements for additional strength
  • Hobbed O.D. carrier spline eliminates deep undercut where other shafts fail
  • Extra spline material for additional strength

Note: Use only with '93-later overdrive carrier with four lube slots. See instructions for details.

Specifications:

  • Material: 300M

38910 Instruction Sheet

Type of Product: Hard Parts
Qty Needed:
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