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

by Sonnax
Original price $399.88 - Original price $399.88
Original price
$399.88 - $399.88
Current price $399.88
in stock, ready to be shipped

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Non-Domestic Product: No

Custom Bundle: No

Fitment Type: Direct Replacement

Items Included: Heavy Duty 300M Input Shaft

Manufacturer Part Number: 34670-01

Vintage Part: No

Modified Item: No

Transmission Type: Automatic

Brand: Sonnax

Type: Input Shaft

Manufacturer Warranty: Unspecified Length

Surface Finish: New

Universal Fitment: Yes

Performance 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 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
  • Material: 300M

Installation recommendation: Experienced technician
Transmission removal necessary: YES

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