May 20,
2021
The toughest GM 4L80-E input shaft ever made for 1,000+ horsepower vehicles is now available from Sonnax. It's an extreme duty shaft designed for extreme applications, when drivers want to go all out on the street or strip without worrying about transmission failure.
The input shaft in the 4L80-E and 4L85-E is a weak point in these otherwise very capable units where both OE and aftermarke...