Specing 4S/4M on 6X4 Tractors or Trucks with ATC, is a mistake, even though all OEM's/Engineering/Suppliers allow it. 4S/4M meets RDS (Reduced Stopping Distance) which is everyone's focus.

Gary Hey
Jun 16
1 min read

ATC (Automatic Traction Control) is the culprit, coupled with driver education. 4S/4M exposes the fwd drive axle to a spinout/lack of lube, non-warrantable failure. OEM's should make 6S/6M standard with ATC. Everyone blames the axle manufacture, which is not their issue. It's the nature of open rear axle design and drivers who don't understand how these work.

How well do you know Vocational Chassis?

Reach out to Zfactor for truck knowledge. No one has this level of understanding.

Email questions (stay anonymous). You don’t know what you don’t know. The best thing is to attend our 2 ½ day class or at least access eLearning and use GURU. Our promise is to leave the industry better than when we arrived.

56 specific Vocational chassis

Cold call specing on your phone or tablet.

www.zfactorconnect.com.

It generates a 15-page report by answering 38 questions tied to the application. Email a copy before leaving the customer. Customer collaboration significantly cuts down on time lost due to misunderstanding and improves conversion.