Drive-Line NVH

Situation

Uncoated drive-line splines used on light duty pickup trucks and SUVs generated a clunking noise when the truck would start or stop.  Applying a conventional fluidized bed nylon eliminated the noise by protecting the spline from corrosion while lubricating the surface.  However, close tolerances required broaching each part to remove excess nylon, a costly and wasteful process.

Approach

Wright Coating developed the WRYLON® process to apply nylon 11 powder to the splines.  The process enabled precision application of the coating to a few mils eliminating the need for expensive and wasteful broaching.

 

Result

Coating driveline splines with nylon 11 using Wright Coating’s WRYLON® process extended life of the splines as much as ten times and eliminated the annoying “clunk” sound.   Wright Coating has coated several million splines using the proprietary WRYLON® process. 

 

After 125,000 miles can you tell the difference?

Both splines were coated with nylon 11 using Wright Coating Technoloiges' WRYLON® process.  The coated spline on the right was removed from a test vehicle driven 125,000 miles on a major OEM manufacturer’s test track.  No evidence of wear or degradation was observed.

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