Econoline E350 1 Ton V8-5.4L Prop SOHC VIN Z (1998)
To determine if the axle (2000 model year E-450 only) is a Dana 80 (Figure 1) or Dana T-Rib 70 (Figure 2), look at the pinion flange.
CAUTION
DO NOT REDUCE PINION BEARING PRELOAD IN AN ATTEMPT TO REDUCE AXLE WHINE. THIS HAS BEEN A COMMON
(UNAUTHORIZED) FIELD PRACTICE. REDUCING PINION BEARING PRELOAD MAY RESULT IN REDUCED AXLE DURABILITY.
NOTE
THE DAMPENED DRIVESHAFT IN THIS TSB IS DESIGNED TO REDUCE THE SOUND LEVEL OF AXLE WHINE CONCERNS. THE
DAMPENED DRIVE IS NOT INTENDED FOR OR TO BE USED TO ATTEMPT TO RESOLVE A DRIVELINE VIBRATION CONCERN.
1.
Verify the customer concern by road testing the vehicle. HINT: The most common speed ranges where customers have experienced E-450 axle
whine are 64-80 km/h (40-50 mph) and 96-112 km/h (60-70 mph).
2.
Determine the original wheelbase. The original wheelbase may be found in the lower left corner on the Vehicle Certification Label (Ford
Incomplete Vehicle Label). E-450s are built with only a 158 inch or 176 inch wheelbase with a two-piece driveshaft. A large number of E-450s are
