BorgWarner BW 4406 & BW 4406

BW 4406, BW 4407 Transfer Case Specs & Ratios

The BW 4406 transfer case was introduced in 1996 for a variety of Ford vehicles, including Ford F-150 and F-250 models with a GVWR less than 7,200 lbs. The transfer case was offered as either a part time or full time torque-on-demand unit, making it suitable for Ford's AWD Expedition model. The BW 4407 is the heavy duty alternative to the 4406, used in pickups with a GVWR greater than 8,500 lbs. Both transfer cases feature similar low range ratios, the BW 4407's being slightly shorter. The transfer case model can easily be identified, like all BorgWarner cases, by the metal ID tag bolted to the transfer case.

The stronger BW 4407 was available with a PTO (power take off) option, allowing it to be used with hydraulic accessories. It was designed specifically to be used with the Ford E4OD automatic and ZF manual transmissions. Due to the chain drives, both the BW 4406 and BW 4407 require ATF for lubrication. Behind automatic transmissions, the transfer case and transmission lubrication systems are isolated from one another, meaning that the transfer case and transmission fluids must be changed independently.

 

BorgWarner BW 4406 Specs

Manufacturer:

BorgWarner

Applications:

Select 1996 - 2003 Ford F150/F250 pickups & Ford Expedition. < 7,200 lbs GVWR

Case:

Cast aluminum

Drive Type:

Chain drive, manual & electronic shift versions. Available as part time or fill time, torque-on-demand

Gear Ratios:

High Range

1.00 : 1 (direct drive)

Low Range

2.64 : 1

Fluid Type/Spec:

Automatic transmission fluid (ATF), 4 pint (1.9 liter) capacity

Weight:

98 lbs dry

Identification:

Metal ID tag bolted to case - see figure below

 

BorgWarner BW 4407 Specs

Manufacturer:

BorgWarner

Applications:

1996 - 1998 Ford F250/F350 pickups, > 8,500 lbs GVWR

Case:

Magnesium

Drive Type:

Chain drive, part time, PTO available for F350, manual & electronic shift versions

Gear Ratios:

High Range

1.00 : 1 (direct drive)

Low Range

2.69 : 1

Fluid Type/Spec:

Automatic transmission fluid (ATF), 2 liter capacity

Identification:

Metal ID tag bolted to case - see figure below

 

BorgWarner (BW) transfer case identification

BorgWarner transfer case identification tag location & breakdown