Ford Ranger Rear Axles

Rear Axles Used:

All Ford Rangers came with a 7.5-Inch axle from 1983-1989. In 1990, Ford introduced a 4.0 liter V6 in the Ford Ranger. From 1990-2011, all 4.0L Ford Rangers came equipped with a 8.8-Inch axle, but the Ford 7.5-Inch axle was still available in other Ranger models.

Also, 1998-2011 4×4 supercab Rangers, regardless of powerplant, are frequently equipped with 8.8-Inch axles

The Information On This Page:

The order in which information is provided on this page is as follows:

  • Ford 7.5-Inch Axle Information
  • Ford 8.8-Inch Axle Information
  • Identifying Your Ford Ranger’s Rear Axle

This page only covers the stock Ford Ranger axle specifications. For information on axle swaps, as well as the measurements of the Ford Explorer 8.8-inch rear axle, can be found in the ‘How To’ section.

Ford Ranger 7.5-Inch Axle Width Differences:

People have asked about the widths of axle shafts to swap shafts from one axle to another.

The early 1983-1992 Ranger axles are 1-inch shorter than the 1993-up pieces (Both sides). This means that the entire 7.5-inch Ranger axle assembly from 1993-2011 is 2-inches wider than the 1983-1992 models.

The right side Ford Bronco II axle shaft is 1-5/8″ wider than the 1983-1992 Ranger shaft. All of this additional width is on the passenger side. The drivers side shaft is the same length in either axle assembly.

On ALL Ranger/Bronco II’s the drivers side axle shaft is longer than the passenger side.

Mustang Note: If you go to a salvage yard, you may find that the left side shafts have been removed from 1983-1992 Rangers and Bronco II’s. These axle shafts are the same length as the axle shafts in the “Fox” (1979-1993) Mustangs EXCEPT that Ranger/bronco II shafts are five-lug and Mustangs are four lug. Ranger/Bronco II shafts are frequently “pillaged” for use in converting a Mustang to five-lug wheels.

Ford Ranger 7.5-Inch Axle Specifications:

Ford 7.5-Inch Axle – Specifications – Ring Gear & Differential

 Ring Gear Diameter  7.5 (7-1/2) Inches
 Ring Gear Bolts  (10) 7/16″ x 20
 Differential Cover Bolts  10
 Pinion Stem  1.626 Inches
 Pinion Splines  28
 Pinion Bearing Preload (New)  14-19 in lb
 Pinion Bearing Preload (Used)  8-10 in lb
 Back Lash  .011″-.016″
 Ring Gear Bolt Torque  60 ft lb
 Bearing Cap Bolt Torque  60 ft lb
 Fluid Type Use hypoid gear lubricant SAE 75W80 or 80W90 (Add 2 oz. friction modifier to axles with limited slips)
 Fluid Capacity 5 pints (expect to use 2-3 quarts if changing the fluid. More if you have an aftermarket heavy duty cover.
Ford Ranger 7.5-Inch Axle Dimensions
Ranger 1983-1992 Ranger 1993-2009 Ranger 2010-2011 (Disc brakes)
Width WMS-WMS (Wheel Mounting Surface) 56-1/2 inches 58-1/2 inches unk
Axle tube diameter (1983-2009 models): 2.80 inches 2.80 inches 3.25 inches
Pinion length (axle centerline to u-joint centerline): 11-5/8 inches 11-5/8 inches 11-5/8 inches
Bottom Of Housing From Centerline 5-inches 5 inches 5 inches
Stock Spring Perch Width 38-1/2 inches 38-1/2 inches 38-1/2 inches
Axle Spline / Diameter 28 / 1.21 inches 28 / 1.21 inches 28 / 1.21 inches
Pinion Stem Diameter 1.626 inches 1.626 inches 1.626 inches
Ring Gear Diameter 7.50 inches 7.50 inches 7.50 inches

 

Ford Ranger 8.8-Inch Axle Usage:

Ford began using the 8.8-Inch axle in Rangers around 1986 on ‘incomplete vehicles’ aka ‘chassis cabs’, but the 8.8-Inch axles didn’t become common in the Ford Rangers until the introduction of the 4.0L V6 in mid-1990.

All 4.0L Ford Rangers are equipped with 8.8-Inch axles.

1998-2011 4×4 supercab Rangers regardless of powerplant are frequently equipped with 8.8-Inch axles. We’ve seen a 2001 Ford Ranger 3.0L with a 8.8-inch rear and 4.10 factory gears.

Ford 8.8-Inch Axle Shaft Splines:

Ford Ranger – The Ford Ranger 8.8-Inch axle used 28-spline shafts. The exception is the 2002 FX4 and 2003-2007 FX4 Level II models which had 31-spline shafts.

Ford Ranger 8.8-Inch Axle Facts:

The 1986-1988 8.8-Inch axles are distinctive as they are the only 8.8-Inch Ranger rears that have no provisions for a RABS sensor (Rear Anti-lock Brake).

The FX4 Ranger was introduced in 2002 and always came with 4.10 gears only. The 31-spline Torsen 8.8-inch axle came only with the 2002 FX4 and 2003-up FX4 Level II and more recently was a separate option. The 2003-up FX4 (non-Level II) is essentially the same as the 1998-2002 Off-Road except that a regular Ford limited-slip in a regular 8.8-inch was included.

The Ford Ranger 28-spline 8.8-Inch axle tube is 3.00 inches in diameter.

The Ford Ranger FX4 31-spline 8.8-Inch axle tube is 3.25 inches in diameter.

For more information on the Ford Ranger FX4, click HERE.

Ford 8.8-Inch Axle Bearings:

2000 Ford Ranger 8.8-Inch 28-spline axle bearing ID= 1.399″, OD= 2.2948″ (1563 series bearing)

Ford Ranger FX4 8.8-Inch 31-spline axle bearing ID= 1.1618″, OD= 2.5333″ (1559 series bearing)

Ford 8.8-Inch Axle Disc brakes:

The 2010-2011 Ford Ranger rear axles come with disc brakes.

Ford 8.8-Inch Axle Width Differences:

1990-1992 Ford Ranger 8.8-Inch Axle – 56-1/2 inches

1993-2009 Ford Ranger 8.8-inch Axle – 58-1/2 inches

Ford 8.8-Inch Axle Specifications:

Ford 8.8-Inch Axle – Specifications – Ring Gear & Differential

 Ring Gear Diameter  8.8 Inch
 Ring Gear Bolts  (10) 7/16″ x 20
 Differential Cover Bolts  10
 Pinion Stem  1.626 Inches
 Pinion Splines  28
 Pinion Bearing Preload (New)  14-19 in lb
 Pinion Bearing Preload (Used)  8-10 in lb
 Back Lash  .011″-.016″
 Ring Gear Bolt Torque  60 ft lb
 Bearing Cap Bolt Torque  60 ft lb
 Fluid Type Use hypoid gear lubricant SAE 75W80 or 80W90 (Add 2 oz. friction modifier to axles with limited slips)
 Fluid Capacity 5 pints (expect to use 2-3 quarts if changing the fluid. More if you have an aftermarket heavy duty cover.
Ford Ranger 8.8-Inch Axle Dimensions
1983-1992 1993-2011 2010-2011

With Disc Brakes

2002 Ranger FX4

2003-2007 FX4 Level II

Width WMS-WMS 56-1/2 inches 58-1/2 inches unk 59-1/2 inches
Axle tube diameter (1983-2009 models): 2.80 inches 2.80 inches 3.25 inches 3.25 inches
Pinion Offset Right Of Center 2 inches 2 inches 2 inches 2 inches
Pinion Offset Below Centerline 1.50 inches 1.50 inches 1.50 inches 1.5 inches
Pinion length (axle centerline to u-joint centerline): 11-5/8 inches 11-5/8 inches 11-5/8 inches 11-5/8 inches
Bottom Of Housing From Centerline 5-3/4 inches 5-3/4 inches 5-3/4 inches 5-3/4 inches
Stock Spring Perch Width 38-1/2 inches 38-1/2 inches 38-1/2 inches 38-1/2 inches
Axle Spline / Diameter 28 / 1.21 inches 28 / 1.21 inches 28 / 1.21 inches 31 / 1.32 inches
Pinion Stem Diameter 1.626 inches 1.626 inches 1.626 inches 1.626 inches
Ring Gear Diameter 8.80 inches 8.80 inches 8.80 inches 8.80 inches

Ford 7.5 Inch and 8.8 Inch Axle Visual Identification:

Both axles use (10) bolts to hold on the cover, but there is an obvious difference in their shape.

Ford 7.5-Inch rear axle above – Ford 8.8-Inch rear axle below.

Identification From Axle Tag:

The axle tag is bolted to the rear differential cover, and is held on with one of the cover bolts.

From the example above, you can see that the lower line shows the gear ratio, and axle diameter.

So from that example, we can see that the tag above is a 7.5 inch axle with 3.73 gears.

The tag above is a 8.8 inch axle, and also has 3.73 gears, but there is a ‘L’ between the ‘3’ and the ’73’. This means that it is a Limited Slip axle.

The tag above is from a 8.8 inch rear axle in a 2001 Ford Ranger 4×4 extended cab with 4.10 gears.

Federal Compliance Sticker:

Another way to identify the axle in a Ford Ranger is from the Federal Compliance Sticker in the door jamb.

If you look at the ‘AXLE’ section on the label above, you’ll see that this Ranger has a ‘F7’ axle code. Using the chart below, we know that this axle is a 7.5-Inch axle with a 4.10 limited slip.

Ranger
Code Description  Capacity Ratio
72 open 6-7/8″  2200  3.08
74 open 6-7/8″  2200   3.45
82 open 7.5″  2750  3.08
84  open 7.5″ 2750 3.45
85 open 7.5″  2750  3.55
86 open 7.5″ 2750 3.73
87  open 7.5″  2750 4.10
89 (1992-1998) open 7.5″ 4.10
89 (1999-2001) open 7.5″ 4.56
91 open 8.8″  2750   3.27
92  open 8.8″ 2750 3.08
95  open 8.8″  2750  3.55
96 open 8.8″  2750 3.73
97 open 8.8″ 2750 4.10
98 open 8.8″  2750 4.56
F4      L/S  7.5″  2750  3.45
F5 L/S  7.5″  2750  3.55
F6  L/S  7.5″  2750  3.73
F7 L/S  7.5″  2750 4.10
K6 L/S  8.8″  4.10
R5 L/S  8.8″  2750 3.55
R6  L/S  8.8″  2750 3.73
R7 L/S  8.8″  2750      4.10
R8 L/S  8.8″ 2750 4.56 
(Note 4.56 geared axles ’99-up are 31-spline)