QU40090 CAD Housing Gasket for Ram & Jeep Vacuum Axle Disconnect

QU40090 CAD Housing to Axle Gasket Genuine original equipment, tri-layer gasket features reinforced cork-steel-cork sandwich construction for crush proof and leak proof performance. Fits all Dodge, Jeep, and Plymouth 4x4's using solid beam, Dana-Spicer axles equipped with a vacuum controlled Central Axle Disconnect (CAD) system mounted on the axle tube. Country of origin unknown, we believe it is USA.

Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!

Dan the Gear Man® Tech Notes:
Wear
Differential Output Shaft
CAD Engagement Issues
CAD Kits
Matching Parts
Applications

Tech Note 1: Wear
Using the correct thickness gasket is essential for CAD axles as there may be insufficient clearance between the fork opening and shift collar without it.

Tech Note 2: Differential Output Shaft
The differential output shaft (intermediate shaft) from the axle on most 1985-1993 Dodge and on most Jeeps with vacuum controlled Central Axle Disconnect (CAD) is retained by a snap ring on the inboard end. If you need to remove the diff output shaft, you will need to pull the diff cover and remove the snap ring.

Tech Note 3: CAD Engagement Issues
If you are having Central Axle Disconnect engagement problems, there are usually multiple causes. Some of the most common issues that need to be checked are (and part numbers for most Dodge applications):
Vacuum Shift Motor Leak: Unit will not hold steady vacuum. Replacement is required, see QU40224.
Bent Vacuum Motor Shift Rod: Replacement is required, see QU40224.
Worn Axle Shaft Bushings: Replacement is required, see QK4626.
Differential Output Shaft Splines Worn: Replacement is required, see QU10943.
Stud on End of Differential Output Shaft Worn Undersize: Replacement is required, see QU10943.
Tips of Shift Collar Splines Worn: Replacement is required, see QU40274.
Shift Fork Bent or Pads Missing: Replacement is required, see QU40156 Pads and QA4760 Fork Kit.
Vacuum Line Leak (VERY common on these older trucks): See QU11061 and QU11062
Transfer Case Vacuum Switch Bad: Replacement is required, see QU10569

Tech Note 4: CAD Kits
Given the era of trucks this gasket fits, it is recommended you replace the inner axle seals which can become hard and brittle with age if you remove the axle shafts. Some available Kits with Installation Tools and Seals include:
QK4620 for 1988 to 1999 Dodge Ram with CAD
QK4621 for 2000 to 2002 Dodge Ram with CAD
QK4601 for most 1984-1987.5 Jeeps with CAD
QK4624 for most 1987-1996 Jeeps with CAD

Tech Note 5: Matching Parts
Matching Parts for QU40090 CAD Gasket:
QA4628 CAD Shift Fork Kit
QU40317 CAD Shift Housing
QU40224 CAD Vacuum Actuator Kit
QK4627 CAD Small Parts Kit
QU11062 Frame to Axle Vacuum Line Kit 1994-2002 Dodge Ram all with CAD
QU40246 CAD Axle Shaft Shift Collar 1994-1999 Ram 2500, Ram 3500, 1994-2001 Ram 1500
QU40274 CAD Axle Shaft Shift Collar 2000-2002 Ram 2500, Ram 3500
QU40333 Differential Output Shaft 1994-2001 Dana 44 with CAD, 30 splines inboard x 15 splines outboard
QU40300 Differential Output Shaft 1994-1999 Dana 60 with CAD, 30 splines inboard x 15 splines outboard
QU10943 Differential Output Shaft 2000-2002.5 Dana 60 with CAD, 32 splines inboard x 18 splines outboard
QK4620 Inner Axle Shaft Seal Kit with Installation Tools for 1988 to 1999 Dodge Ram with CAD
QK4621 Inner Axle Shaft Seal Kit with Installation Tools for 2000 to 2002 Dodge Ram with CAD
QK4601 Inner Axle Shaft Seal Kit with Installation Tools for most 1984-1987.5 Jeeps with CAD
QK4624 Inner Axle Shaft Seal Kit with Installation Tools for most 1987-1996 Jeeps with CAD
QK4732 Outer Axle Shaft Nut and Washer Kit for Dodge Ram
QU40236 Dana Original Equipment Model 30 Differential Cover Pan Gasket
QU42027 Dana Reusable Model 30 Differential Cover Pan Gasket
QU40214 Dana Original Equipment Model 44 Differential Cover Pan Gasket
QU42028 Dana Reusable Model 44 Differential Cover Pan Gasket
QU40367 Dana Original Equipment Model 60/70 Differential Cover Pan Gasket
QU42029 Dana Reusable Model 60 Differential Cover Pan Gasket

Tech Note 6: Applications

DODGE:
Ramcharger, W150: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
W250 with gasoline engine: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
Ram 1500: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
Ram 2500, Ram 3500: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2002-1/2

JEEP:
XJ Cherokee and YJ Wrangler: 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996

PLYMOUTH:
Trailduster: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993