QU10942 Main Vacuum Supply Line Harness 1994-1997 Ram with CAD

QU10942 Main Vacuum Supply Line Harness for 1994-1997 Dodge Ram with CAD is a genuine original equipment vacuum harness that runs from the engine back to the transfer case vacuum switch and then down to the transmission cross member on 1994-1997 Dodge Ram 4x4s with vacuum controlled Central Axle Disconnect (CAD) systems. QU10942 fits all 1994-1997 Ram 1500 1/2 ton 4x4s with Dana 44 front axles. QU10942 also fits all 1994-1997 Ram 2500, Ram 3500 4x4 with either Dana 44 or Dana 60 front axles. Made in Mexico.

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:
Troubleshooting
Engagement
Problem
1998-2002 Harness
Matching Parts
Applications

Tech Note 1: Troubleshooting
Troubleshooting axle disconnect problems can be tough if you do not have patience, a vacuum pump and vacuum gauge. Quite often, by the time you decide you can not live with erratic shift performance, the original issue has caused one or more further difficulties. Shifting problems can be vacuum, mechanical, or both. To help you understand the vacuum system, TSB4903 color coded vacuum schematic will soon be available. We are also working on Tech Service Bulletin 4904 Diagnosing Vacuum Controlled Disconnect Problems on Dodge and Jeep Vehicles to help you troubleshoot the many possible sources of shifting problems. TSB4904 will be released as soon as I can get it done, but in the mean time, I am semi-retired, so unfortunately, I am no longer available to help you troubleshoot your CAD system over the phone or via e-mail.

Tech Note 2: Engagement
If you are having Central Axle Disconnect engagement problems, there is 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.
Bent Vacuum Motor Shift Rod: Replacement is required, see QK4904
Worn Axle Shaft Bushings: Replacement is required, see QK4625, QK4646, QK4626.
Differential Output Shaft Splines Worn: Replacement is required, see QU40300, QU10943.
Stud on End of Differential Output Shaft Worn Undersize: Replacement is required, see QU40300, QU10943.
Tips of Shift Collar Splines Worn: Replacement is required, see QU40246, QU40274.
Shift Fork Bent or Pads Missing: Replacement is required, see QU40156, QA4628, QA4760.
Vacuum Line Leak (VERY common on these older trucks): See QU11061, QU10942, and QU11062
Transfer Case Vacuum Switch Bad: Replacement is required, see QU10569

Tech Note 3: Problem
The most common problem I see with original QU10942 vacuum harnesses is swelling of the rubber 4 port connector that fits the transfer case switch. Just about every truck with an engine oil leak will have this problem if the oil is blown onto the connector for any length of time.

Tech Note 4: 1998-2002 Harness
QU10942 fits 19994-1997 Dodge Ram 4x4 trucks with CAD. If you need a harness for a 1998-2002 Ram, see QU11061. The matching cross member to axle Harness for all years is QU11062.

Tech Note 5: Matching Parts
Matching Parts for QU10942 Vacuum Harness:
QU10569 Transfer Case mounted Control Switch for Front Axle CAD
QA4628 CAD Shift Fork Kit
QU40317 CAD Shift Housing
QK4627 CAD Small Parts Kit
QK4904 Axle Mounted Vacuum Shift Motor
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
QK4627 CAD Small Parts Kit
QU40090 CAD Housing to Axle Housing Gasket
Dodge & Ram Shop Manuals

Applications:
DODGE:
Ram 1500, Ram 2500 and Ram 3500: 1994, 1995, 1996, 1997