What is a rear coupler?
All Syncro Vanagons were originally fitted with a device called a viscous coupler (VC) which allows them to be in full-time “kinda” 4WD. The purpose of the viscous coupler is to allow slippage between the front and rear axles when the vehicle is driven in high traction situations.
When to use viscous coupling on Jeep all wheel drive?
A viscous coupling locking center differential. In 1993-1995 the viscous coupling was used to lock the differential when in low range (NP249 transfer case). In 1996-1998 the differential is mechanically locked when in low range (NV249 transfer case).
What kind of coupler does a jeep rm249 use?
Jeep NP249 Factory Re-manufactured Viscous Coupler Coupling This is a factory re-manufactured viscous coupler for the 1993-1998 Jeep with the NP249J transfer case. We only use OE cores and American made parts and chemicals, nothing offshore.
How does Jeep all wheel drive system work?
One part of the pump, the rotor, is driven by the front driveshaft while the other part, it’s case, is attached to the rear driveshaft. The system reacts faster than the viscous coupling unit of the previous Jeep AWD system.
What’s the reaction time of a jeep AWD?
The system reacts faster than the viscous coupling unit of the previous Jeep AWD system. The reaction time is about 40 milliseconds. The transfer box can be also locked in low-range mode to provide equal power to the front and rear axles. Progressive Vari-Lok gerodisc differentials front and rear, using the same geroter pump system.
A viscous coupling locking center differential. In 1993-1995 the viscous coupling was used to lock the differential when in low range (NP249 transfer case). In 1996-1998 the differential is mechanically locked when in low range (NV249 transfer case).
Jeep NP249 Factory Re-manufactured Viscous Coupler Coupling This is a factory re-manufactured viscous coupler for the 1993-1998 Jeep with the NP249J transfer case. We only use OE cores and American made parts and chemicals, nothing offshore.
What is the use of viscous coupling unit in AWD cars?
What is the use of Viscous Coupling Unit in AWD Cars? The Viscous Coupling (VC) is the transmission component intended for transmission and leveling of torque from the center drive shaft to the front differential, and on to the front wheels.
What are the disadvantages of viscous coupling?
When driving wheels slip, viscous coupling locks and torque is transferred to the other axle. This is an automatic all wheel drive system. The disadvantage of a viscous coupling is that it engages too slowly and allows for excessive wheelspin before transferring torque to another wheels.