the 4x4 on my 2002 ford escape wont engage and work. turn the 4x4 on and it lights up but you hear and feel nothing engage or do anything

Asked by Jan 09, 2013 at 12:18 AM about the 2002 Ford Escape XLT 4WD

Question type: Maintenance & Repair

1 Answer

This on-demand all-wheel-drive setup only sends power to the rear axle when the front wheels slip. In the “4x4 Auto” mode, 100 percent of the torque is sent to the front wheels until a wheel slips. When that happens, a rotary blade coupling (RBC) generates enough pressure to activate a multiplate clutch, like that found in an automatic transmission, which sends torque (as much as 100 percent of it) to the rear. At the heart of the RBC is a “fan” with three blades in a chamber filled with a silicone fluid like that used in viscous couplings. The fan is shaped kind of like the warning symbol for radiation. When the front wheels slip, this fan spins through the fluid, heating and expanding it, which generates the pressure to activate the clutch. Then the clutch – not the viscous fluid – bears the burden of transmitting the torque. When set to “4x4 On”, an electromagnet energizes a small clutch pack, locking a ball ramp to the input shaft. Now when the wheels spin, they turn the ball ramp, which overrides the RBC and pressurizes the same multiplate clutch pack. In the “4x4 On” mode, the rear axle is engaged quicker and more securely. The front and rear axles are, however, never locked together except during front wheel slippage. That way there is never any crabbing or binding in tight turns, and there is no need for a center differential.

12 of 12 people found this helpful.

Your Answer

Ford Escape Experts

  • #1
    Tom Demyan
    Reputation
    5,860
  • #2
    Bratts
    Reputation
    2,990
  • #3
    kbro
    Reputation
    1,710
View All

Related Models For Sale

Used Ford Explorer
1,180 Great Deals out of 76,948 listings starting at $2,100
Used Honda CR-V
800 Great Deals out of 66,717 listings starting at $999
Used Toyota RAV4
826 Great Deals out of 56,013 listings starting at $1,600
Used Ford F-150
3,192 Great Deals out of 239,282 listings starting at $1,300
Used Jeep Grand Cherokee
1,053 Great Deals out of 84,354 listings starting at $1,200
Used Ford Focus
814 Great Deals out of 61,762 listings starting at $1,150
Used Hyundai Santa Fe
305 Great Deals out of 18,925 listings starting at $1,995
Used Jeep Cherokee
437 Great Deals out of 69,345 listings starting at $2,495
Used Kia Sorento
564 Great Deals out of 34,762 listings starting at $2,699
Used Jeep Liberty
216 Great Deals out of 7,190 listings starting at $995

Used Cars For Sale

2018 Ford Escape For Sale
51,232 listings starting at $14,595
2017 Ford Escape For Sale
147 Great Deals out of 22,741 listings starting at $13,995
2016 Ford Escape For Sale
155 Great Deals out of 5,127 listings starting at $9,832
2015 Ford Escape For Sale
214 Great Deals out of 6,393 listings starting at $8,691
2014 Ford Escape For Sale
300 Great Deals out of 9,023 listings starting at $4,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.