I have a 2003 ford explorer. When gently accelorating between 40 - 80 KPH, frequently the truck feels as if the rear end is slipping. The RPM's do not rev, but the truck starts jerking / slipping for a sec. This will continue until I either take my foot off the gas, or accelerate harder. I noticed that this does not appear to occur if the truck is in 4 wheel drive. Any ideas?
Thanks, however this occurs at any speed between 40 - 80 KHH, not just at where the it should be shifting?Thanks, however this occurs at any speed between 40 - 80 KHH, not just at where the it should be shifting?
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Differentials are direct-drive devices -- they cannot slip.
This really sounds like erratic shifting taking place right at the shift point. Gentle acceleration is the trickiest shift for an automatic. When accelerating harder, the transmission shifts more abruptly, which is a much easier shift to complete.
"this occurs at any speed between 40 - 80 KPH, not just at where the it should be shifting
That is odd. It is not the differential, as I said. But it does appear it is not a shifting issue per se either.
20 to 40, that's pretty light duty, usually pretty low RPM. Of course, at a low load like that, the transmission letting go briefly might not allow the engine to gain enough speed to actually notice it.
I wonder if the filter is dirty, and at those low speed cannot meet the demand... It is odd that putting it into 4WD eliminates the problem.
If it were me, I would inspect the transmission filter. They don't cost much, and a dirty filter plays hell with transmission manners.
"<i>this occurs at any speed between 40 -
80 KPH, not just at where the it should be shifting</i>
That is odd. It is not the differential, as I said. But it does appear it is not a shifting issue per se either.
20 to 40, that's pretty light duty, usually pretty low RPM. Of course, at a low load like that, the transmission letting go briefly might not allow the engine to gain enough speed to actually notice it.
I wonder if the filter is dirty, and at those low speed cannot meet the demand... It is odd that putting it into 4WD eliminates the problem.
If it were me, I would inspect the transmission filter. They don't cost much, and a dirty filter plays hell with transmission manners.
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mode door actuator inrear Hvac . The clicking is the actuator slipping it's gear's . Plastic gears break ,wear out etc....
You have to take right rear trim panel out to replace it > 2003 2006 Ford Expedition Rear HVAC Temperature Blend Actuator Clicking... Your having problem with the mode door actuator ,not temp blend door.
It could be 2 things the rear differential for the 4 wheel drive or the torque converter, " is this an auto ?" you may need to bleed the system through if this is the hydrolic set up, they have a slave cylinder and this can often be the cause if the fluid is low or has air in it.
Hope this helps Get bac to me if you require more info
ERIC HI I HAD THIS PROBLEM WITH MINE THE REAR END IS A LIMITED SLIP AND BINDS WHEN MAKEING TURNS AS IF IT WAS A TRUE POSI TRACTION REAR CAUSING THE GRINDING OR RUBBING NOISE YOU ARE HEARING I COULD FEEL IT IN MINE IT WAS SO BAD IT ONLY DONE IT WHEN STARING OUT TURNING OR GOING SLOW AROUND SHARP TURNS. TAKE IT TO YOUR LOCAL LUBE SHOP AND HAVE THE OIL CHANGED IN YOUR REAR END AND TELL THEM TO PUT IN THE ADATIVE RECOMENDED FOR THIS REAR END THIS SHOULD TAKE CARE OF YOUR PROBLEM MINE IS TOTALY GONE HOPE THIS HELPS
totally clean out your rear end,taking back cover off and spray with cleaner and air hose. reinstall with new gasket glue and add new oil, but put in 2 bottles of anti slip differential oil, then top with gear oil. make several figure 8 's til rear end fully distributes oil thru out rear end. if rear end is dirty you may have to repeat this action after5000 km. diff slip oil can be purchased at dealer
If you can read the tag on your rear differential cover it will tell you there. But just in case it's rusted beyond visibility here is what you need. A traction lock (limited slip) differential takes the synthetic 75w140. You may need some of Fords limited slip additive to prevent the clutch plates from grabbing as well. Conventional differential takes 80w90 no additive required. If you are not sure what yours is jack up the rear end, support it properly and block the wheels to keep it from rolling.. If yours is 4 wheel drive make sure it is disengaged and put it in neutral. Do not start engine. Grab one rear wheel and rotate it. If the wheel on the opposite side rotates the same direction it is traction lock
I have the 03 Expy with continuous rear air unit "clicking" or more accurately flapping of the air damper while the plastic gears in the 2L2H-19E616-AA grind away into toothlessness. Ford designed this unit to find the end of travel by jamming the motor to a stop and monitoring the current to determine when to stop applying voltage. That would probably be fine if the gears were designed to handle the jammed torque or the motor did not slip out of groove and continue turning and cracking the plastic gears.
There are two white colored boxes, one is for the temp plenum door, the other the upper/lower air flow. To be sure, do what I did, turn on the ignition, rear ac/heat and listen for the obnoxious click/thump as you move the temp control from full heat to full cool, you will know which part. Disconnect the electrical connector, four bolts and it is out!
Go to your dealer, part should be about $60 or less, look on line, lots of dealers sell for this or less on internet.
Too much grease? that is a load of u know what, I am aware of the slip yoke noise, there is a Technical Service Bulletin (TSB) form Ford, did he use the special Teflon Grease (a 100% must use) to lube the slip yoke? regular grease won't do. I also think you have something going on with the trans, has it ever been serviced (fluid and filter)? it should be done at least every 60,000 miles, worn out fluid can cause erratic shifting of the trans. I m a Ford dealer technician of 20+ years and a Ford certified Master Technician and ASE Master tech.
Thanks, however this occurs at any speed between 40 - 80 KHH, not just at where the it should be shifting?
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