Feels like the rear wheels are slipping around 55mph
2001 F-150 4wd 5.4l engine. Around 55mph it feels like the rear wheels are slipping. It feels like a slight surge or ****. It happens a few times in a row then stops, then will occur a few minutes later.
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Re: Feels like the rear wheels are slipping around 55mph
First of all, do you have an automatic or manual transmission?? Cause if you have a manual tranny and only the rear wheels slip, then the problem should be in the rear differential. If you have an automatic, the valve bodys in the the tranny and a few other parts in there and in the transfer case may malfunction causing the the tranny and/or transfer case to switch from drive to neutral a few times fast. Also if you have an automatic tranny, start by checking ALL the oil levels in the tranny and transfer case cause any fluid missing might be enough to cause loss of pressure and cause such a problem, in which case just toping it off will solve the problem. Always good to check the transmission oil filter in the auto tranny cause a bad filter might cause clogs that will also give the same problem. If everything on the tranny and transfer case side is OK, then again the problem is in the differential. Also one last thing to be sure of is that the front and/or rear differentials have never been replaced or their ratios changed, cause if the front and rear differentials have the same ratio, or close enough to the same ratio, it will cause some weird skipping/slipping problems. That's why engineers make the front and rear differentials with different ratios.
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Check the tire inflation. Also, if you can jack the tire up off the ground, rotate the tire and feel across the top of the tread. If there seems to be any high/low spots or feeling of side-to-side tread movement, you may have a separated belt in the tire. This can cause the "loose" feeling you are getting.
this is what bad shocks do when they are worn out.have the rear suspension checked out first just in case something in the back is bad.if all okay then replace both rear shocks/struts.they act like this because there is no restriction in the hydraulic portion of the shock to keep the wheels on the road when hitting bumps.
Hello, If you have rear disc brakes check your Emergency brakes inside the rear Rotor hub. Sometimes the lining of the E brake will rust away from shoe and float inside the drum portion. It is more apparent after stops and after backing up a distance and then going forward.
There can also be clutches in the limited-slip differentials which can act up around corners. Some Models use a friction compound in the rearend to help the clutches work and on 4 wheel drive units the rear differential may use a synthetic gear lube while the front axle uses a normal lube.
Check your E-brakes and if you still have the problem, pop off the differential cover and see what is in the bottom of the housing. This will give you the opportunity to clean inside the axle housing and replace the lube with something you know belongs there.
I would bleed the rears too especially if the brake fluid reservoir drained empty. Also you may need to drive the vehicle to seat the brake pads. Check and see how the pedal feels initially before you road test to make sure you don't need to pump the brakes in order to stop. if you do then re bleed all four wheels.If you don't have to pump the pedal and it just feels spongy then try going around the block a few times and see if the pedal stiffens up after the pads have seated.
Your engine and transmission mounts need inspection. Replace as necessary.
Jack up your car and support it on jack-stands.
Rotate the front-wheels and pull it towards your chest to feel the condition of the wheel bearings.
Do the same for the rear-wheels.
As for rear bouncing around corner: your rear-shocks need to check.
Last resort is to do frame inspection.
Take the car in for a new serpentine belt and tensioner right away before you destroy the engine. The alternator, power steering pump and waterpump are not turning right now because the belt has come off. The battery will die soon because it is not charging, and the engine will overheat and perform it's own little rendition of the china syndrome. When the red warning lights in the dash come on, it generally means; park it unless you're being shot at.