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Old 01-13-2011, 09:01 AM
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Drive line "slip" and "jerk" with Ranger 4WD

I've got a difficult to describe symptom occurring with my 2005 Ranger 4WD. About the closest thing I can compare it to is when your rear wheels momentarily slip on an ice patch and then hit dry pavement and grab.

The symptom is present in both 2WD and 4WD (although seems more prevalent in 4WD) and on dry pavement as well as snow/ice. The slip and grab occurs as often as once every 2-3 minutes and can then go away for 10-15 minutes. It occurs when just starting out as well as when the truck and running gear are fully warmed up.

It is difficult to pin down, but it seems to be coming from the rear of the truck, not the front.

This is a totally new one to me, so looking for clues and diagnostic approach.

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Old 01-13-2011, 09:20 AM
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remove the drive shaft and clean and grease the slip joint .That was [is] a common ford problem . Hope it is yours , good luck .
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Old 01-13-2011, 11:07 AM
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Equa-loc possibly?? Most if not all of Ford's 4x4's have it and while I have not heard of many failures with this 8.8 version, they do occasionally. Had a '94 T-bird with that 8.8 Equa-Loc rear end that had to be replaced under warranty tho it was the IRS version (it was replaced at the same time as the torque converter that shuddered - now that was an interesting ride when both problems occurred at the same time)

I would probably do a gear lube change with the correct Ford friction modifier first - and hope!!!!

Dave W
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Old 01-13-2011, 11:38 AM
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it probably is somthing with the traction lock.. but Ranger guys swap them in all the time without setting them up or even checking them, and they tend to live.

It's not an FX4 LII with the Torsen rear differential is it?
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Old 01-13-2011, 12:33 PM
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you might try the ranger station, ive learned alot from this site.
these guys have alot of info
http://www.therangerstation.com/
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Old 01-13-2011, 04:22 PM
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Dewey, Are you %100 sure it's a driveline problem ?



Cole
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Old 01-13-2011, 08:14 PM
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Quote:
Originally Posted by eloc431962
Dewey, Are you %100 sure it's a driveline problem ?
No, but it sure feels that way.

Also, thanks to all for the tips. This is a very standard Ranger. Spec sheet just says its a "4.10 ratio regular axle" and has the electric shift-on-the-fly 4x4 system. BTW, it also has the 5-spd automatic O/D trans.

I'm going to try cleaning/greasing the driveshaft first...as soon as I can get out and get it up on ramps.
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Old 01-13-2011, 08:29 PM
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Quote:
Originally Posted by eloc431962
Dewey, Are you %100 sure it's a driveline problem ?



Cole
Being it does it in both 2 and 4 wd, I would suspect the tranny first.
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Old 01-13-2011, 09:11 PM
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Quote:
Originally Posted by cboy
No, but it sure feels that way.

Also, thanks to all for the tips. This is a very standard Ranger. Spec sheet just says its a "4.10 ratio regular axle" and has the electric shift-on-the-fly 4x4 system. BTW, it also has the 5-spd automatic O/D trans.

I'm going to try cleaning/greasing the driveshaft first...as soon as I can get out and get it up on ramps.
Dewey, I have a similiar Ranger; 2004 EDGE w/4wd, 4.10/8.8 diff, 5R44E
trans, and I experience the same 'slip'. Mine happens when starting off from
complete stops, and is very slight but discernable nontheless. I haven't
thought too much about it, and have attributed it to slack in the
transfer case chain. Mine also vibrates slightly at a certain speed, when
lifting off the throttle. This I'm sure is the T-case chain vibrating.

There's a weight bolted onto the T-case that's supposed to absorb
harmonics, so Ford must have been aware of a vibration problem with
this particular setup and attached the weight as a fix.

Way to go Ford.

I suspect these problems are exacerbated by the use of ATF as a
lubricant for the T-case. That's very light lube in my opinion, but it
does increase MPG, which is why it's specified I'm sure......

ROE
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Old 01-14-2011, 01:41 AM
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It's not the transfer case. the Electronic shift 1354 has been used since '86 or so, and it is pretty much the same thruout the years. however, the 5R44E ( 3.0L V6 ) and 5R55E ( 4.0L V6 ) have had some issues, and IIRC there is a symptom like that, and it's a problem with a solonoid.. also, check the shackles, and if your truck is an extended cab with a steel driveshaft, there may be a recall.

I'v had 3 Rangers. there good trucks, but in my experience. better with 3 pedals
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Old 01-14-2011, 05:37 PM
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I think Matt167 is correct. I had similar problems, and it turned out to be a transmission solenoid. When the problem first started, it happened only when the truck was cold (however cold you can get here -- 30's or 40's overnight this time of year) but eventually it began to occur pretty much anytime. IIRC there is a group of solenoids in/on a control plate, and there is now a newer control plate version that helps to mitigate the problem. I don't do my own AT work, at least not often, so I don't have personal experience 'looking' into the problem.

Pat
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Old 01-14-2011, 09:27 PM
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Matt167 and PatM, you're right about the solenoid (EPC) and separator
plate problems with these trans. I experienced these several years
ago on the wife's Explorer. The symptom is a sliding shift into 2nd
or 3rd gear, AKA a 'flare'.

However this won't explain the slip if the trans is already in 1st gear
and starting out. It is the cause if the truck is in motion and shifting gears.

Maybe Dewey will clarify for us.

Hello Dewey?

Dewey.....?
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Old 01-15-2011, 08:36 AM
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Quote:
Originally Posted by Runnin'OnEmpty
...However this won't explain the slip if the trans is already in 1st gear and starting out. It is the cause if the truck is in motion and shifting gears. Maybe Dewey will clarify for us.
The slip-n-jerk is not occurring at a shift point but rather at highway speed when the truck is just cruising along.

HOWEVER, until fairly recently I did have another problem which may or may not be related. When the truck sat for a period of a couple days or so, it would sometimes hesitate when you first started it up and put it into gear. It was comparable to when you park in slush or wet snow, it turns very cold, and the tires freeze to the pavement. I would put the truck in gear and nothing would happen until I gave it some gas and it would break loose with a bit of a jolt.

My diagnosis on that problem was that one of the sliders on my front right brake caliper had seized up and had worn the brake pad at a very sharp angle. In fact, it had worn so deeply at one end that it was into the metal. My theory was that brake pad and rotor were actually corroding together or binding up due to that metal on metal contact whenever the truck sat for any period of time (a couple days or more). I replaced the pads and rotors a couple weeks ago and that problem no longer occurs. But with the discussion of the solenoids etc., I'm wondering now if the two might not be related in some way.

Perhaps I should just break down and take it in to my Ford dealer. They may know right away if it is something related to a recall (although I don't think I've ever received a recall notice and I've owned the truck since mile one).
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Old 01-15-2011, 09:09 AM
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Quote:
Originally Posted by sqzbox
Being it does it in both 2 and 4 wd, I would suspect the tranny first.
I agree Sqz.


Some food for thought, I just want to throw this out there for you Dewey, It doing this at hwy speed tells me that it could be a injector acting up also. JMO
I have seen and owned one that did exactly what you are describing and it turned out the injector.
Injector or in the trans JMO i am thinking injector at this point.JMO

Cole
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Old 01-15-2011, 01:31 PM
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cboy -- Sorry, I didn't realize that the problem was happening on the freeway. Mine always happened at a stop. Coming to a stop it seemed the trans shifted out of gear, but failed to shift into first. It seemed that putting the shift lever into first helped, but it didn't always go into gear even then. Wish I could help.

Pat
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