Question about 2005 Ford Ranger

5 Answers

Hi, 2005 ranger when in 4 wheel a bump when pulling slight grade.I know it comes out of 4 wheel just for a second because rear wheels break free when in snow, but only for a second.Then operates fine until bump again, about a 1/4 mile in between bumps. Can anyone help.

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  • pinionfrst Apr 26, 2010

    I would think that a damaged ring gear would bump every revolution of the ring, which happens hundreds of times within a 1/4 mile. Very confusing because of the interval.



    Thanks Mike

  • pinionfrst Apr 26, 2010

    As stated before this bump does not seem cymetrical with each revolution of the pinion gear,but is directly related to 4 wheel use.

    Mike

  • pinionfrst Apr 26, 2010

    Hi,



    I respect your obvious understandind and experience. I too am no dummy. I hold a mechanical and electrical eng degrees, as well as a aviation AP licence. I have worked for Honda and General Motors. I have been reconized nationally for being the 35 in mechanical aptitude in the class of 74.I am only stating these facts so that you can establish a level of personel you are dealing with. Franckly I still do not know what is wrong with this truck, but I have never been beat yet and with your help and maybe others we will fix this little problem



    Michael

  • pinionfrst Apr 26, 2010

    I have a overall understanding of the mechanics involved in the 2005 ranger 4 wheel system. I have removed the transfercase electric motor and observed the operation and all function appear ok. All fluid levels OK and all additives seem correct. Engine output is very strong and pours like a kitten except for the bump.No ring gear whine or bearing rumble.

    Mike

  • pinionfrst Apr 26, 2010

    HI,

    I like this stuff. Let me ask, with the ranger the ring and pinion turn all the time since there is no device to disengage. This being the case do you recommend that I remove the cover and inspect the internals.



    Mike

  • pinionfrst Apr 26, 2010

    hi, Thanks for yhe coment. I have considered this and there is a rubber line that runs from the transfer caes. This lines runs from the transfer case to a plastic solenoid on left fender well This solenoid has two lines connected to it at top. There is a second rubber line from the solinoid to engine. I think it may go to intake manifold but have not followed because did not consider this to be a problem. I suppose that if manifold pressure drops on a pull that this may have some effect, but I am not familiar with system,



    Mike

  • pinionfrst Apr 26, 2010

    Trying to gather as much info as possible. ALL SUGGESTIONS SEEM LOGICAL . I WILL NOT BE ABLE TO CONTINUE DIGNOSIS FOR A FEW DAYS. THE FUNNY THING IS I HAVE COMPLETE CONFIDENCE IS THIS VEHICLE I DRIVE A HUNDRED MILES ADAY OVER MOUNTAIN PASSES IN CO. TRUCK RUNS GREAT EXCEPT FOR THE OCCASIONAL BUMP.WHEN IN 4X4. THIS TRUCK HAS A STANARD TRANS.

    MIKE

  • pinionfrst Apr 26, 2010

    THANKS i CHANGED ALL FLUIDS



    MIKE

  • pinionfrst Apr 26, 2010

    Hi, Monday morning and still looking for potential solutions to my bump problem when in 4 wheel drive. 1/4 mile incriments.

    Mike

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5 Answers

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  • Master
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Hello. Take your truck into a transmission shop, I recommend AAMCO. They will give your transmission a service which will solve your problem. This is not a do it yourself job. Joe

Posted on Apr 26, 2010

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  • Master
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Pinionfrst,

Drain the fluid in the transfer case, as well as the front and rear differentials (I use Lucas Oil as a replacement); check with the recommended fluid by manufacturer.

Add the new fluid and see if it does the same thing. If so, it sounds like an internal problem in either differential or the transfer case itself.

If this does not cure the issue, you may have a vacuum issue if there are vacuum lines that run to the tranny or transfer case.

Please let me know if any of these work.

carsandcomps,

Guru, Premium Expert @Fixya.com

Posted on Apr 26, 2010

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Hi! Since all answers are logical yet cant solve the problem. I suspect the front bushings, stabilizer bushings, transmission support and anything that has rubber specially parts involved on the transmission and steering. Some may be worn and needs replacement thats why you are experiencing sudden bumps. Hope this helps and have a good one!

Posted on Apr 26, 2010

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When the rear wheels break free do you notice weather the 4x4 lamp changes?

Have you had the computers scanned for codes?
You cannot go to the parts store for codes because the only one they can pull is the PCM codes
We need to know, ABS, TCM, ICM, GEM codes


here is a little theory to help you understand the system, I suspect your change is jumping either because of excessive load, bad tooth or gear...


The four-wheel drive electronic shift-on-the-fly feature electrically shifts the vehicle transfer case between 2WD, 4WD HIGH, and 4WD LOW. The system mode is selected by the operator through the mode select switch (MSS) on the instrument panel. The operator is informed which mode the system is in by two instrument cluster indicators: one for 4WD HIGH which appears as 4WD, and one for 4WD LOW, which appears as 4WD LOW. Shifts into 4WD HIGH can be made at any speed. When shifting into 4WD HIGH with the vehicle stationary, tooth blockage may occur preventing shift completion. When the vehicle is driven above 8 km/h (5 mph) the shift will complete. When shifting in or out of 4WD LOW, the four-wheel drive (4WD) control module requires that the vehicle speed be less than 5 km/h (3 mph), the brake pedal be applied, and the transmission be in NEUTRAL (automatic transmission) or the clutch pedal be depressed (manual transmission).
The gearmotor encoder assembly is mounted externally on the transfer case. It drives a rotary cam which moves the mode fork and range fork within the transfer case between the 4WD HIGH, 4WD LOW, and 2WD range positions.
The four-wheel drive (4WD) control module controls the gearmotor encoder assembly that shifts between 4WD HIGH, 4WD LOW, and 2WD modes.


Posted on Apr 26, 2010

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  • Ford Master
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Check your pinion gear for damage to the teeth if the ring gear in the differential "slips" the pinion; the electronic 4 wheel lock solenoid will "drop out " untill the gears mesh and, start to apply a load when the tires "bite" then: it will re-engage. This damage usually occurs due to a low level of lubricant in the case.

Posted on Apr 25, 2010

  • Jim Goldsmith
    Jim Goldsmith Apr 26, 2010

    I worked on a ford F350 4X4 that had a loose bolt on the saddle cap, the u-spacer that adjusted the ring gear to pinion clearance was loose and, there was some spurring (reduction) on one gear tooth on the helical ring gear and, just a bit of spurring on the pinion: In due time the differential would have worked loose enough to score all the gear top edges and, completely ruined the gear set. But, it only thumped when the wheel deflection by way of: the u-joint became great enough to "slip the gear set.

  • Jim Goldsmith
    Jim Goldsmith Apr 26, 2010

    As, you have choosen anouther expert to help with your problem:

    Thank you for using fix ya.

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