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Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 12-05-2010
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Problem in 4wd

I know there have been a lot of threads up about 4wd issues cuz of the season and all, but I have one too. I have a 2004 Edge 4.0, with 4.10 gears, automatic, and the 4x4 switch on the dash.

I recently had the driver side hub bearing assembly replaced and I haven't used the 4wd in a long time (I'd say at least 5-6 months or more). I also recently had a transmission flush and an oil change less than 1000 miles ago. Also, had new rear brakes and a new brake master cylinder installed a couple months ago.

I tried to use it recently, I was in park, hit the brakes, turned the switch, light came on, heard it click, no problem. Then, I let off the gas, and tried to move it. It felt and sounded like I had the brakes applied still, like it was locked up.

It grinds like the brakes are locked up, and the tires sort of chirp and it jerks a little bit especially while trying to turn with 4x4 hi engaged. It also does it in 4x4 lo. I noticed some fluid, seeping from what looks like the front differential, but I can't really pinpoint where it is coming from. My friend also said it looks like I have an inner tie rod that is going bad on the passenger side.

My best guess is that I either have a bad transfer case, or the differential is f'ed up somehow and the gears inside are grinding. Any ideas on what it could be?
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Old 12-06-2010
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Bump...
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Old 12-06-2010
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This is a tough one.. As for the front diff leaking, it's more than likely the pinion seal or one of the axle (CV) shaft seals on either side.

The truck will always skip and screech a little bit while turning in 4 wheel drive. Depends on what type of surface you're on while using the 4 wheel drive though.

Can you get it up on a lift somewhere and actually try to start it and engage the 4 wheel drive. That might give you more clues on what's wrong, by having someone underneath watching while you try everything out..



GB :)
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Old 12-06-2010
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Yea, i dont have the option of a lift, and that sounds kinda dangerous, haha. By pinion seal you mean like rack and pinion? If my inner tie rod is f'ed up I suppose that could be the cause of the leak?
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Old 12-06-2010
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Nope Pinion Seal as In the Ring and Pinion in your d35 in the front

and the lift thing isnt dangerous seen it done all the time at the dealer and done it many times as well
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Old 12-06-2010
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Oh fun. So if I have the pinion seal leak then I'm looking at re-building or getting a replacement differential? Any root causes for pinion seal leaks? I'm not 100% sure, but I'm pretty sure the 01+ front differentials are live axles, meaning whether 4x4 is engaged or not... it is still moving? If that's the case, and I have an issue up there, I could leave me stranded if it blows out or something?
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Old 12-06-2010
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Mant people replace pinion seals and the outer CV seals on the diff and they still leak. Just sayin...

I'd spray it off at the car wash or get under it and scrub it by hand might be better, then keep an eye on it and see how long it takes for it to get covered again.



GB :)
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Old 12-06-2010
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That's probly the best idea for now. I was thinking the fluid could be residual crap left over from the tranny flush, oil change, or brake master cylinder replacement and flush. It's so dirty now, I can't tell what color it was originally. I guess I'll just keep an eye on it, but I'm open to any other suggestions. If I have to replace my differential, I'm just gonna re-gear, screw fixing it, upgrade! haha.
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Old 12-06-2010
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If you plan on getting another diff to rebuild and regear at your own pace, then try going to a Pick-a-part or a Pull-a-part yard. They sell them on the cheap! Get one, order a rebuild kit, and your gears, and go to town or take it to a shop to have it done professionally. It would have to be taken there anyway for the re-gear.


GB :)
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Old 12-06-2010
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Why does it have to be taken to a shop for a re-gear? Guess I never looked into it cuz I don't have the money, haha. But yea, I would definitely use pick-a-part and try to do it myself if I could save some money that way.
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Old 12-06-2010
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The mesh of the gears has to be set-up by a professional or at least by someone with the correct tools and the know-how to do it right the first time..


GB :)
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Old 12-06-2010
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Oh, so either way I'm gonna save money if I buy the parts first that way I don't get the gear shops mark-up for it.
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Old 12-06-2010
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Yeah, unless the shop has a policy of charging more if you don't buy the parts from them..


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