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Old 02-15-2008, 16:20   #1 (permalink)
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Rear End Howl '96 Bronco

My '96 EB Bronco developed a new noise.... the rear end howls when I depress the gas pedal, but it stops when coasting. Mileage is about 96K.

I suspect my (stock non limited slip) rear ring and pinion are toast, so I may replace the rear end with a limited-slip. Other than an Air Locker, etc., what are the best less expensive options to a Ford Trak Lok LS upgrade?

Al

'96 EB Bronco with railroad "hyrail" attachment
'04 EB Explorer
'07 Escape
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Old 07-20-2008, 12:38   #2 (permalink)
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Re: Rear End Howl '96 Bronco

While it could well be the gear set, I find it more likely that a bearing is worn, possibly a pinion or differential. Doesn't really matter though since everything would have to be replaced for a rebuild. If you are concerned about the ring, pinion, or limited slip I recommend taking the cover off, cleaning everything, and replacing the fluid and the FRICTION MODIFIER. The friction modifier is what allows the clutches in the L/S work properly. Generally, a malfunctioning L/S causes a chattering noise rather than a howl, or it simply makes no noise and doesn't work at all. While cleaning the differential, you might apply some marking compound to the ring gear and check the pattern where the gears mesch. That might be a moot effort though.
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Old 07-20-2008, 12:41   #3 (permalink)
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Re: Rear End Howl '96 Bronco

one other thing,

If you are looking for a cheap replacement for the tack loc, I rebuilt a Dana 44 and a fully loaded lock rite L/S differential was cheaper than an open dif. Not sure if that would apply here but I love the way it worked.
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Old 07-20-2008, 15:10   #4 (permalink)
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Re: Rear End Howl '96 Bronco

Thanks for the response. I decided to bite-the-bullet and have a complete Trak-Lok rear end installed. Since it was in for work, I had all new universals installed front & rear, all new bearings and seals F&R, repacked the hubs, new greasable Upper and lower ball joints, plus I replaced the brake lines to the rear and one front line that was leaking. Cost for everything was about $3200.

It drives like new with a tight driveline.

Al
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