Wheel Bearing Problems

[themailman007]

Hello I Have A 79 Bronco & The wheel Bearings Keep Going bad I have replaced them twice this year i have 31 spline axels i do have a 9-3/8" hog head some call it a 9-3/4? i have 35" tires the hog internals ring,pinion, all internals are all new this is becoming a big problem please help

 

[Seabronc]

Is it possible that you are tightening the spindle nuts too tight? The front spindle nut should only be torqued to about 50 ft. lb while wiggling the wheel to set the bearing and then backed off about a 1/4 turn to allow the lock washer toseat on the little *** and then torque the outer nut to 150 ft. lb.

Good luck,

>-

 

[themailman007]

Hello I Have A 79 Bronco & The wheel Bearings Keep Going bad I have replaced them twice this year i have 31 spline axels i do have a 9-3/8" hog head some call it a 9-3/4? i have 35" tires the hog internals ring,pinion, all internals are all new this is becoming a big problem please help P.s. This Is On The Rear Axel Ford 9"

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[Ziggy]

Could be you have a bent shaft and don't know it, this will cause an uneven load on the bearing and causing it to fail.

 

[themailman007]

Could be you have a bent shaft and don't know it, this will cause an uneven load on the bearing and causing it to fail.

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Thanks i Will Try to put the axel in my leath to check how true it is

 

[Seabronc]

OK, sorry, should have realized that you were talking about rear bearings. I was just looking at my shop manual and found a note about early failure of rear bearings on a 9" axle.

How did you install the bearings? Did you use the bearing tool? If not, the note reads as follows, "CAUTION: Installation of the bearing or seal assembly without the proper tool may result in an early bearing or seal failure. If seal becomes cocked in the bore during installation, remove it and instll a new one".

The only other thing I can think of is the level of gear oil in the rear end being too low, but that probably wouldn't be the case if you have replaced the bearings lately.

Good luck,

 

[Broncoholics]

I always had the rear bearings pressed on by a shop until I had a rear axle pop out the 9" turning around in the sand. Nothing was out of the ordinary except the bearing popped off the shaft. I now use a long piece of box tube, slip the bearing on the shaft and insert the shaft inside the box tube and pound with a hammer on the other side. Goes right on and never have had problems since.

I bet your problem is a bent shaft though...