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Early Ford V-8 Club Forum

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EFV-8 Club Forum / General Ford Discussion / Ford rearend

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Posted By Discussion Topic: Ford rearend

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flathead48
11-28-2010 @ 4:38 PM
Member
Posts: 314
Joined: Dec 2009
          
thanks to all, was just wondering, Happy holidays

Stroker
11-28-2010 @ 2:29 PM
Senior
Posts: 1460
Joined: Oct 2009
          
Rick:

The only time I have seen a breather on an early Ford banjo was at Bonneville, where the axle in question was equipped with a Halibrand quick-change center section, and an open drive-line. The combination of over 200 mph speeds, and the desire to not blow the seal on the front of the center section, (which was below the fluid level due to the layout of the quick-change) dictated this modification.

In a stock torque-tube set-up, the center section is vented to the torque tube, since there are no seals on the pinion bearings. The large volume of the tube, plus the fact that it really isn't tightly sealed at the interface with the transmission seems to preclude the need for a breather at the rear axle.

The 48 commercials, which used the early style banjo with an open drive line, might benefit, as they also incorporated a seal on the pinion shaft. The torque tube equipped cars, from the Model T to the 48 passenger cars don't need a vent.

The disadvantages of a vent are that unless regularly serviced (the filter media in the vent),
they can become clogged with dust. There is also the prospect of water intrusion if not properly placed, and all in all it is just one more place to get contamination in the final drive.

I can see no advantage, since any rear axle leakage problems at the ends of the axles tend to be a result of an overfilled rear axle, generally caused by transmission lube migrating down the torque tube, since there are no seals present from the transmission main-shaft to the rear axle ring and pinion cavity.

In other words, don't overfill the transmission.





jerry.grayson
11-28-2010 @ 2:27 PM
New Member
Posts: 128
Joined: Oct 2009
          
WHY???????????????

flathead48
11-28-2010 @ 12:24 PM
Member
Posts: 314
Joined: Dec 2009
          
has anyone ever thought about putting a breather on these rearends, pros and cons please, thanks, Rick

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