NS Dev
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| posted on 13/12/05 at 12:51 PM |
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Heh heh!!!
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froggy
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| posted on 13/12/05 at 03:50 PM |
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latest update : hillrally cars have used 7" diffs in the front and dmw diffs too .no major probs and not especially noisy, apparently they run
them upside down so that the pinion pushes the coast face of the crown wheel. i may have to look at some kind of internal baffle to stop the pinion
running dry !
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colintvr
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| posted on 7/1/06 at 09:57 PM |
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You could call Kevin Mason at Kam Diffs: 01483419779. They make crown wheels and pinions and would surely know.
Colin
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madman280
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| posted on 14/1/06 at 12:45 AM |
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The front diff on the Fords I work on everyday are designed to run "backwards so to say. The ring and pinion gear teeth are cut differently then
a normal rear diff. They are termed revese rotation R&P's in most catalogs. Hypoid gears are designed to run with the nomal drive load on
the convex side of the gear teeth. The diff case is also shaped in such a way that the oil is splashed up to the pinion bearings and then drains down.
A rear diff can work running backwards but pinion bearing life is usually very short and starts to get noisey quite quickly. I've seen a few
reverse rotation engines raced on the stock car dirt tracks around here. It does work, but its not ideal and requires constant attention.
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wment
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| posted on 15/1/06 at 07:13 PM |
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Running differential gears in the reverse rotation puts forward accelleration on the coast side of the gear tooth. The coast side is the angled side
and transmitts alot of the force toward the sides rather than stright back on the ring gear. I have reversed a chevy corvair transaxle to allow for a
mid engine application. It works but reduces the torque the unit can handle. I have a pic of a diff that was pushed apart from too much torque applied
to the coast side of the gears in reverse rotation, I will try to attach it.. Also running the gears backwards interfears with proper lubrication.
[Edited on 1/15/2006 by wment]
[Edited on 1/15/2006 by wment]
 
Rescued attachment DiffCracksTop.04.jpeg
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froggy
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| posted on 15/1/06 at 11:55 PM |
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il close this one now , the whole thing was my fault as i never thought to check the rotation of the props and although the rear turns clockwise the
front doesnt so thats why ive had to get a front diff etc. bit silly really as i managed to do the bellhousing conversion without any probs
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