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Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!sdchema!sdcc3!sdcc6!ix1037
From: ix1037@sdcc6.UUCP (Christopher Latham)
Newsgroups: net.auto
Subject: Re: Wrong!!
Message-ID: <1937@sdcc6.UUCP>
Date: Fri, 1-Mar-85 11:54:11 EST
Article-I.D.: sdcc6.1937
Posted: Fri Mar  1 11:54:11 1985
Date-Received: Mon, 4-Mar-85 06:47:46 EST
References: <617@topaz.ARPA> <289@mhuxj.UUCP> <895@vax1.fluke.UUCP> <1927@sdcc6.UUCP> <910@vax1.fluke.UUCP>
Organization: U.C. San Diego, Academic Computer Center
Lines: 26

> > 
> > As a matter of fact on some four wheel drive vehicles the front and rear
> > ratios are slightly different. 4.10 to 1 as opposed to 4.11 to 1 for
> > example. For the intended use of conventional 4WD, that is off paved
> > roads, this does not present a problem because there is sufficient slip
> > due to the nature of the road.
> > 
> > Christopher Latham
> > U.C.San Diego
> > Dept. of Applied Mechanics
> > and Engineering Sciences
> > ..sdcsvax!sdcc6!ix1037
> 
> Because the front drive shaft is offset, the difference in differential ratios
> is probably to compensate for some gearing in the transfer case.  The wheels
> would then turn at the same speed, front and rear.  This makes the only sense.
> Since most people know so little about 4W drive train components, I am willing 
> DAC

Actually the ocassional difference in ratios from front to rear probably has 
more to do with availability of ratios in a suitable sized differential
for the load capacity. My present 4WD (Mitsubishi truck) has exactly the same 
ratios front and rear as do my brother's Jeep (It's been in the family since 
'68) and my folk's IH Travelall.

Chris