Re: [Amc-list] eagle rear end HELP/ADVISE wanted

[Frank Swygert <farna@xxxxxxx>]

Eddie, if it performed pretty good with the 151 it MUST have a 3.54! But to be sure, just take the back cover off and count the teeth on the ring gear. 3.54 will have 46 teeth, 3.31 43, and 3.08 40. There's no way that four could have had anything less than a 3.08 gear, and I seriously doubt it's anything but the 3.54. 

Just to please everyone, the pinion on all three has 13 teeth -- you might want to try to count pinion teeth, but I don't think it's necessary, and it would be hard to do without removing the differential first. If the 151 car had a 2.xx gear it would hardly get out of its own way, and have a bigger pinion gear (15-19 teeth). To find the actual ratio, divide the number of teeth on the ring gear by the pinion gear, then drop all but two decimal places. 46/13=3.5484615, or 3.54. Some companies round to the last two places and would call AMC 3.54 gears 3.55, doesn't make much difference either way. 


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Date: Thu, 28 Feb 2008 12:05:24 -0600
From: "Eddie Stakes" <eddiestakes@xxxxxxxxxxxxxxxxxxxx>

My rear end went out on my 1981 Eagle. It is a 151-4cyl, 4speed. 

I'm having trouble ID'ing what gear is in there. The book sez it should have 
a 3:54:1 or at least that is what the 151/4sped came with. The book also 
shows that the gear size is stamped on the right hand boss. I crawled under 
there this morning again, cleaned it off really well, and to the left of the 
pumpkin there is a "A" with a circle around it. Farther over there is a 2 by 
itself. This is what I have in the book however, and no A or 2.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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