Eddie, The 4-speed 151 should have a 3.54:1 ratio. My buddy had the 151/4-speed Eagle in highscool. I had the Spirit 1.51/auto (3.08:1). He could ALWAYS beat me off the line ... I hated that, LOL! My dad has 2 Eagle parts cars. One is a 1980 with full time 4wd. 258/4-speed car. The other is a 1983 258/5-speed car. Both are located here in Michigan ... a we bit of a drive from Tehas. The Eagle rearends a bit wider than the 2WD cars, if I remember correctly. Kind of like a Wide Track Eagle rearend, LOL! I think that a Commanche Dana 44 (Metric Ton) will bolt in, also. If I remember correctly, the code might be stamped into the machined surface of the differential housing, to the right of the diff cover. Check there, also. Greg Taylor :) <>< Eddie Stakes <eddiestakes@xxxxxxxxxxxxxxxxxxxx> wrote: My rear end went out on my 1981 Eagle. It is a 151-4cyl, 4speed. The mechanic told me it would be better to simply replace who end to end, as opposed to trying to locate all seals, gears, as it is really torn up inside, ring and pinion are shot, not sure about axles. There is a thread on the eagle's Nest AMC site about my car, of which is sitting patiently at the shop a block over. 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. CODE STAMPED ON RIGHT SIDE AXLE TUBE BOSS Regular gear: EE=3:54:1 F=3:08:1 G=3:31:1 H=2:73:1 J=2:37:1 K=2:53: For Twin Grip however: FF=3:54:1 T=3:08:1 S=3:31:1 U=2:73:1 2:37:1=not available V=2:53:1 So you can see how stumped. I don't know if I am looking in right place or need to crawl under car facing forward like earlier AMCs were stamped. The A and 2 are on the axle tube just immediately right of the pumpkin where it is flared and meets the pumpkin. And facing the rear of car. My mechanic told me if I just find a rear end, regardless of gear, he could drop it in, and would disconnect the front so it would be 2WD only. Any advise is appreciated, and well, feel free to comment, if you want to cope reply directly to me at eddiestakes@xxxxxxxxxxxxxxxxxxxx that's fine, or just post here, the more the merrier. Would also like to hear from anyone who might be parting out a Eagle. I have been told that only Eagle rear ends fit Eagles, for some reason thought I could shove a old Spirit/Eagle/concord rar under it but guess not. Eddie Stakes eddiestakes@xxxxxxxxxxxxxxxxxxxx _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list --------------------------------- Never miss a thing. Make Yahoo your homepage. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080228/8f1bdca6/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list