AMC Differential Ratios

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   That 4.10 I have listed is just the AMC 20. The list I posted is 68 and up so that AMC 15 4.11 is likely earlier. That stated the 2.76 could also be earlier then 68 and your memory may still be intact! Me - just jumped over the 2.73's in my list so maybe I need the tune up.

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Lyle Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772	Post Options Post Reply Quote Lyle Report Post Thanks(0) Quote Reply Posted: Feb/18/2017 at 5:31pm
	That 4.10 I have listed is just the AMC 20. The list I posted is 68 and up so that AMC 15 4.11 is likely earlier. That stated the 2.76 could also be earlier then 68 and your memory may still be intact! Me - just jumped over the 2.73's in my list so maybe I need the tune up.

ccowx Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510	Post Options Post Reply Quote ccowx Report Post Thanks(0) Quote Reply Posted: Feb/19/2017 at 1:16pm
	In the 68-74 time period, the ratios available in passenger car model 20's were: -2.87 -3.15 -3.54 -3.91 In addition to the above, the following gears were available dealer installed: -3.73 -3.91 -4.10 -4.44 -5.00 Lyle has already listed the part numbers above. Jeeps have had some other gears over the years, but I am not a Jeep guy, so others will know better. Aftermarket also has some others, such as 3.31, but I am not 100% familiar. Generally speaking, the automatics had 2.87 standard with 3.15 and 3.54 optional. Stick cars tended to be 3.54 with 3.15 and 3.91 optional. This could vary by model and year, but above is a general rule. Available now is 4.11, 3.73, 3.54, 3.31 and I am sure some less performance oriented ones, though again I have not checked them out. I hope that helps! Chris

JodysTransmissions Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Oct/02/2012 Location: Reading, PA Status: Offline Points: 89	Post Options Post Reply Quote JodysTransmissions Report Post Thanks(0) Quote Reply Posted: Feb/21/2017 at 6:35am
	You guys are great and have such a wealth of knowledge. Are there any vendors who manufacture new differential gearsets?
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Red Devil Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jul/10/2007 Location: Canada Status: Offline Points: 1743	Post Options Post Reply Quote Red Devil Report Post Thanks(0) Quote Reply Posted: Feb/21/2017 at 11:13am
	If looking specifically for AMC 20, just do a Google search for AMC 20 ring & pinion. Not sure how many actual manufacturers there are, but lots of branded sets ... Richmond, Yukon, G2, Motive, Crown, etc. Check most automotive gear sites, Jeep sites, Jegs, Summit, etc. https://www.summitracing.com/int/search/part-type/ring-and-pinion-gears/axle-model/amc-model-20/

DesertAMX Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Apprentice Joined: Aug/10/2010 Location: Arizona Status: Offline Points: 104	Post Options Post Reply Quote DesertAMX Report Post Thanks(0) Quote Reply Posted: Feb/22/2017 at 5:24pm
	Also check out Randy's World Wide, formally Randy's Ring and Pinon. I have purchased AMC 20 Gear sets and also bearings and shim packs from them. https://www.ringpinion.com/
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