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rear axle |
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iwantmyx
AMC Apprentice Joined: Jun/14/2018 Location: texas Status: Offline Points: 45 |
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Posted: Jun/20/2018 at 6:43pm |
I just bought a 74 javelin. It used to have a 6 cyl in it but now has a 78 jeep 360 in it. They upgraded the trans to a 727 but the rear end has 9 inch drums and i am guessing 305 gears. It is not a p track. Must be an amc 15 rear end. Does it really need to be switched to an amc 20 or will it hold up and can i make it a p track with lower gears. Thanks in advance
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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I wouldn't put any money into the AMC15, drive it until it fails if necessary and then upgrade to something stronger.
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LakesideRamblin
AMC Addicted Joined: Dec/21/2015 Location: So. California Status: Offline Points: 2682 |
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Yep, try it out. It may work. But if you are mashing on a built 360 the 15 will eventually implode. As an alternative, you can always get a Ford 8.8 or 9 for a reasonable price and gear it accordingly. They are plentiful. It will all come down to how you handle your right foot.
Edited by LakesideRamblin - Jun/20/2018 at 7:56pm |
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LakesideRamblin
69 Rambler 360 73 Javelin 360 "If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month." T. Roosevelt |
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mixed up
AMC Addicted Joined: Jun/16/2015 Location: Monroe mich Status: Offline Points: 2156 |
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I agree with both drive it like a saint and it will hold up till you can get something stronger 8.8 ford are plentiful look at explorers rangers mustang 9 inch are a little hard get these days but possible
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69 amx 290 auto
65 220 290 4spd 80 ford fairmont |
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FSJunkie
AMC Addicted Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4741 |
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Being a standard open differential helps because in most situations it will just spin one tire before you can apply enough torque to the axle for it to go kaboom. The tire acts as a safety valve. However, that only applies during smooth applications of power such as flooring the throttle to pass somebody. You could floor that 360 around all day long and not blow the axle. You could probably floor it from a dead stop and it will be fine. Burnouts would probably be fine. It'll just spin tires and that will save the axle from going kaboom. But that doesn't apply for shock loads. You could still shock load the axle and break it. This could happen if you are spinning a tire and it suddenly grabs something grippy, like spinning the tire on a patch of ice then it grabs dry pavement. Kaboom. A rough shift or neutral drop could do it too. Burnouts on water then grabbing dry pavement, etc. Skinny tires and not much weight on them will help you too. So really it depends on lot of things. Edited by FSJunkie - Jun/21/2018 at 1:49am |
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1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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