mopar sure grip rear diff ?
Mopar Fanatic
Joined: Jun 2009
Posts: 448
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From: Rensselaer,New York
sam, just jack up the rear end and with the tranny in neutral turn one of the back tires.If the other side turns in the same direction,it could be a suregrip,locker,or spool.If it turns the other direction it's an open rear end.
john
john
Mopar Lover
Joined: Nov 2007
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..............or just jack up one wheel, leave the car in neutral, make sure the parking brake is released
If you can turn the wheel, it's an "open" rear
If you can't turn it, it's sure grip/ spool, etc, as above
If you can turn the wheel, it's an "open" rear
If you can't turn it, it's sure grip/ spool, etc, as above
Mopar Lover
Joined: Apr 2009
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From: Michigan: The First Line of Defense From The Canadians!
Um, I thought if its an "open" rear, the other wheel would spin in the opposite direction. If you just jack-up one, it wont spin at all. If you get under there, look for numbers, or tags on the diff also. Might help to find your ratio also.
Last edited by scotts74birds; Feb 12, 2011 at 11:36 PM.
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Admin
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From: Goffstown, NH
You can actually perform this with the car in park. If the diff does have some sort of locking device that is in proper working order (sure grip, spool, locker, etc.), then neither of the tires will spin. If the diff is open (has spider gears in it only), then the tires will spin (one forward, one backwards) as the spider gears have the ability to spin freely from the carrier/R+P. The axle shafts slide into the side gears which in turn are "connected" by the spider gears that are being held in place by the carrier pin.
I know this works even with a sure grip that is completely worn out as Heathers' brother's truck is like this (just looked at it for a rear end noise yesterday and spun both back tires with the truck in park).
I know this works even with a sure grip that is completely worn out as Heathers' brother's truck is like this (just looked at it for a rear end noise yesterday and spun both back tires with the truck in park).
Mopar Lover
Joined: Nov 2007
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I just thought this might be quicker and easier
On a side note, if you DO jack up one side and the wheel DOES turn, remember this when looking for the ratio:
One an "open" axle, with one wheel up and the other down, the spiders multiply X2
So if you are trying to determine the ratio, you turn the wheel TWO full turns while counting driveshaft revolutions.
Obviously with a sure G/ locker/ etc, you have to have both wheels "up" and count just one turn of the wheels for the shaft ratio
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