Author Topic: Is it true no Eagles were factory twingrip or other posi?  (Read 5264 times)

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Offline maximus7001

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #15 on: December 10, 2011, 05:17:24 AM »
So has anyone here put a twin grip into the rear of an Eagle? The trans place I deal with gave me a price of $500 tax in for the upgrade, thats $360 for parts plus 1hr labour plus 12% tax.

I am considering this upgrade and heres why:

My sister and I each bought a 1997 GMC Safari AWD at the same time(still have mine). Both vans had Blizzak tires but mine has a G-80 LSD in the rear and hers an open diff. Drove hers a few times in heavy snowfall and got stuck 2 times, never been stuck with mine in 14 years. With mine I once towed a broken Zamboni off an ice rink and it was like dry cement.
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Offline rollguy

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #16 on: December 10, 2011, 10:33:53 PM »


My sister and I each bought a 1997 GMC Safari AWD at the same time(still have mine). Both vans had Blizzak tires but mine has a G-80 LSD in the rear and hers an open diff. Drove hers a few times in heavy snowfall and got stuck 2 times, never been stuck with mine in 14 years. With mine I once towed a broken Zamboni off an ice rink and it was like dry cement.
WOW!  that is impressive!  Not every day someone gets the chance to pull a broken Zamboni! (And now for today's history lesson, Frank Zamboni was the originator of the ice resurfacing machine in 1949, first one made from a JEEP).  I have owned 2 Astro vans and I liked them a lot.  I have only seen 2 AWD Astro/Safari vans (not much need here in CA), and wondered how they would do in inclement weather.  
« Last Edit: December 10, 2011, 10:39:12 PM by rollguy »
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1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
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Offline AMCKen

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #17 on: December 19, 2011, 10:44:36 AM »
I have a 3.55:1 twin grip out of a 4cylinder SX4.  Proper code stamped an all.
39Master85w.partscar,67Marlin343,68AMX343,70Machine,73Matador2drht401,
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Offline IRON HORSE

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #18 on: December 21, 2011, 04:50:57 PM »
Hi :hello:

    Use of a locker or limited slip might prevent those axles from breaking ?????? maybe.
     
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Offline captspillane

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #19 on: December 24, 2011, 09:52:56 AM »
A locker or limited slip will always increase the torque on the axles. If the axles are locked together, all of the engine torque must be transfered directly to the axles. With an open differential, there is a torque split and there is often less than the total engine torque actually being transfered to the wheels.

Alot of Jeep owners abuse their stock axles for years without problems and then immediately break them as soon as a locker is added. Many odd driving situations that would not normally break an axle will be able to once the locker is added. That's especially true of someone who is accustomed to approach slippery conditions by stomping on the gas. Especially with the stock axle, you will need to be much more cautious and gentle when you accelerate after the locker is added. That's both to prevent breaking an axle as well as to prevent it from locking up and giving your car a slap in the butt around curves.

The good thing is that the axle shafts themselves don't normally break from torque, they break because of flex. A locker just increases the amount of torque the axle sees, and most shafts won't mind. The rigidity of the axle housing is important. The reason my family has had three Eagle axles break is because my brother and I were fond of jumping and tilting our Eagles on two wheels, which the thinner axle tubes could not handle. The center casting is actually identical to the Cherokee rear axle, but its called an AMC 15 because the tubes are thinner.
« Last Edit: December 24, 2011, 10:00:43 AM by captspillane »
Currently Inspected and Insured as of Jan 2013:
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-1980 Eagle Station Wagon 258 Auto Fuel-injected with GM TBI

Minor Repairs Underway:
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-1982 SX4- 4.0 AW4
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Future Rescue Efforts- '85 Maroon SW, '87 Limited SW, '84 Limited SW, '87 4 door Sedan, '81 2 door Sedan, '88 White SW, '77 4 door Hornet, '74 2 door Hornet, '79 Spirit AMX, '81 Kammback.

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Offline idahoeagle

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #20 on: September 30, 2012, 10:47:02 PM »
I haven't seen an Eagle with a limited slip diff before, at least not factory... I have had a few fullsize Wagoneers over the years with them though. Some with 219s and one with a 229. I lived in middle of nowhere Wyoming when I had the last one with the 219 and limited slip rear. It was phenominal in the snow. Definitely would be a crazy benefit in snow country in an Eagle...
Built 81 SX/4 under construction...
AMC 360, 727, 208, SAS GW 44 front on leafs, AMC 20 on S10 Blazer inconsiderate person pack, 33" tires, custom winch bumper, etc, etc...

Offline idahoeagle

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Re: Is it true no Eagles were factory twingrip or other posi?
« Reply #21 on: October 06, 2012, 11:29:01 AM »
You'd have to regear it, but there is an AMC 20 that is the correct width and bolt pattern to use in an Eagle... It was used in 86 only Metric Tonne Comanches. They had 4.10 gears. A very small number had a Trac-Loc limited slip. And an even rarer version actually came from the factory with a Detroit Locker... That was some kind of government special package... You could take a Trac-Loc from a fullsize Wagoneer/Grand Wagoneer from 1980-86 and gear it with 3.54/3.55s and have a great bullet proof rear...
Built 81 SX/4 under construction...
AMC 360, 727, 208, SAS GW 44 front on leafs, AMC 20 on S10 Blazer inconsiderate person pack, 33" tires, custom winch bumper, etc, etc...

 

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