Rear springs

[Showgoer]

Ok so I wasn’t able to find any used springs for my Comanche so I purchased from general spring. They are sitting a little high so my question is what can I do to get them to settle down or will they do it on there own and how long would it take for them to do so.

 

 

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[89 MJ]

Jump it, haul something heavy, remove a leaf. 

 

How long have have they been in?

[Pete M]

yup, how long and how much is a little?

 

throw something heavy in the back and wait.   or throw a small puck up front?

[Showgoer]

Jump it, haul something heavy, remove a leaf. 
 
How long have have they been in?

Just installed them today so was just wondering how long it would take to settle and legal out


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[Showgoer]

Just installed them today so was just wondering how long it would take to settle and legal out


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It lifted it about 31/2 inches


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[89 MJ]

9 hours ago, Showgoer said:

Just installed them today so was just wondering how long it would take to settle and legal out


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Give it a few days. It will settle at lease half an inch. 

[Eagle]

12 hours ago, Showgoer said:

It lifted it about 31/2 inches


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3-1/2 inches is not "a little" in my view -- and they won't settle by nearly that much.

 

This is why I advise people not to buy General springs. Stock replacement springs should ride at stock ride height ... period, full stop.

[gogmorgo]

When installing suspension components, snug up but don’t torque the pivot points until you’ve got it sitting back with weight on the wheels, and taken it for a spin around the block or at least bounced it a few times to let all the bushings find their happy places. If you torque the bushings with the suspension drooped, you’ll turn them into little torsion springs trying to push the axle back down.

 

Another point worth considering, what measurement are you comparing against your current height? There’s a thread in the DIY index about correctly measuring ride height with factory numbers.

Like any truck rated for a payload of roughly half its own weight, the MJ has a pretty significant rake from the factory, with the rear sitting about 2” higher than what most would consider level. You can see this in the promotional media from when the MJ was new, and it’s a fair bit more rake than you see with some of the other period small trucks, what with the MJ weighing less and being rated for more payload. If you’re comparing a height measurement on sagged springs to one after replacing the springs with new, you will notice a height difference.

But like Eagle pointed out, a few members over the years have reported General’s springs riding higher than expected. I think the military-wrap group buy springs were supposed to, if that’s what you ordered, but their other options do also seem to ride a little higher than factory. 

[WahooSteeler]

2 hours ago, Eagle said:

 

3-1/2 inches is not "a little" in my view -- and they won't settle by nearly that much.

 

This is why I advise people not to buy General springs. Stock replacement springs should ride at stock ride height ... period, full stop.

 

But were these Metric Ton springs?

[gogmorgo]

4x4 springs should sit an inch higher than 2wd, but the metric ton shouldn’t make much difference in ride height. The higher spring rate just means they compress less under load. 

[Eagle]

4 hours ago, WahooSteeler said:

 

But were these Metric Ton springs?

 

It doesn't matter. The factory metric ton springs didn't ride any higher than the standard springs. As Gogmorgo noted, the FSM gives a ride height for 2WD springs that's 1 inch lower than 4WD springs, but there is no separate specification for metric ton springs.

[Eagle]

5 hours ago, gogmorgo said:

 

Another point worth considering, what measurement are you comparing against your current height? There’s a thread in the DIY index about correctly measuring ride height with factory numbers.

 

 

 

[WahooSteeler]

1 hour ago, Eagle said:

 

It doesn't matter. The factory metric ton springs didn't ride any higher than the standard springs. As Gogmorgo noted, the FSM gives a ride height for 2WD springs that's 1 inch lower than 4WD springs, but there is no separate specification for metric ton springs.