Dual Rear Shocks
Lead Driver
Joined: Jul 2013
Posts: 9,263
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From: In the field...
Any 3/4 ton vehicle is going to react to bumps differently when loaded or unladen.
The front always has the powerplant in front and will react accordingly, the rear based on applied weights will react differently.
Find your happy place.
Moderator
Joined: Jul 2010
Posts: 12,051
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From: Media PA
Well OK then, that is the job of the shocks, to damped (and stop) the bouncing from going over bumps. Air bags could stop the bouncing IF you aired them up so high that the suspension didn't deflect at contact with the bump, but that might not be what you are looking for.
The EX was given some fairly crappy springs (front and rear) from the factory, upgrading to the springs from a SD truck will deliver better load handling and ride. Better load handling by having higher rated capacities and a better ride by having more travel up front (to stop the bottoming out) and the SD rears are a dual rate design that rides better, smoother. No matter what springs you end up with (even with an air ride/air spring setup) you will need good shocks to control the cyclic motion following a bounce.
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
Yes, that's my issue.
I have V code new OEM springs up front and C code DRW springs in rear.
This is just my opinion but it seems truck springs are designed to work with and empty/light bed and once loaded different rates kick in. Problem is the excursion is always heavy in rear. Heavier when towing but still heavier than a empty bed.
My 2012 E350 van with factory springs does not bounce over bumps. Granted if you are sitting in the back it will push you up off the seat. Why does my excursion with higher rated springs bounce? Spring rate?
Will any E350 rear springs fit an excursion? I think the van springs would be a better option as they are designed different than truck springs.
From what was said shocks control cyclic rate, mine cannot. Fairly new blistin 4600 series. They do fine up front but not inrear. Hience the reason for this post. So I need better shock? What shock would work?
I have V code new OEM springs up front and C code DRW springs in rear.
This is just my opinion but it seems truck springs are designed to work with and empty/light bed and once loaded different rates kick in. Problem is the excursion is always heavy in rear. Heavier when towing but still heavier than a empty bed.
My 2012 E350 van with factory springs does not bounce over bumps. Granted if you are sitting in the back it will push you up off the seat. Why does my excursion with higher rated springs bounce? Spring rate?
Will any E350 rear springs fit an excursion? I think the van springs would be a better option as they are designed different than truck springs.
From what was said shocks control cyclic rate, mine cannot. Fairly new blistin 4600 series. They do fine up front but not inrear. Hience the reason for this post. So I need better shock? What shock would work?
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
Funny, 12 shocks in rear!
I am starting to think that my 4600 series shocks are wrong for my setup. Since the new springs raised the rear a couple inches they may be over extended. I will spring for a couple 5100's and see what happens.
I am starting to think that my 4600 series shocks are wrong for my setup. Since the new springs raised the rear a couple inches they may be over extended. I will spring for a couple 5100's and see what happens.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
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I think you'll like them a lot more than what you have. My front end bobs more than the rear does, even when unladen. Mind you it's not ridiculous bob, just a little more than the rear.
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
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Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
5100 shocks in rear, and HDs in front are just the ticket. Not sure why, could be rear HDs were just a tad short or valved different but rear of X is much more stiff and does not bounce like it did before with the HDs back there.
Really like HDs up front.
Thanks for all the help.
Really like HDs up front.
Thanks for all the help.
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