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Old 12-15-2011, 10:10 AM   #1
Hux
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Better ride quality

Hi, I have a 4.0l 1994 YJ with 31" muds but otherwise stock and I need to make the ride smoother! I broke my back on a bike when I was young and also have just had a perforated bowel, it's just about ok on the road but I can't take it off road as it's just too harsh. Any advice on making it smoother? Coil spring conversion / different shocks / springs??

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Old 12-15-2011, 10:53 AM   #2
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drop your tires 3-5 lbs each, thats a start. (my hips are bad...) unless you take turns at 80mph... Aside from that I picked my dad up (for $40) this thing called ergoseat. Its awesome, he has degenerative bone disease and the cushion is in his TJ.

And, if you really want to go far w/it you can get seats made out of parachute cord that obsorb a lot of the shock.

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Old 12-15-2011, 11:56 AM   #3
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if your still running stock springs...they are probably flat and worthless. get a set of soft leaf springs, decent shocks, ditch the trackbars and sway bars and run the biggest tire you can on low air pressure.
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Old 12-15-2011, 12:04 PM   #4
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It has had replacement springs fairly recently, as far as I know they are equivalent to standard ones.
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Old 12-15-2011, 12:05 PM   #5
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What sort of air pressures are ok?
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Old 12-15-2011, 12:35 PM   #6
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Depends on on the tire/wheel combo, but 35 PSI is too much. 25-30PSI is about right for the street, but you'll need to experiment a bit to see where the ride is good and make sure it still doesn't wander. Off road I air down to 10-12 lbs, but with some wheel tire combos you could lose a bead down that far. 15 is a good starting point offroad.

Coil spring conversions would do, but extremely pricey. The biggest thing about the harsh ride is
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Old 12-15-2011, 12:51 PM   #7
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It has 31" mud tyres on steel rims, they are Kingpin remoulds, not sure if you get them in the States?
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Old 12-15-2011, 12:55 PM   #8
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How much would I be looking at to put softer springs on? Would I need to do the shocks as well? It's not that easy to get parts in the UK!
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Old 12-15-2011, 12:59 PM   #9
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if you replaced the springs recently i would not bother replacing them again.
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Old 12-15-2011, 01:07 PM   #10
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yeah, start w/tires. Mine were at 35 psi (33 12.5) at it felt like a scateboard hitting bumps on a sidewalk! I found 30 to be a good level for mine without being over or under inflated. You may take a slight hit on your current gas mileage a little, but test it. You might be surprised. I had quite a noticable differance hitting bumps.
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Old 12-15-2011, 01:49 PM   #11
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on my 33s i run 22lbs front and 20lbs rear year round on the street. rides much better than 35lbs and doesnt slip around as much in the snow.
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Old 12-16-2011, 09:38 AM   #12
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Quote:
Originally Posted by Hux View Post
How much would I be looking at to put softer springs on? Would I need to do the shocks as well? It's not that easy to get parts in the UK!
Actually stock springs are softer than aftermarket lift ones (for the most part). The arch in a lift spring will cause a slightly harsher ride regardless (for the most part again). One mistake that is common when lifting a YJ is tightening the shackles before lowering the Jeep to the ground. If that is done or the shackes are too tight, then that can cause a rougher ride as well. Good idea to take a torque wrench and find out how tight they are.

That said, a good aftermarket seat (such as a suspension seat) will make the ride feel much smoother by absorbing some of those bumps.

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