gmoran1469

Does it help with the weight transfer to the front of the car or is it still very harsh like with a panhard w/ roto joints.

I run the UMI 1055 w/ rotos on either end and it's redonkulous the way the weight transfers to the front of the car when you let off the gas, and it's exaggerated at lower RPMS in lower gears. First is a nightmare and, unless you drive the car every day like me, will definately start a "bucking session" if you don't feather the clutch.

I don't get much front-end nose dive, it's more rear-end hike if you get what I mean.

I am just wondering if a watt's link will help with this or if maybe I need LCA relocation brackets or something.

Whiskey11

What is your complete suspension set up? This to me sounds more like a damping (shocks/struts) issue and a spring rate issue then a lateral locating device issue.

A watts primary advantage is a lower rear roll center which translates to better rear end grip in roll and completely symmetric handling. I'm not sure how a lower rear roll center effects longitudinal forces in acceleration and braking though. This would be a good question for Norm to answer as he has more experience than I do in that matter.

gmoran1469

Hrmm... Thought my setup was in my sig... one sec

Edit: There it is... Wonder why it didn't show on my first post...

I've been having this same prob for a while and I just can't figure it out. I've double checked everything three times.

Norm Peterson

Define 'harsh'. How long has this been happening? How long since the springs and shocks went in? Did they go in together?

If it's a matter of how fast the rear moves up, the first place to look is at your rear shocks (specifically for their damping in rebound) to be shot - though it almost sounds like one end of both of them isn't even connected.

When this happens, does the tail rise 'overshoot' its upward travel and come back down a little without you lifting off the brakes any?

I can't imagine the suspension geometry being far enough off or the control arms being sufficiently loose without giving other symptoms, but check their bushings and joints for play/condition even if you have to disconnect one end to do so. With the car sitting with full weight on the wheels, this sort of looseness may not be apparent.


The PHB, its construction or end types, and its height have no measurable effect on what you are observing. Nor will a Watts link fix it. Those devices are involved with lateral location of the axle, not fore/aft axle location, anti-squat/anti-lift, or pinion angle control.


Norm

gmoran1469

Harsh is a jerk forward when I am in first and let off the gas, no brake, just lift my foot. So much of a jerk that it feels as if something is loose somewhere. The best way to describe it is to imagine if it wasn't a unibody and where you sat attached to a frame and it wasn't bolted well to the frame. Hard to explain.

Been happening for past 8 months at least, got exaggerated when I put in the LCA and UCA, or so it seems, maybe I was just expecting a change. I took it to a shop and was told the LCA and UCA bushings were blown so I replaced the entire 3-link except for the UCA mount on the unibody side. Even swapped to a urethane bell housing bushing.

Shocks and springs went in together February of 2010, or so my log on another forum shows.


I'll give that a shot. I'll put it on the rack and disconnect both ends one at a time to see if either has play. I can tell you when I put them on they didn't, I made sure of that because that was exactly what I thought the problem would be.

The only way I can think of to demonstrate the harshness it to put a glass of water or something in the car and video tape it so I will try that I guess.