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pete 379 regular air leaf ride height.

Question:
Hey gang,
here is one of the situations with the new car that I would like to see what my options are. It has regular air leaf on it, and 24.5 low pros. My fifth wheel height is 48 inches. I pull 53ft dry vans. Local pete dealership says that the ride height on the bags should be 11 1/2 inches which it is right on. The car sits higher in the rear and it has the lowest pedastool for the fifth wheel. I don't want to switch to 22.5's because of the cost, I would rather swap out for low air leaf then to do that. I thought about adjusting the ride height a little lower like maybe an inch lower, but the adjustment is already maxed to the lowest setting, the height valve has two bolts, the one at the top then the one at the bottom which has a slotted hole to the left and right and it is already slid all the way to the right which would be the lowest setting. I will probably make up a new rod that connects it to the rear. I guess this whole height thing isn't really a problem but I would feel better if I knew it was a little lower.

Answer:

Be careful. You are venturing into messing with your driveline angles. If they get too far out of whack, it will set up some pretty interesting vibrations and spectacualar failures in the driveline, tranny, clutch and rear ends.

Answer:

for some reason I never realized it but one of the reasons the car sits a little higher is because the original owner has 24.5 tall rubber on it, I know it isn't that much of a difference but it is enough to help once I wear out these tires and replace em with low pros. I had the ride height checked by a pete dealership and they say it is good. So whatever distance I can gain from switching to low pros then is all I will get out of it.

Answer:

JustinB is right on. I made the mistake of messing with my ride height, wound up with a weird "off-throttle" vibration; within 200 miles I dropped the intermediate driveshaft (between the front diff and carrier bearing) onto the pavement! Spectacular as well as dreadfull (at least to me bank account).
After a tow and new driveshaft installed, I had the mechanic replace the air-bag valve that controls the ride height and re-set the correct height.

Answer:

When you switch over to the Lo-Pros....don't forget to have them recalibrate your speedometer.
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