deckerp
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Just got the wheels and tires mounted up today. Still have a bit more bashing to do up front, but otherwise my experiments in compression have shown rubbing only when turned all the way and stuffed 4" SJR lift, 235/75/R15 on 4 lug Diamond Racing Wheels (~59bucks a piece) (The thing on top is a lumber rack for work)
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Well... to conclude my highjacked thread, I figured it out. The angle on the middle u-joint of the drive axle had become too sharp (lowering transmission, lowering diff, while not lowering mid section). I spaced down that mid joint bracket and the noise stopped. Perhaps this is a problem I encountered only because my u-joint was already getting beat and the extra angle just exacerbated a pre-existing weakness. It might be a good idea though to space this bit down along with everything else for every 4" lift.
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My only thought was that perhaps something in the drivetrain is spinning outward and rubbing on something. This would fit my observations since when the gas is applied the force would keep the drivetrain centered, and at low speeds the centrical force would not be enough to spin the part out far enough to rub. However I cannot find any evidence of rubbing under the car, e.g. clean or warn marks. Further nothing feels excessively loose. Might this be related to my removal of the rear crossmember? My only other thought is that perhaps it's something within the transmission? I'm seriously stumped.
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Also, i have an odd noise now. it's a sort of grinding/vibration noise coming from the transmission area (I think) but it's only audible over 45 mph and only when you take your foot off the accelerator. If the gas is on no noise. What do you think?
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I just put my 4" sjr lift in yesterday. (Thanks Scott!) I ran into one thing that I hadn't heard about. The rear transmission crossmember was holding me up too high to get the block under the leading rod bracket so i removed that, but when I got all the blocks in and everything else bolted up, the transmission/ center drive axle were too low to put the rear crossmember back on. Is this abnormal? The cross member does not actually attach to the transmission. Is it's purpose to stiffen the car?
