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As driveshaft angle rises, wear rates increase. So expect shorter U-joint life whenever driveshaft angle is steeper, and check and lube the joints more often. If a driveshaft is too long and bottoms out at full suspension compression, you’re asking for trouble at the transfer case or axle pinion. When making suspension mods consider how the axle moves as it cycles and check your driveshaft compression/extension limits.