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Read articles →This is a narrow, problem-specific fix rather than a general repair walkthrough: an owner replacing the main drive shaft U-joint on a John Deere 2210 with a NAPA UJ410 (chosen for its grease zerk), then troubleshooting a bad rattle on deceleration caused by the zerk fitting hitting the frame plate. It shows the actual fix, cutting a relief notch with a sawzall, learned through repeated trial and error. Most useful for someone already mid-repair on this exact U-joint swap.
Posted by the Aaron Casamassa channel, an owner sharing a hands-on fix learned through their own trial and error.
The grease zerk fitting on the UJ410 U-joint was hitting a frame plate when the shaft deflected under load and then unloaded, causing a rattle.
Cut a relief notch out of the frame plate where the zerk fitting contacts it, using a sawzall, or a grinder if done before reinstalling the driveshaft.
Yes, the transcript notes some play in the spline shaft is somewhat common, and heavy grease was added there during reassembly.
