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Read articles →This is part 4 of an owner's series recovering a stolen John Deere 4300 with a 12/12 SyncReverser transmission, focused narrowly on freeing up a stiff shift linkage. The creator shows the exposed shifter ball-and-sleeve mechanism up close, then demonstrates a hands-on fix: hosing it with WD-40, wiping it down, and re-lubricating with 30-weight oil while cycling through gears. Useful for owners troubleshooting stiff shifting on this transmission, not a general tractor review.
Posted by the mars1952 channel, an owner working hands-on through a multi-part repair/recovery project on their own stolen-and-recovered tractor.
Hose the ball and sleeve mechanism with WD-40 first to loosen it, wipe it down, then apply 30-weight oil while cycling through the gears to work it in.
No, the owner's manual does not mention lubricating this linkage at all, but the owner found it needs periodic lubrication to shift smoothly.
WD-40 is not a true lubricant. It works well for loosening stiff parts initially but leaves a gummy residue once its volatile parts evaporate after a day or so.
The 4200, 4300, 4400, possibly the 4500, and others like the 4045 and 1044, according to the owner.
