2DX, 2CX, 3CX, 4CX
Telescopic Handlers, Wheeled Loaders, Forklifts
A synchronizer is a precision mechanism in the gearbox that matches the rotational speeds of shafts and gears, allowing for smooth and quiet gear changes. If you hear loud grinding when shifting, gears are hard to engage, or they pop out while driving, these are classic symptoms of worn synchronizer rings. Ignoring the problem leads to damage to the gears and selector sleeves, resulting in a costly overhaul of the entire gearbox.
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Effective Synchronization
Smooth and quiet gear shifting
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High Durability
Long life in harsh conditions
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Perfect Fit
Guaranteed hassle-free installation
The accuracy and quality of materials guarantee long and trouble-free use without the need for frequent replacement.
The synchronizer is fully adapted to work with original shafts and gears, ensuring a consistent repair.
The GX-AFTER brand is a proven and safe alternative that offers quality comparable to original parts at a much better price.
A gearbox overhaul is the perfect time to replace all bearings and seals. Installing new parts with old bearings is uneconomical.
Before installation, thoroughly check the condition of the selector forks, shafts, and gears. A worn fork can be the cause of synchronizer failure.
A gearbox overhaul requires specialized tools (presses, pullers) and extensive knowledge. We recommend entrusting this repair to a qualified mechanic.
After the repair, fill the gearbox with fresh, dedicated oil, such as HYPTRON, and install a new oil filter (e.g., from REDX).
Answer: Yes, this is the main symptom of worn friction rings in the synchronizer, which are no longer able to slow down the gears before engagement.
Question: Can I replace just the bronze ring?Answer: It is highly not recommended. The synchronizer is a precision mechanism. All its components wear out. Replacing the complete synchronizer assembly is the only reliable and durable solution.
Question: What is the main cause of synchronizer failure?Answer: The most common causes are contaminated or old oil (due to a clogged filter), low oil level, or aggressive gear shifting by the operator.
If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.
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Application: JCB 2DX, 2CX, 3CX, 4CX, Telehandlers, Front loaders, Forklifts

















