ME503075 Synchronizer Ring Transmission Gear for Mitsubishi Fuso

Confirm ME503075 on your original synchronizer ring before ordering. This ring fits specific Mitsubishi Fuso manual transmissions only. Verify transmission model, gear position, and ring orientation. A reversed ring prevents gear engagement entirely. Professional installation recommended.

The ME503075 synchronizer ring is a replacement friction component for Mitsubishi Fuso truck gearboxes. This ring sits between the gear cone and synchronizer hub, equalizing shaft speeds before tooth engagement. Constructed from bronze alloy with a machined inner taper. The friction surface contains spiral oil grooves for rapid fluid evacuation. Fits select M035, M038, and M042 transmissions behind 4D30, 4D31, and 4D32 engines. Worn rings cause grinding during shifts. Replacement restores smooth gear change for the specific position this ring serves.

Installation Notes: Clean the gear cone with brake cleaner before fitting the new ring. Do not use sandpaper on the cone surface. Test the ring by pressing onto the cone and twisting. No rotation indicates proper fit. Gap between ring face and gear teeth should measure 0.4mm to 0.8mm. Use GL-4 gear oil only. GL-5 damages bronze rings.

Q1: Which transmissions use ME503075?
A1: This ring fits M035, M038, and M042 series transmissions in Fuso Canter and Rosa buses from the 1980s and 1990s.

Q2: Is this a steel or bronze ring?
A2: Bronze. A magnet will not stick to this ring. Do not substitute with steel rings.

Q3: How to test the old ring for wear?
A3: Press the ring onto the gear cone and twist. If it spins freely, the ring is worn and requires replacement.

Q4: What oil is safe for this ring?
A4: GL-4 80W-90 or 75W-85. GL-5 oil corrodes bronze and destroys the ring within months.

Q5: Return policy for mismatch?
A5: Returns accepted within 30 days for unused rings in original packaging. Provide transmission model and photos of your original ring. No returns after installation.