Symptoms
Harsh, jerky or delayed shifts.
The fix, step by step
- Note the gear, temperature, drive mode and load when it happens.
- A Mercedes XENTRY session can reset and relearn the transmission adaptations; rule out the transfer case before condemning the gearbox.
Tools & part numbers
- XENTRY-capable diagnostic tool
- notes or video of the symptom
Where to buy the parts
Liqui Moly Top Tec ATF 1950, MB 236.17 (yellow)FCP Euro ↗Amazon ↗
Genuine Mercedes 9G-TRONIC oil pan with filter 725 270 31 14 (listed for 2019–2021 G 63)FCP Euro ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G-Class (second generation) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.