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- Wed Oct 14, 2009 7:35 am
- Forum: Engine, Clutch and Transmission
- Topic: 406 Auto gearbox problem
- Replies: 2
- Views: 412
406 Auto gearbox problem
Hi guys How do I know which gearbox (AL4 or 4HP20)is fitted on my 406 (1999 406ST, before facelifted version)? It always jerk (after 100,000km) when changing from 1st to 2nd or 3rd to 2nd gear, does it help if changing the gearbox oil and update the gearbox firmware (it’s now 150,000km on the clock ...