KM+ Knowledge Base
Automatic Transmission
Shudder, slipping, delayed engagement, jerking, hydraulic pressure loss, seals and clutch behaviour – what the symptom means, what may be causing it, what to check first, and when workshop diagnosis is needed.
Articles and guides
Each topic follows the same logic: symptom → likely mechanism → what to check → appropriate solution → when workshop diagnosis is needed.
Transmission Shudder: Friction Problem or Hydraulic Pressure Loss?
Shudder is often treated as a friction problem, but an ageing transmission may also shudder because hardened seals cannot maintain clutch apply pressure. This article explains both mechanisms with three visual scenarios.
Read the full articleAutomatic transmission not engaging when cold
Delay into Drive or Reverse: causes, a simple self-check and the fix.
Read guide →Why does my automatic gearbox jerk when cold?
Cold-start jerking and harsh shifts explained.
Read article →CVT Shudder or Judder: Causes and Fixes
How to distinguish fluid/friction issues from pressure loss and mechanical wear.
Read article →Transmission Problems Checker
62 common AT, CVT and DSG problems with the likely cause and what to check first.
Open the checker →Automatic Transmission Jerking, Slipping or Slow to Engage?
Product hub, use instructions, real cases and proof.
Open product page →KM+ Knowledge Base · Educational content does not replace diagnosis for severe mechanical or electrical faults.