KM+ Technical Knowledge
Understand the problem before you treat it.
Clear, practical explanations of transmission, CVT, engine, fuel and lubrication problems – what the symptom means, what may be causing it, what to check first, and when a KM+ solution may be relevant.
Browse by system
Each topic follows the same logic: symptom → likely mechanism → what to check → appropriate solution → when workshop diagnosis is needed.
Automatic Transmission
Shudder, slipping, delayed engagement, jerking, hydraulic pressure loss, seals and clutch behaviour.
Browse transmission articles →CVT
Judder, belt or chain behaviour, CVT fluid condition, hydraulic pressure and cold-start symptoms.
Read CVT shudder guide →Engine
Sludge, varnish, stuck rings, oil consumption, flushing, friction and seal ageing.
Read: what exhaust smoke colour means →Fuel & Combustion
Injector deposits, atomization, carbon buildup, diesel combustion, fuel efficiency and emissions.
See fuel & combustion articles →Lubrication Technology
Viscosity, friction modifiers, ester polarity, oxidation, antiwear chemistry and seal compatibility.
Articles coming next →Symptom Guides
Quick symptom-led articles that help motorists decide whether to treat, service, or inspect mechanically.
Open the Transmission Problems Checker →Featured knowledge
Start with the issues that most often lead owners to search for help.
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 articleCVT Shudder or Judder: Causes and Fixes
How to distinguish fluid/friction issues from pressure loss and mechanical wear.
Read article →Automatic Transmission Jerking, Slipping or Slow to Engage?
Product hub, symptom checker, use instructions, cases and proof.
Open product page →All articles by system
Every KM+ technical article in one place. New articles are added to the right system as they are published.
Transmission
Transmission shudder: friction problem or hydraulic pressure loss?
Automatic transmission not engaging when cold
Why does my automatic gearbox jerk when cold?
Transmission Problems Checker (62 symptoms)
All transmission articles →Fuel, Combustion & Engine
Why is my car using more petrol than before?
Rough idle or hesitation: dirty injectors or carbon build-up?
More transmission guides
Connected guides on the most common automatic transmission symptoms. New articles are added here as they are published.
Transmission not engaging when cold
Why Drive or Reverse can take seconds or minutes to engage, and why warming up can temporarily improve it.
Read guide →Why a transmission jerks during gear changes
Hydraulic pressure loss, solenoid control, worn clutches and how the symptoms differ.
High RPM but weak acceleration
What transmission slip means, why it generates heat, and when pressure loss is involved.
How hardened seals cause hydraulic pressure loss
A technical explainer connecting seal elasticity, internal leakage and clutch holding force.
Why transmission slip creates heat
A visual explanation of torque transfer, relative speed and heat generation during unwanted slip.
Friction modifier vs seal revitalization
Two different approaches to shudder, what each changes, and why root cause matters.
KM+ Knowledge Base · Technical education first, product relevance second. Educational content does not replace diagnosis for severe mechanical or electrical faults.