#gearbox
7 posts in Car Diagnostics blog about "gearbox" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Automatic gearbox slipping: what to check before a rebuild quote
Revs rise, speed does not. Before accepting a four-figure quote, three checks separate a fluid problem from a worn clutch pack — and they are all cheap.
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The car will not move in Drive: gearbox, fluid, or limp mode
Selector in D, engine running, car stationary. The causes from fluid level to limp mode, and what to check first.
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Reverse will not engage: manual gearboxes and what goes wrong
On most manuals reverse has no synchroniser — which is exactly why it crunches. The causes and what to fix.
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Automatic or manual: cost of ownership without the ideology
The question is decided by the specific design and your route, not by the gearbox type. The automatic types and what each costs to run.
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Engine braking: economy, component life, and the limits of the technique
Engine braking saves fuel and brakes but does not replace them. How it works and where its usefulness ends.
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Shuddering at low speed: adaptations, clutch, or engine mounts
Jerkiness in traffic on a dual-clutch gearbox more often means lost adaptations than wear. The causes and the order of checks.
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Torque Converter Diagnostics via OBD-II: P0741, TCC Slip, Live Data
How to diagnose automatic transmission torque converter through OBD-II: P0741 TCC lockup slip, P0740 solenoid, Live Data slip percentage — step-by-step without disassembly.