<p>Buying guides for differentials, A/C compressors and other powertrain parts: how to read OEM numbers, ratios and specs before you order.</p>
A 4x2 gearbox drives one rear axle via one propeller shaft; a 4x4 unit must connect a transfer case and carry a front output. Why the two differ and how to order the correct Hiace gearbox.
Read ArticleRead a Japanese truck axle tag correctly: what 9:41 means, the tooth math, fallbacks for a missing tag, and the checks that prove fitment before you order.
Read articleSynchronizer ring, cone and sliding sleeve explained: the role of each part in one shift, the wear points found at teardown, and what a synchronizer parts enquiry must carry.
Read articleSQRE4T15C vs 4F25TC1 compared: displacement, identification path, electronic configuration checks and assembly scope for two TOSEN engine assemblies, with the details every enquiry must carry.
Read articleAudi Multitronic 01J and 0AW are two CVT generations with non-interchangeable control modules. This guide compares both families and shows how to match the correct controller before ordering.
Read articleHow remanufactured and new gearboxes differ on process, testing, warranty and price, the six fitment checks that decide interchange, and when to choose each.
Read articleHow the Mitsubishi Fuso PS100 and PS120 rear differential assemblies are selected: axle identification, the 6×40 gear combination, enquiry details and fleet ordering practice for both truck lines.
Read articleA VIN decodes the vehicle, not the exact gearbox fitted to it. This guide shows which identifiers complete the check — the stamped transmission code, the OE part number and the variant fields that decide interchange — and the exact fitment packet to send a supplier for a written fitment confirmation before you pay.
Read articleThe 7×41 and 8×43 tooth combinations are the two Isuzu NPR final-drive specifications, calculating to approximately 5.857:1 and 5.375:1. This guide compares the two ratios and lists the details an enquiry needs.
Read articleBudget a fleet gearbox replacement in full: unit scope, fluids, programming, core deposit, freight, downtime, fitment checks, and a per-vehicle cost sheet.
Read articleBrowse our full range of engines, gearboxes, and transmission components — engineered for performance, built for reliability.
