<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 ArticleAudit a complete engine assembly supplier in China using fitment, BOM, unit-test, MOQ, freight, warranty, and RFQ evidence checks.
Read articleHonda 38810-RNA-014, Chevrolet 714978... A/C compressors are identified by OEM numbers that must match exactly. Learn how to read the plate and order the right unit the first time.
Read articleA 4.10, 4.56 or 3.73 ratio changes acceleration, top speed and fuel economy. Learn how differential ratios work and how to read crown and pinion markings before you buy.
Read articleBrowse our full range of engines, gearboxes, and transmission components — engineered for performance, built for reliability.
