{"product_id":"gear-mainshaft-186842","title":"Gear Mainshaft for Discovery 1 (1989 – 1998) 28 Teeth (From TA178214) – FTC5087","description":"\u003cp\u003eThe gear mainshaft is a core rotating component within the LT77 or R380 manual gearbox, transmitting drive from the gear cluster to the output shaft. This specific mainshaft features a 28-tooth configuration and applies to Discovery 1 vehicles from chassis number TA178214 onward. Worn or damaged mainshaft teeth cause gear slippage, difficulty engaging gears, and abnormal transmission noise; fitting the correct tooth-count variant is critical to maintaining proper gear mesh and drive efficiency.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e28-tooth specification - must match existing gearbox internals to ensure correct gear mesh ratios\u003c\/li\u003e\n\u003cli\u003eApplicable from chassis number TA178214 onward, distinguishing it from earlier production variants\u003c\/li\u003e\n\u003cli\u003eSupplied as a direct OEM-specification replacement part under Land Rover part number FTC5087\u003c\/li\u003e\n\u003cli\u003eWhen replacing the mainshaft, inspect the layshaft, bearings, and synchro rings for wear, as these components typically require concurrent replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003cp\u003eThis part fits the Land Rover Discovery 1 (1989–1998) with manual gearbox, from chassis numbers TA178214 and TA509010 onward, across petrol and diesel powertrain variants.\u003c\/p\u003e\n\u003cp\u003eNot sure about fitment? Feel free to get in touch at \u003ca href=\"mailto:info@thomasperformance.co.uk\"\u003einfo@thomasperformance.co.uk\u003c\/a\u003e\u003c\/p\u003e","brand":"Allmakes PR2","offers":[{"title":"Default Title","offer_id":55820575310168,"sku":"FTC5087","price":104.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0890\/0070\/6392\/files\/FTC5087-600x600.jpg?v=1758865471","url":"https:\/\/thomasperformance.co.uk\/products\/gear-mainshaft-186842","provider":"Thomas Performance Ltd","version":"1.0","type":"link"}