BMW Rear Differential Input Flange 34T / 37T 81mm – Fix Clunk & Play

BMW Rear Differential Input Flange – 34T or 37T – 81 mm Rear differential input flange for selected BMW rear differential applications. This flange connects the prop shaft to the rear differential and is available in two internal spline variants: 34 teeth / 81 mm and 37 teeth / 81 mm. Designed for repair of worn spline engagement, driveline play, vibration, backlash, clunking on load change, or damaged rear differential input flange interfaces. Important: These are rear differential flanges, not transfer case flanges. This product has 2 variants: 34T / 81 mm and 37T / 81 mm. Please verify your original flange by spline count. Available Variants 34 Teeth / 81 mm 37 Teeth / 81 mm Although both variants look very similar externally, they are not interchangeable. Features Rear differential input flange for BMW prop shaft connection Available in 34-spline and 37-spline versions 81 mm 3-bolt triangular flange pattern Helps restore tight spline engagement at the rear differential input Ideal for worn, loose, noisy, or damaged rear diff flange assemblies Suitable for rebuilds, preventive service, or driveline backlash repair Common Symptoms of a Worn Differential Input Flange Clunk when taking off or lifting throttle Driveline vibration under load Noticeable play between propshaft and differential input Worn or damaged splines on the original flange Knocking noise from the rear differential / propshaft area Fitment Confirmed 34T / 81 mm application: BMW 5 Series F10 BMW 5 Series F10 LCI BMW 5 Series Touring F11 BMW 5 Series Touring F11 LCI Known OE reference commonly linked to the 34T version: 26107633480 Broader BMW families where 34T / 37T rear diff input flanges may be found and must be verified: 1 Series 2 Series 3 Series 5 Series 6 Series 7 Series X3 X4 X5 X6 BMW used both 34-spline and 37-spline versions across later rear differential applications, so fitment must be verified on the actual flange or by VIN. How to Choose the Correct Variant Select 34 Teeth / 81 mm if your original flange has 34 internal splines Select 37 Teeth / 81 mm if your original flange has 37 internal splines Confirm the flange uses the 81 mm 3-bolt triangular prop shaft pattern The safest method is to remove the original flange and count the splines before ordering. Why Replace the Flange? The rear differential input flange is the critical link between the prop shaft and the rear differential pinion shaft. Over time, spline wear and driveline shock can create backlash, clunking, and vibration. Replacing a worn flange can restore proper driveline engagement and help prevent additional wear to the mating components. Package Includes 1 x rear differential input flange Variant selected by customer: 34 Teeth / 81 mm 37 Teeth / 81 mm Notes For selected BMW rear differential applications only Not all visually similar flanges are interchangeable Professional installation is recommended Please compare your original part with the photos and dimensions before purchase