{"product_id":"velvet-drive-c80-074-damper-plate-1004-650-003","title":"Velvet Drive C80-074 Damper Plate | 7.98 in., 8-Hole, 26-Spline | 1004-650-003","description":"\u003ch2\u003eVelvet Drive C80-074 Flywheel-to-Transmission Damper Plate\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e C80-074  |  \u003cstrong\u003eVelvet Drive Part Number:\u003c\/strong\u003e 1004-650-003  |  \u003cstrong\u003eBrand:\u003c\/strong\u003e Borg Warner \/ Velvet Drive\u003c\/p\u003e\n\u003cp\u003eBorg Warner \/ Velvet Drive \u003cstrong\u003eC80-074\u003c\/strong\u003e (1004-650-003) is a spring-damped flywheel-to-transmission drive plate designed to absorb torsional vibration between the engine flywheel and marine transmission input shaft. The spring-damped center section smooths drivetrain pulses and reduces shock loading on the transmission input components during engagement and load changes.\u003c\/p\u003e\n\u003cp\u003eThe C80-074 measures \u003cstrong\u003e7.98 in. (202.7 mm) outside diameter\u003c\/strong\u003e, uses an \u003cstrong\u003e8-hole flywheel bolt pattern\u003c\/strong\u003e, and has a \u003cstrong\u003e26-tooth input spline\u003c\/strong\u003e. These three dimensions must all match the installation — Velvet Drive offers several visually similar damper plates with different diameters, bolt patterns, and spline counts that are not interchangeable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote on part number conflicts:\u003c\/strong\u003e Some online catalog sources associate \u003cstrong\u003e1004650003\u003c\/strong\u003e with a larger 10.25 in. Detroit Diesel plate. The C80-074 reference specifically identifies the \u003cstrong\u003e7.98 in., 8-hole, 26-spline\u003c\/strong\u003e configuration documented here. Match by the C80-074 damper number and the physical dimensions above, not by the normalized 10-digit number alone.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Number:\u003c\/strong\u003e C80-074\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVelvet Drive Part Number:\u003c\/strong\u003e 1004-650-003 \/ 1004650003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Borg Warner \/ Velvet Drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Flywheel-to-Transmission Torsional Damper Plate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 7.98 in. (202.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Pattern:\u003c\/strong\u003e 8 equally spaced holes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hole Diameter:\u003c\/strong\u003e approx. 0.34 in. (8.6 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Bolt Circle:\u003c\/strong\u003e approx. 7.12–7.13 in. (180.8–181.1 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Spline Count:\u003c\/strong\u003e 26 teeth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Diameter:\u003c\/strong\u003e approx. 1.35 in. (34.3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Torque:\u003c\/strong\u003e approx. 350 lb-ft (475 N·m)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Flywheel \/ marine transmission drivetrain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e approx. 2.5 kg \/ 5.5 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003eFitment is determined by the flywheel bolt pattern, plate diameter, and transmission input spline — not by transmission model or engine brand alone. Documented applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePerkins 6.354 marine diesel engines with compatible Velvet Drive transmissions\u003c\/li\u003e\n\u003cli\u003eSelected GM-based marine engines with compatible Borg Warner \/ Velvet Drive transmission installations\u003c\/li\u003e\n\u003cli\u003eCompatible Hurth marine transmission installations using the same spline and flywheel dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm all three critical dimensions before ordering: \u003cstrong\u003e7.98 in. OD, 8-hole bolt pattern, and 26-tooth spline\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eFitment Notice\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, verify all of the following for your installation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOutside diameter is \u003cstrong\u003e7.98 in. (202.7 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlywheel mounting pattern uses \u003cstrong\u003e8 equally spaced holes\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBolt circle is approximately \u003cstrong\u003e7.12 in. (181 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTransmission input spline is \u003cstrong\u003e26 teeth\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpline diameter is approximately \u003cstrong\u003e1.35 in. (34.3 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eExisting part cross-references \u003cstrong\u003eC80-074 \/ 1004-650-003 \/ 1004650003\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSeveral Velvet Drive damper plates share a similar appearance but differ in diameter, hole count, and spline. Matching all physical dimensions is essential — a plate that bolts to the flywheel but has the wrong spline pitch or offset will not function correctly and can damage the transmission.\u003c\/p\u003e\n\n\u003ch2\u003eWhen to Replace the Damper Plate\u003c\/h2\u003e\n\u003cp\u003eReplace the damper plate when any of the following are found:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDamper springs are broken, loose, or have fallen out\u003c\/li\u003e\n\u003cli\u003eExcessive rotational play is present at the spring hub\u003c\/li\u003e\n\u003cli\u003eRattling or knocking is heard between the engine and transmission at idle or on gear engagement\u003c\/li\u003e\n\u003cli\u003eThe center spline is visibly worn or damaged\u003c\/li\u003e\n\u003cli\u003eThe plate is cracked, distorted, or shows signs of heat damage\u003c\/li\u003e\n\u003cli\u003eDrivetrain vibration has increased at all speeds\u003c\/li\u003e\n\u003cli\u003eTransmission removal exposes significant deterioration or spring loss\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn or broken damper plate allows unfiltered torsional shock to reach the transmission input shaft and can accelerate wear on internal transmission components.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the flywheel face, mounting hardware, transmission input spline, and bellhousing alignment before installing the new plate\u003c\/li\u003e\n\u003cli\u003eInstall the plate in the correct orientation per the transmission or engine manufacturer’s procedure\u003c\/li\u003e\n\u003cli\u003eUse the engine manufacturer’s specified flywheel fasteners and torque values — do not substitute hardware\u003c\/li\u003e\n\u003cli\u003eEnsure the 26-spline hub engages the transmission input shaft freely — do not force the transmission into position using the bellhousing bolts\u003c\/li\u003e\n\u003cli\u003eAfter assembly, rotate the engine and transmission by hand to verify free rotation and no abnormal contact\u003c\/li\u003e\n\u003cli\u003eCheck for any drivetrain noise or vibration after the initial test run and re-inspect all fastener torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBorg Warner \/ Velvet Drive:\u003c\/strong\u003e C80-074 \/ 1004-650-003 \/ 1004650003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlto:\u003c\/strong\u003e DA-103 (replacement cross-reference)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131362684964\"\u003eVelvet Drive 13.25\" Damper Plate 1004-650-007 | GM 454 \/ Ford Lehman\u003c\/a\u003e — larger Velvet Drive damper plate for high-torque applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131363471396\"\u003eCrusader Damper Plate 302\/351 | SAE #0 \/ BorgWarner | OEM Part R140001\u003c\/a\u003e — related damper plate for Crusader \/ BorgWarner applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131362390052\"\u003eBorg Warner Velvet Drive Input Shaft – 71C \/ 72VDR Series | 71C-3A16\u003c\/a\u003e — transmission input shaft for 71C \/ 72VDR series\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131362521124\"\u003eVelvet Drive 71C \/ 72C Gasket \u0026amp; Oil Seal Kit A4867HA\u003c\/a\u003e — transmission service kit for 71C \/ 72C applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8126849712164\"\u003eVelvet Drive Neutral Safety Switch Update Kit 1004-420-052 | Borg Warner 71C \/ 72C\u003c\/a\u003e — related 71C \/ 72C transmission component\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8126842568740\"\u003eVelvet Drive Neutral Safety Switch 1000-640-004 | Borg Warner 71C \/ 72C Transmission\u003c\/a\u003e — neutral safety switch for 71C \/ 72C transmissions\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/8131362422820\"\u003eBorg Warner Velvet Drive Oil Pump – 71C \/ 72C Series | 71C-A60\u003c\/a\u003e — oil pump for 71C \/ 72C transmissions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e C80-074 is typically needed when a Perkins 6.354 diesel or compatible GM-based engine installation with a Velvet Drive transmission shows drivetrain rattle, clunking on gear engagement, or increased vibration that points to the flywheel coupling rather than the engine mounts or transmission itself. It’s also the correct service part when the transmission is being removed for rebuild or replacement and the damper plate shows spring wear or loss — replacing it at that point costs far less than a return visit if the damper fails shortly after the transmission is reinstalled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issues:\u003c\/strong\u003e The most frequent ordering mistake is selecting by diameter alone. C80-074 is a \u003cstrong\u003e7.98 in. plate with 26 splines\u003c\/strong\u003e. Velvet Drive also makes an 8-hole plate in a larger diameter for different applications, and the spline counts differ between models. Confirm all three dimensions — diameter, hole count, and spline — from the original plate or the engine’s parts diagram before ordering. Also be aware that the 10-digit normalized number 1004650003 has been associated with more than one plate in third-party catalogs; the C80-074 designation is the reliable identifier for the 7.98 in. configuration.\u003c\/p\u003e","brand":"BOR","offers":[{"title":"Default Title","offer_id":43553406779428,"sku":"1004-650-003","price":980.64,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/OEMBorgWarnerDamperPlateC80-074.png?v=1770838119","url":"https:\/\/marisolmarine.com\/products\/velvet-drive-c80-074-damper-plate-1004-650-003","provider":"Marisol Marine Company","version":"1.0","type":"link"}