{"product_id":"velvet-drive-71c-reduction-main-shaft-l4-2-1017-171-001","title":"Velvet Drive 71C Reduction Main Shaft AS2-L4-2 | 1017-171-001 | 10-Spline","description":"\u003ch2\u003eVelvet Drive 71C Reduction Main Shaft AS2-L4-2 | 1017-171-001\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e AS2-L4-2  \/  L4-2  \/  1017-171-001 (also shown as 1017171001)\u003c\/p\u003e\n\u003cp\u003eThe Velvet Drive AS2-L4-2 (OEM service reference 1017-171-001) is the reduction-unit main shaft used in compatible Velvet Drive 71C \/ 10-17 marine transmissions. It uses a \u003cstrong\u003e10-spline configuration\u003c\/strong\u003e and is the correct replacement when the original shaft is worn, damaged, or being replaced during a reduction-unit overhaul. Current Velvet Drive parts catalogs identify 1017-171-001 specifically as the “Main Shaft – Reduction Unit” in the 1017 \/ 71C transmission family.\u003c\/p\u003e\n\u003ch3\u003eCompatible Transmissions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVelvet Drive 71C — reduction-unit configurations\u003c\/li\u003e\n\u003cli\u003eBorg-Warner 10-17 \/ 1017 — reduction-unit configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVelvet Drive used different shafts across direct-drive and various reduction-gear configurations. Confirm the transmission identification tag, reduction ratio, and original shaft reference before ordering.\u003c\/p\u003e\n\u003ch3\u003eFitment Notice\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, verify all of the following from the transmission identification plate and original shaft:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission family: 71C \/ 10-17 \/ 1017\u003c\/li\u003e\n\u003cli\u003eReduction-unit configuration (not direct drive)\u003c\/li\u003e\n\u003cli\u003eOriginal shaft reference: \u003cstrong\u003eL4-2\u003c\/strong\u003e or OEM number \u003cstrong\u003e1017-171-001\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpline count: \u003cstrong\u003e10 splines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReduction ratio (to confirm correct variant)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis shaft is documented specifically for the \u003cstrong\u003e71C \/ 10-17 reduction family\u003c\/strong\u003e. Cross-application to 72C \/ 10-18 transmissions has not been confirmed from public Velvet Drive catalog sources and should be verified against your transmission tag and internal parts reference before ordering.\u003c\/p\u003e\n\u003ch3\u003eCross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eAS2-L4-2\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eL4-2\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1017-171-001\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1017171001\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace the Main Shaft\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSplines are visibly worn, rounded, or damaged\u003c\/li\u003e\n\u003cli\u003eShaft journals show scoring or pitting\u003c\/li\u003e\n\u003cli\u003eBearing surfaces are worn beyond service limits\u003c\/li\u003e\n\u003cli\u003eShaft runout exceeds transmission specifications\u003c\/li\u003e\n\u003cli\u003eGear or spline engagement has excessive play\u003c\/li\u003e\n\u003cli\u003eCorrosion or contamination has damaged the shaft surface\u003c\/li\u003e\n\u003cli\u003eReduction unit is undergoing major rebuild and inspection identifies shaft wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the transmission model number and reduction ratio from the identification plate before disassembly\u003c\/li\u003e\n\u003cli\u003eCompare the replacement shaft directly against the original — verify overall length, spline count, and journal dimensions before installation\u003c\/li\u003e\n\u003cli\u003eInspect all 10 splines for proper mating engagement with the associated gear\u003c\/li\u003e\n\u003cli\u003eInspect associated bearings, bushings, thrust washers, and retainers and replace any worn components\u003c\/li\u003e\n\u003cli\u003eLubricate journals and bearing surfaces during assembly per Velvet Drive service procedures\u003c\/li\u003e\n\u003cli\u003eVerify shaft end play and transmission clearances during reassembly\u003c\/li\u003e\n\u003cli\u003eReplace any seals and gaskets disturbed during disassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131362619428\"\u003eVelvet Drive 71C \/ 72C Reduction Case Bearing B308AGS | 1000-130-018\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131362521124\"\u003eVelvet Drive 71C \/ 72C Gasket \u0026amp; Oil Seal Kit A4867HA\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131361865764\"\u003eVelvet Drive Needle Bearing — 4840D\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131361898532\"\u003eVelvet Drive Double Ball Bearing — 71 Series | 4920A\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131362390052\"\u003eVelvet Drive Input Shaft — 71C \/ 72VDR Series | 71C-3A16\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131362553892\"\u003eVelvet Drive 71C Forward Piston Housing Bearing B107A | 10-17 \/ 1017\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131370876964\"\u003eVelvet Drive 5-Inch Output Coupling A4547HA | 10-Tooth Coarse Spline\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe AS2-L4-2 \/ 1017-171-001 main shaft comes up during reduction-unit rebuilds on 71C \/ 10-17 transmissions where shaft wear or damage is found on inspection. It is one of the higher-cost internal components and is typically replaced only when inspection confirms it is beyond serviceable limits — most reduction-unit overhauls address bearings, seals, and gaskets before a shaft replacement becomes necessary.\u003c\/p\u003e\n\u003cp\u003eThe most important step before ordering is confirming both the transmission model number \u003cem\u003eand\u003c\/em\u003e the original shaft number from the identification plate and disassembled unit. The old catalog title “71\/72VD” has led to interchange errors — this shaft is documented specifically for the 71C \/ 10-17 reduction family. Do not assume it fits a 72C \/ 10-18 without verifying against the transmission tag. Also compare the replacement shaft physically against the original before installation, as Velvet Drive used different shaft lengths and journal configurations across reduction ratios.\u003c\/p\u003e\n\u003cp\u003e*not exactly as shown\u003c\/p\u003e","brand":"BOR","offers":[{"title":"Default Title","offer_id":43563780046884,"sku":"L4-2","price":350.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/240b2d16-6be9-4adc-8065-25aa838772fc.png?v=1788812939","url":"https:\/\/marisolmarine.com\/products\/velvet-drive-71c-reduction-main-shaft-l4-2-1017-171-001","provider":"Marisol Marine Company","version":"1.0","type":"link"}