{"product_id":"tcc-apply-valve-kit-pwm-units-only","title":"TCC Apply Valve Kit - PWM Units Only","description":"\n\u003ch2 class=\"light\"\u003e\u003cstrong\u003eFits PWM units only.\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eVehicles with GM 4L60-E, 4L65-E and 4L70-E transmissions have numerous converter overheat lockup complaints. These include no lockup or lockup immediately after 2nd Gear when fluid warms up, caused by valve bore wear. Frequently, the solenoid will have no control over the valve's position. Often converter feed oil will leak past the OE spool, which, added together with orificed signal oil will be more than the solenoid can exhaust. This may completely stroke the valve into the lockup position and create a \"no power\" or \"no brake cancel\" condition. Oil cross-leaks may float the valve into a mid-way position and restrict cooler flow, which burns up the converter. Sonnax TCC apply valve kit 77805E-K will eliminate the bore cross-leakage. This precision valve has a PTFE seal to prevent the cross-leaking of converter signal and converter feed oil.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eUpdated stroke pressure eliminates TCC drift on apply and updated exhaust control\u003c\/li\u003e\n\u003cli\u003ePTFE seal eliminates cross-leaking of converter signal oil and converter feed oil\u003c\/li\u003e\n\u003cli\u003eWorks in both early- and late-style PWM pumps when used with included spring\u003c\/li\u003e\n\u003cli\u003eDrop-in Zip Valve™ parts install quickly and easily\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003clabel for=\"components-panel\"\u003eContents:\u003c\/label\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eValve \u003cem\u003eAluminum\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeal \u003cem\u003ePTFE\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"break-out-grey\"\u003e\n\u003cdiv class=\"wrap scc\"\u003e\n\u003cdiv class=\"col-4\"\u003e\n\u003cp\u003e\u003cstrong\u003eSymptoms:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo lockup\u003c\/li\u003e\n\u003cli\u003eCode 894, 1870\u003c\/li\u003e\n\u003cli\u003eFalls out of lockup when hot\u003c\/li\u003e\n\u003cli\u003eFluid blown out fill tube\u003c\/li\u003e\n\u003cli\u003eLockup immediately after 2nd gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"col-4\"\u003e\n\u003cp\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e\u003c\/p\u003e\nExcess pump bore-to-valve clearance allows TCC signal oil to leak past the spool, preventing lockup or causing lockup to disengage when hot. Additionally, converter feed can leak past the excessive clearance, combine with signal oil and cause premature lockup.\u003c\/div\u003e\n\u003cdiv class=\"col-4\"\u003e \u003c\/div\u003e\n\u003cdiv class=\"col-4 last\"\u003e\n\u003cp\u003e\u003cstrong\u003eCorrection:\u003c\/strong\u003e\u003c\/p\u003e\nSonnax improved drop-in TCC apply valve kit with PTFE seal will eliminate bore cross-leakage.\u003c\/div\u003e\n\u003cdiv class=\"col-4 last\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"break-out-accent break-out-accent-link\"\u003e\n\u003cdiv class=\"wrap\"\u003e\n\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis part only fits PWM units, and mismatching PWM and non-PWM valves will cause rapid converter failure.\u003c\/p\u003e\n\u003cbr\u003e\u003cstrong\u003eIdentifying PWM vs. Non-PWM Units:\u003c\/strong\u003e \u003c\/div\u003e\n\u003cdiv class=\"wrap\"\u003eIf the OE valve features one spool at the location indicated \u003cspan class=\"bx-pager\"\u003ehere\u003c\/span\u003e, you are working on a PWM unit. If the OE valve features double spools, you are working on a non-PWM unit and must use Sonnax TCC apply valve kit \u003ca href=\"..\/i-30503098-tcc-apply-valve-kit-non-pwm-units-only.html\"\u003e77805-K\u003c\/a\u003e. Do not rely on the OE valve material (steel vs. aluminum) to determine for whether the unit is PWM, as some early PWM pumps used steel TCC valves like the non-PWM pumps.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e \u003c!-- suncoast-documents:start --\u003e\u003cdiv class=\"suncoast-product-documents\"\u003e\n\u003ch3 class=\"h6\"\u003eDocuments\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/184186.pdf?v=1793635219\" target=\"_blank\" rel=\"noopener\"\u003eInstructions\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\u003c!-- suncoast-documents:end --\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":49129566306523,"sku":"77805E-K","price":37.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/F198655847.jpg?v=1786547041","url":"https:\/\/suncoastperformance.com\/products\/tcc-apply-valve-kit-pwm-units-only","provider":"SunCoast Diesel","version":"1.0","type":"link"}