{"product_id":"th400-4wd-performance-transmission-short-output","title":"TH400 4WD Performance Transmission – Short Output","description":"\u003cp\u003eThe \u003cstrong\u003eTH400 4WD Performance Transmission\u003c\/strong\u003e is a heavy-duty automatic transmission built for rock crawlers, rock bouncers, trail rigs, competition vehicles, and custom 4x4 applications that need the strength and simplicity of the GM Turbo 400 platform. Each transmission starts with a factory Chevrolet TH400 case that is thoroughly inspected and cleaned before assembly, then rebuilt with performance internal components for off-road use.\u003c\/p\u003e\n\u003cp\u003eThis transmission uses a manual valve body and can be configured with either a forward-pattern or reverse-pattern valve body, with the additional option of compression braking or no compression braking. Internal upgrades include a 34-element intermediate sprag, high-friction clutch materials, a Kevlar grooved rear band, and upgraded .060\" forward steels. A torque converter is \u003cstrong\u003enot included\u003c\/strong\u003e, allowing the converter to be chosen separately based on engine combination, vehicle weight, tire size, gearing, and intended use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Build Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFactory Chevrolet TH400 Case – Inspected and Cleaned\u003c\/li\u003e\n\u003cli\u003eTH400 4WD Short-Output Configuration\u003c\/li\u003e\n\u003cli\u003eManual Valve Body\u003c\/li\u003e\n\u003cli\u003eChoice of Forward or Reverse Shift Pattern\u003c\/li\u003e\n\u003cli\u003eChoice of Compression Braking or No Compression Braking\u003c\/li\u003e\n\u003cli\u003e34-Element Intermediate Sprag\u003c\/li\u003e\n\u003cli\u003eHigh-Friction Clutch Package\u003c\/li\u003e\n\u003cli\u003eKevlar Grooved Rear Band\u003c\/li\u003e\n\u003cli\u003e.060\" Forward Steels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTorque Converter:\u003c\/strong\u003e Not included.\u003c\/p\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eSpecifications \u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission\u003c\/td\u003e\n\u003ctd\u003eGM TH400 \/ Turbo 400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Type\u003c\/td\u003e\n\u003ctd\u003e3-Speed Automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase\u003c\/td\u003e\n\u003ctd\u003eFactory Chevrolet TH400 Case, Inspected and Cleaned\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e4WD \/ Off-Road\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Configuration\u003c\/td\u003e\n\u003ctd\u003eShort 4WD Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Body Type\u003c\/td\u003e\n\u003ctd\u003eManual Valve Body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShift Pattern Options\u003c\/td\u003e\n\u003ctd\u003eForward Pattern or Reverse Pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Braking Options\u003c\/td\u003e\n\u003ctd\u003eWith Compression Braking or Without Compression Braking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntermediate Sprag\u003c\/td\u003e\n\u003ctd\u003e34-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClutch Package\u003c\/td\u003e\n\u003ctd\u003eHigh-Friction Performance Clutches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Band\u003c\/td\u003e\n\u003ctd\u003eKevlar Grooved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Steels\u003c\/td\u003e\n\u003ctd\u003e.060\" Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVacuum Modulator\u003c\/td\u003e\n\u003ctd\u003eNot Used with Manual Valve Body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque Converter\u003c\/td\u003e\n\u003ctd\u003eNot Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cstrong\u003eFitment \u003c\/strong\u003e\u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ctable class=\"custom-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRock Crawlers\u003c\/td\u003e\n\u003ctd\u003eLow-speed technical terrain and high-load drivetrain use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRock Bouncers\u003c\/td\u003e\n\u003ctd\u003eHigh-horsepower, high-impact off-road applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrail Rigs\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty custom 4WD drivetrains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompetition Vehicles\u003c\/td\u003e\n\u003ctd\u003eManual-shift off-road and race applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCustom Tube Chassis\u003c\/td\u003e\n\u003ctd\u003ePurpose-built drivetrain installations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCustom Jeep \/ 4x4 Builds\u003c\/td\u003e\n\u003ctd\u003eTH400-based drivetrain conversions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for custom 4WD applications using a GM TH400 transmission.\u003c\/li\u003e\n\u003cli\u003eShort-output configuration is intended for transfer-case applications.\u003c\/li\u003e\n\u003cli\u003eChoose the valve body shift pattern that matches your preferred shifter operation: forward pattern or reverse pattern.\u003c\/li\u003e\n\u003cli\u003eChoose compression braking based on how you want the transmission to behave during deceleration and downhill operation.\u003c\/li\u003e\n\u003cli\u003eThis transmission does not use a vacuum-operated modulator because it is equipped with a manual valve body.\u003c\/li\u003e\n\u003cli\u003eTorque converter is not included and must be selected separately for the engine, vehicle weight, tire size, axle gearing, and intended use.\u003c\/li\u003e\n\u003cli\u003eTransfer case, transfer-case adapter, shifter, cooler, lines, flexplate, driveshafts, and installation hardware are not included unless specifically stated.\u003c\/li\u003e\n\u003cli\u003eVerify engine bellhousing compatibility and complete drivetrain configuration before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails class=\"details\"\u003e\n\u003csummary\u003e\u003cb\u003eFAQ\u003c\/b\u003e \u003cspan class=\"svg-wrapper icon-plus\"\u003e\u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 14 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n\u003cpath class=\"vertical\" d=\"M2.75 7H11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003cpath class=\"horizontal\" d=\"M7 2.75L7 11.25\" stroke=\"currentColor\" stroke-width=\"var(--icon-stroke-width)\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\n\u003c\/svg\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cdiv class=\"details-content rte\"\u003e\n\u003ch3\u003eWhat is a manual valve body TH400?\u003c\/h3\u003e\n\u003cp\u003eA manual valve body requires the driver to select each gear manually with the shifter rather than relying on the transmission to make automatic gear changes. This gives the driver direct control over shift timing, which is useful in rock crawling, racing, and other performance applications.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between a forward-pattern and reverse-pattern TH400 valve body?\u003c\/h3\u003e\n\u003cp\u003eThe difference is the order of the forward gears on the shifter. A forward-pattern valve body follows the more traditional shift direction, while a reverse-pattern valve body changes the gear order so upshifts are made in the opposite direction. The correct choice depends on driver preference and shifter configuration.\u003c\/p\u003e\n\u003ch3\u003eWhat does compression braking mean on a manual valve body?\u003c\/h3\u003e\n\u003cp\u003eCompression braking allows the transmission to provide engine braking when the driver selects a lower gear and releases the throttle. This can be useful for technical descents and controlling vehicle speed without relying entirely on the brakes. A non-compression-braking setup allows the vehicle to freewheel more when off throttle in certain selected gears.\u003c\/p\u003e\n\u003ch3\u003eDoes this TH400 use a vacuum modulator?\u003c\/h3\u003e\n\u003cp\u003eNo. This transmission uses a manual valve body, so the vacuum-operated modulator used on conventional automatic-shift TH400 applications is not part of this setup.\u003c\/p\u003e\n\u003ch3\u003eDoes this TH400 include a torque converter?\u003c\/h3\u003e\n\u003cp\u003eNo. The torque converter is sold separately so the stall speed and converter design can be matched to the engine, camshaft, vehicle weight, tire size, axle gearing, and intended use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e","brand":"Wide Open Design","offers":[{"title":"Forward \/ Yes","offer_id":56920916689062,"sku":"F400T-FCB","price":3200.0,"currency_code":"USD","in_stock":true},{"title":"Forward \/ No","offer_id":56920916721830,"sku":"F400T-F","price":3200.0,"currency_code":"USD","in_stock":true},{"title":"Reverse \/ Yes","offer_id":56920916754598,"sku":"F400T-RCB","price":3200.0,"currency_code":"USD","in_stock":true},{"title":"Reverse \/ No","offer_id":56920916787366,"sku":"F400T-R","price":3200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8394\/6406\/files\/F400T-TH400-Turbo-Transmission-1.jpg?v=1786132493","url":"https:\/\/wideopendesign.com\/products\/th400-4wd-performance-transmission-short-output","provider":"Wide Open Design","version":"1.0","type":"link"}