{"product_id":"ase-2jz-1jz-jaguar-8hp-conversion-kit-8hp70-45","title":"2JZ 1JZ to Jaguar ZF 8HP70 \u0026 8HP45 Conversion Kit | ASE","description":"\u003cp\u003eThis is a complete conversion kit for your JZ engine utilizing a Jaguar 8HP transmission. Kit comprised of Billet Convertor Adapter plate, Billet Flex Plate to replace weak steel OEM JZ flex plate and a billet engine to transmission adapter plate.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBillet 6061 Components\u003c\/li\u003e\n\u003cli\u003e1\" thick adapter plate, machined and surfaced both sides\u003c\/li\u003e\n\u003cli\u003eTorque specifications and part number engraved on the plate\u003c\/li\u003e\n\u003cli\u003eBillet TQ Convertor Flex Plate with \u003cstrong\u003eintegrated starter ring gear\u003c\/strong\u003e — no spacers required\u003c\/li\u003e\n\u003cli\u003eBillet Motor Adapter Plate\u003c\/li\u003e\n\u003cli\u003eComplete Hardware Kit\u003c\/li\u003e\n\u003cli style=\"font-weight: bold; font-style: italic;\"\u003e\u003cem\u003e\u003cstrong\u003eHardened Steel Starter Ring Gear\u003c\/strong\u003e\u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003eRemovable \/ replaceable threaded dowel pins with broached 8mm hex\u003c\/li\u003e\n\u003cli\u003eStarter studs and required starter shim included\u003c\/li\u003e\n\u003cli\u003eOversized 12 × 1.75 converter bolts (larger than Jaguar's 10mm hardware)\u003c\/li\u003e\n\u003cli\u003ePrecision Dowel Pin Holes for Proper Alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTorque specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngine adapter plate bolts — \u003cstrong\u003e50 ft-lb\u003c\/strong\u003e (five 12 × 1.25 flange head)\u003c\/li\u003e\n\u003cli\u003eFlex plate to crank — \u003cstrong\u003e70 ft-lb\u003c\/strong\u003e (eight 12-point)\u003c\/li\u003e\n\u003cli\u003eTorque converter bolts — \u003cstrong\u003e45 ft-lb\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll three are engraved on the components themselves.\u003c\/p\u003e\n\u003ch3\u003eTwo modifications are required\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1. The starter must be modified.\u003c\/strong\u003e Because the billet flex plate carries its own integrated ring gear, the factory starter nose gear has to be cut free, clamped back to its resting position, and welded to the shaft — and the mounting threads drilled out so the starter slides onto the supplied studs.\u003c\/p\u003e\n\u003cp\u003eYou have two ways to handle this:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo it yourself\u003c\/strong\u003e on your original starter. The full process is shown step by step in the video below. You will need an angle grinder with a thin cut-off wheel, a welder, and a drill. Select \u003cstrong\u003eAdapter Kit Only\u003c\/strong\u003e — $1,299.99.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLet us do it.\u003c\/strong\u003e Select \u003cstrong\u003eAdd Modified Starter\u003c\/strong\u003e — $1,449.99 — and a brand new starter ships with the cutting, welding and drilling already completed. No fabrication required on your end.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e2. The transmission needs a converter bolt access window trimmed.\u003c\/strong\u003e Jaguar's factory opening is an inspection port, not a working access hole. Marking and cutting are both shown in the video. This step is required either way.\u003c\/p\u003e\n\u003ch3\u003eWhy this kit covers both the 8HP45 and the 8HP70\u003c\/h3\u003e\n\u003cp\u003eThe Jaguar 8HP45 and Jaguar 8HP70 \u003cstrong\u003eshare the same four-bolt torque converter\u003c\/strong\u003e, which is unique to the Jaguar application. Because the converter bolt pattern is common across both, one kit covers both transmissions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e this is \u003cem\u003enot\u003c\/em\u003e the same as the older Dodge 8HP45, which uses a different converter and is \u003cstrong\u003enot supported\u003c\/strong\u003e. The Jaguar 8HP45 is supported specifically because of the shared Jaguar converter — ASE has verified this fitment directly.\u003c\/p\u003e\n\u003ch3\u003eWhy the adapter plate stays at 1 inch\u003c\/h3\u003e\n\u003cp\u003eThe Jaguar torque converter face sits at an almost dead-neutral offset rather than being recessed like the BMW and Dodge 8HP variants. That is why the Jaguar bell housing is slimmer — it begins tapering immediately instead of extending rearward to wrap around the converter body, which means less transmission tunnel intrusion.\u003c\/p\u003e\n\u003cp\u003eClearing the converter spud conventionally would require a plate around 1¾ to 2 inches thick, pushing the widest part of the bell housing back into the tunnel and giving up the exact advantage the Jaguar unit was chosen for.\u003c\/p\u003e\n\u003ch3\u003eYou will also need a TCU\u003c\/h3\u003e\n\u003cp\u003eThis kit is the \u003cstrong\u003emechanical\u003c\/strong\u003e engine-to-transmission adapter only. The 8HP is electronically controlled and will not shift without a standalone transmission controller — such as the TurboLamik TCU 8HP Controller — purchased separately.\u003c\/p\u003e\n\u003ch3\u003eComplete installation video\u003c\/h3\u003e\n\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin-bottom:1.5rem;\"\u003e\n\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/zGhX20LVwZk\" title=\"Is this the Best 2JZ to 8HP Jaguar Adapter Kit yet?\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/news\/2jz-1jz-to-jaguar-zf-8hp-adapter-kit-installation-guide\"\u003eRead the full written installation guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFits The Following Models\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJaguar F-Type 3.0L V6 2013-2020 8HP70\u003c\/li\u003e\n\u003cli\u003eJaguar F-Type 5.0L V8 2014-2020 8HP70\u003c\/li\u003e\n\u003cli\u003eJaguar\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eX250 XF XJ 2015-2019 8HP45\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eJaguar XF 3.0L V6 2013-2020 8HP70\u003c\/li\u003e\n\u003cli\u003eJaguar XF 5.0L V8 2014-2020 8HP70\u003c\/li\u003e\n\u003cli\u003eJaguar XJ 3.0L V6 2013-2020 8HP70\u003c\/li\u003e\n\u003cli\u003eLand Rover Range Rover Sport 5.0L V8 2014-2017 8HP70\u003c\/li\u003e\n\u003cli\u003eLand Rover Range Rover Sport 3.0L V6 2014-2019 8HP70\u003c\/li\u003e\n\u003c\/ul\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does this kit really fit both the Jaguar 8HP45 and the 8HP70?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The Jaguar 8HP45 and Jaguar 8HP70 share the same four-bolt torque converter, which is unique to the Jaguar application, so one kit covers both. ASE has verified this fitment directly.\"}},{\"@type\":\"Question\",\"name\":\"Is the Jaguar 8HP45 the same as the Dodge 8HP45?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The older Dodge 8HP45 uses a different torque converter and is not supported. Only the Jaguar 8HP45 is covered, because of the shared Jaguar converter.\"}},{\"@type\":\"Question\",\"name\":\"Which Jaguar and Land Rover models does this cover?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Jaguar F-Type 3.0L V6 2013-2020 and 5.0L V8 2014-2020, Jaguar X250 XF and XJ 2015-2019 on the 8HP45, Jaguar XF 3.0L and 5.0L 2013-2020, Jaguar XJ 3.0L V6 2013-2020, and Land Rover Range Rover Sport 5.0L V8 2014-2017 and 3.0L V6 2014-2019.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a transmission controller as well as this kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. This kit is the mechanical adapter only. The 8HP is electronically controlled and needs a standalone TCU, such as the TurboLamik TCU 8HP Controller, purchased separately.\"}},{\"@type\":\"Question\",\"name\":\"What is included?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Billet torque converter flex plate with integrated starter ring gear replacing the factory JZ steel flex plate, billet motor adapter plate, threaded dowel pins, starter studs, the required starter shim and complete hardware including oversized converter bolts.\"}},{\"@type\":\"Question\",\"name\":\"Why does the kit include a billet flex plate?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It replaces the weak steel OEM JZ flex plate, which is a known failure point at the torque levels these conversions run.\"}},{\"@type\":\"Question\",\"name\":\"What are the torque specifications for this kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Engine adapter plate bolts 50 ft-lb using five 12x1.25 flange head bolts. Flex plate to crank 70 ft-lb using eight 12-point bolts. Torque converter bolts 45 ft-lb. All three values are engraved directly on the components.\"}},{\"@type\":\"Question\",\"name\":\"What modifications are required to install this kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Two. The starter must be modified by cutting the nose gear free, clamping it back to its resting position, welding it to the shaft, and drilling out the mounting threads so it slides onto the supplied studs. The transmission also needs a converter bolt access window trimmed into it, because the Jaguar factory opening is an inspection port rather than a working access hole.\"}},{\"@type\":\"Question\",\"name\":\"Do I have to modify the starter myself?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The starter modification is required for the kit to work, but you can choose who does it. Select Adapter Kit Only at 1299.99 USD and modify your original starter yourself following the installation video, which needs an angle grinder with a thin cut-off wheel, a welder and a drill. Or select Add Modified Starter at 1449.99 USD and Autosports Engineering ships a brand new starter with the cutting, welding and drilling already completed, so no fabrication is required.\"}},{\"@type\":\"Question\",\"name\":\"How much does the pre-modified starter cost?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Add Modified Starter package is 1449.99 USD compared to 1299.99 USD for the adapter kit alone, so the pre-modified starter adds 150 USD and includes a brand new starter rather than modifying your existing one.\"}},{\"@type\":\"Question\",\"name\":\"Do I need thread sealant on the flex plate bolts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Toyota drilled the JZ crank bolt holes all the way through, leaving a gap behind them. Without Loctite, FIPG or silicone on the threads, engine oil will wick up the bolt threads over time and leak out onto the flex plate. Toyota used Loctite originally; FIPG also works. Using nothing will result in a leak.\"}},{\"@type\":\"Question\",\"name\":\"Does this kit use spacers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The billet flex plate has an integrated starter ring gear, which eliminates spacers entirely and means the factory JZ flex plate is not reused.\"}}]}\u003c\/script\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"VideoObject\",\"name\":\"Is this the Best 2JZ to 8HP Jaguar Adapter Kit yet?\",\"description\":\"Complete end-to-end assembly of the Autosports Engineering 2JZ\/1JZ to Jaguar ZF 8HP adapter kit, covering the billet adapter plate and flex plate with integrated starter ring gear, all three torque specifications, the starter modification, and trimming the transmission converter bolt access window.\",\"thumbnailUrl\":\"https:\/\/i.ytimg.com\/vi\/zGhX20LVwZk\/maxresdefault.jpg\",\"uploadDate\":\"2026-09-04T00:00:22Z\",\"duration\":\"PT32M25S\",\"embedUrl\":\"https:\/\/www.youtube.com\/embed\/zGhX20LVwZk\",\"contentUrl\":\"https:\/\/www.youtube.com\/watch?v=zGhX20LVwZk\",\"publisher\":{\"@type\":\"Organization\",\"name\":\"Autosports Engineering\"}}\u003c\/script\u003e","brand":"Autosports engineering","offers":[{"title":"Adapter Kit Only","offer_id":49189653971161,"sku":"81005","price":1299.99,"currency_code":"USD","in_stock":true},{"title":"Add Modified Starter","offer_id":49189654003929,"sku":"81005-1","price":1449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2734\/8185\/files\/2jz_8hp_jaguar_2.png?v=1776136788","url":"https:\/\/www.autosportsengineering.com\/products\/ase-2jz-1jz-jaguar-8hp-conversion-kit-8hp70-45","provider":"Autosports engineering","version":"1.0","type":"link"}