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This 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.
All three are engraved on the components themselves.
1. The starter must be modified. 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.
You have two ways to handle this:
2. The transmission needs a converter bolt access window trimmed. 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.
The Jaguar 8HP45 and Jaguar 8HP70 share the same four-bolt torque converter, which is unique to the Jaguar application. Because the converter bolt pattern is common across both, one kit covers both transmissions.
Important: this is not the same as the older Dodge 8HP45, which uses a different converter and is not supported. The Jaguar 8HP45 is supported specifically because of the shared Jaguar converter — ASE has verified this fitment directly.
The 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.
Clearing 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.
This kit is the mechanical 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.
Read the full written installation guide →
Fits The Following Models
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