Is the Dodge 8HP45 supported?

No. The older Dodge 8HP45 uses a different torque converter and no kit is offered for it. The Jaguar 8HP45 is a separate transmission and is covered by ASE's Jaguar kit.

Is this the same as the Dodge Ram truck kit?

No. Truck 8HP units use a different kit which is listed separately. Confirm whether your transmission came from a car or a truck platform before ordering.

How does one kit cover both Dodge converter diameters?

An adapter sleeve drops into the center bore of the billet flex plate to reduce it, covering the smaller converter spud found across second and third generation Dodge transmissions. Remove the sleeve and the same plate accepts the larger spud. Two threaded holes accept 8-32 socket head bolts for positive retention, and the sleeve sits on a machined lip with three relief points so a punch can tap it back out if it ever seizes.

Do I need a transmission controller as well?

Yes. This kit is the mechanical adapter only. The 8HP is electronically controlled and needs a standalone TCU, purchased separately.

Why does the kit include a billet flex plate?

It replaces the weak steel OEM JZ flex plate, which is a known failure point at the torque levels these conversions run.

Billet adapter plate, billet torque converter flex plate, billet motor adapter plate, pilot spud adapter, hardened steel starter ring gear, complete hardware and precision dowel pins.

2JZ 1JZ to Dodge Mopar 8HP50 8HP70 8HP90 Conversion Kit

Name: 2JZ 1JZ to Dodge Mopar 8HP50 8HP70 8HP90 Conversion Kit | ASE
Brand: Autosports engineering
SKU: 81004
Price: 1099.99 USD
Availability: InStock

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2JZ 1JZ to Dodge Mopar 8HP50 8HP70 8HP90 Conversion Kit | ASE

$1,099.99 $1,199.00

No verified Year / Make / Model fitment is currently listed. Confirm compatibility before ordering.

Brand: Autosports engineering SKU: 81004

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This is a complete conversion kit for your JZ engine. Kit comprised of Billet Adapter plate, Billet Flex Plate to replace weak steel OEM JZ flex plate and a billet engine to transmission adapter plate.

Billet 6061 Components
Billet TQ Convertor Flex Plate
Billet Motor Adapter Plate
Complete Hardware Kit
Pilot Spud adapter
Hardened Steel Starter Ring Gear
Precision Dowel Pins for Proper Alignment

Which 8HP transmissions this kit covers

Mopar car-platform 8HP50, 8HP70, 8HP75, 8HP90 and 8HP95. The older Dodge 8HP45 is not supported — it uses a different torque converter.

(The Jaguar 8HP45 is unrelated to the Dodge unit and is covered by ASE's Jaguar kit.)

Car platform, not truck

Dodge/Ram truck 8HP units use a different kit, listed separately — check which you have before ordering.

Converter centering sleeve

The billet flex plate uses an adapter sleeve that drops into the center bore to reduce it, so one kit covers both Dodge converter diameters found across second and third generation transmissions. Remove the sleeve for the larger spud and the same plate handles it.

Two threaded holes accept 8-32 socket head bolts if you want the sleeve positively retained. The sleeve sits on a machined lip that keeps it elevated off the full surface, with three relief points — so if it ever seizes after heat and load cycling, a punch or screwdriver taps it straight back out.