The Texas Speed Hemi to 727/904 SFI Flexplate is made for Gen III Hemi swaps that keep a classic Chrysler TorqueFlite 727 or 904 automatic. The plate bolts to the 8-bolt crank flange of a 5.7L or 6.1L Hemi and is drilled for the 4 x 11.125" and 4 x 10.00" converter bolt patterns used by TorqueFlite torque converters, so the modern engine and the older transmission can be joined without a custom adapter.
The flexplate has no ring gear, as the 727 and 904 use a converter-mounted ring gear for the starter. It is SFI 29.1 certified, stamped from cold-rolled chromoly steel .035" thicker than a factory plate, internally balanced and finished in gold irradiate coating to resist rust. It is a direct bolt-on component sold as a single flexplate.
Specifications
- Application: 5.7L and 6.1L Hemi to Chrysler 727 or 904 TorqueFlite transmission
- Material: Cold-rolled chromoly steel
- Crank bolt pattern: 8-bolt
- Ring gear: None (starter ring gear carried on the TorqueFlite converter)
- Balance: Internal
- Converter bolt patterns: 4 x 11.125" and 4 x 10.00"
- Certification: SFI 29.1
- Thickness: .035" thicker than a stock flexplate
- Finish: Gold irradiate coating to resist rust
- Installation: Direct bolt-on
- Part number: TSP-39200 (Texas Speed 1839200)
FAQ
What is the Texas Speed Hemi to 727/904 flexplate used for?
It lets a 5.7L or 6.1L Gen III Hemi with an 8-bolt crank flange run a Chrysler 727 or 904 TorqueFlite automatic by providing the 4 x 11.125" and 4 x 10.00" converter bolt patterns those transmissions use.
Why does this flexplate have no ring gear?
The 727 and 904 TorqueFlite transmissions carry the starter ring gear on the torque converter rather than on the flexplate, so the Texas Speed Hemi to 727/904 plate is made without one.
Which Hemi engines does this flexplate fit?
Texas Speed lists it for the 5.7L and 6.1L Hemi with the 8-bolt crankshaft flange. It is internally balanced for those engines.
Is this swap flexplate SFI certified?
Yes. It is SFI 29.1 certified and made from cold-rolled chromoly steel .035" thicker than a stock flexplate, with a gold irradiate finish to prevent rust.
Does this flexplate fit a modern Hemi transmission like the 545RFE or 8HP?
No. It is drilled only for the 4 x 11.125" and 4 x 10.00" TorqueFlite converter patterns. For a factory style Hemi converter with the 8 x 12.00" pattern, use the Texas Speed TSP-34500 or TSP-37010 flexplate instead.
