Owner-Produced Paperwork Required
This mostly-new dukes-type Piper Comanche landing transmission basic assembly P/N 25720-003 as shown below is $2,950 exchange plus shipping and insurance. The black and red components are powder coated and the other pieces cadmium plated, also includes new placards. The updated bushing [safety issue] P/N 21038-007 is included, also owner produced.
P/N 25720-000 – transmission complete with release, brake, new coupler and OHC motor. After installation of your new transmission, ship your old assembly but you have only 2 weeks for this option; I need the motor and other components for exchange and refurbish for future transmissions. I charge a hefty core unless I know you; then it is optional. I trust most but a customer in Johannesburg, SA stiffed me; I trusted him too, but no more.
Similar service requirements apply as the original Dukes transmissions, i.e. 500 hour or annually; disassemble, inspect, and lubricate with Dukes specification #4 lubricant. The ballscrew lubricant specified in the SMs is AeroShell® #7 at annual and 100-hour intervals; I suggest using Aeroshell® #64. AeroShell® #7 just doesn’t lend itself to longevity of ballscrew life. Aeroshell® #64 contains 5% Molybdenum Disulfide, an extreme-pressure additive. The original ballscrews would have lived longer with regular use of this grease; ballscrews are a common failure, all are supplied with new.
P/N 25720-003 includes P/N 21855-000 release arm components, without P/N 21286-000 motor, brake asm, or coupler; $2,950 exchange each.
To simplify all this information, if you want an almost-new everything P/N 25720-000 the price is $3,750 exchange. See the “new” motor on page 4. This option includes a new coupler and new plunger style brake assembly which are also owner produced components.
Compare this to an exchange Dukes transmission if you can find one, that may not have any new components; $3,995. I sold an NOS Dukes for $5,000 in 2020.
Dukes quoted/guesstimated between $7,000 and $8,000 more than 10 years ago for the sub-assembly P/N 25720002 pictured above, without release arm components, motor, or brake asm. Photo for reference only, not for sale in this configuration.