Owner-Produced Paperwork Required
This mostly-new / functionally new Dukes-type Piper Comanche landing transmission basic assembly P/N 25720-003, without motor, release, coupler, or brake assembly, as shown below is $3,600 exchange plus shipping and insurance. The black and red components are powder coated and the other pieces cadmium plated, includes new placards. The updated bushing [safety issue] P/N 21038-007 is included, also owner produced.
P/N 25720-003 below includes P/N 21855-000 release components, but without P/N 21286-000 motor, 24948-000 brake assembly, or new coupler P/N 757-833.
This “new Dukes type transmission” can also be interpreted as a “repair” to your crappy Dura transmission.
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 of my transmissions are supplied with a new ballscrew assembly.
P/N 25720-003 includes P/N 21855-000 release arm components, without P/N 21286-000 motor, brake assembly, or coupler; $3,600 exchange each.
To simplify all this information, if you want an almost-new everything P/N 25720-000 the price is $4,500 exchange. See the “new” motor. 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, another shortly after for $5,500.
Dukes quoted/guesstimated between $7,000 and $8,000 more than 12 years ago for the sub-assembly P/N 25720-002 pictured above, without release arm components, motor, or brake assembly.
Photo for reference only, not for sale in this configuration.