PRECISION FLYER REPAIRS
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American Flyer GP20 TMCC Conversion 
(click on photo to enlarge, click here to see YouTube video)
Lionel AF Illinois Central Gulf GP20 6-48001 made in 1987
The rear axle is lame. Time to look under the hood.
Split nylon worms at both ends. Not unusual, but important to address.
Worn teeth on the drive gear paired with the worst of the two worms.
Badly off-centered drive gear -- didn't help matters.
One good thing about early production L/AF diesel trucks - replaceable bushings.
Time to replace the nylon and plastic with metal.
Done, except for fresh lubrication.
Early L/AF electronic reverse unit. (Many of them smell pretty badly when running.)
On Geeps and PA side frames, electro-couplers protrude about 3/16" more than originals. On some other side frames not as much or at all.
Now with their centering blocks installed.
Front LED on the left. Rear on the right with tip sanded to increase light distribution.
Lamp modules fitted with LED's.
Mock-up with dummy boards.
ERR Cruise Commander Lite and GP RailSounds Commander on deck.
Wired up, fired up, and ready for the shell to go on.
Almost forgot to show the Run/Pgm switch
Front electro-coupler. Note: L/AF GP front couplers stick out more than the rear by default. Lionel notched the 3rd step for side frame clearance - see red circle.
Rear coupler with electro-coupler. Note: no notch in third step.
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