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Jeff Chambers · 01-08-2006, 06:24 PM

Yep, depends on what vehicle and what year the rebuild AOD orignally came from. The drive gear is actually machined onto the output shaft of the AOD so its not possible to change it without tearing the tranny down and replacing the output shaft. Now if you can figure out what output shaft is in the trans, you can match the driven gear for a correct reading. Driven gears are cheap, so you just might buy one in each direction of where you're at now and give them a try. It only takes a few minutes to change out a driven gear.

See here http://www.crt-performance.com/speedometers.htm for more information.

01-08-2006, 06:24 PM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: speedo & AOD Yep, depends on what vehicle and what year the rebuild AOD orignally came from. The drive gear is actually machined onto the output shaft of the AOD so its not possible to change it without tearing the tranny down and replacing the output shaft. Now if you can figure out what output shaft is in the trans, you can match the driven gear for a correct reading. Driven gears are cheap, so you just might buy one in each direction of where you're at now and give them a try. It only takes a few minutes to change out a driven gear. See here http://www.crt-performance.com/speedometers.htm for more information. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"