How many using an A500 overdrive ?
Are lock up 904's the same as an abody 904? Gear ratios same ?
My understanding is that a Lockup 904 is actually an A998 or A999. Basically an updated 904 though. I might be wrong here, but I think 904=3 forward clutches, 998=4, 999=5
Gear ratios are the same,
2.74:1 First, 1.54:1 Second, 1:1 Third, 2.21:1 Reverse and if an O/D version, 0.69:1
Most Google searches bring me right back to FABO, such as;
904 lockup info
Lots of info in this book by Tom Hand,
SA Design, Chrysler TorqueFlite A-904 & A-727 Transmission-How to Rebuild​
It does not offer any info on the Overdrive portion, but you can apply the info to the main 3 speed part. Overdrive portion has much info in the truck and/or Diesel forums (weed through a lot of stuff)-unlike here, most forums seem to have a lot of "Facebook level" info, questions, and answers, but you come across links to supplies and other info.
Dodge Transmissions - Torque Converters and Transmission Parts. Seemed nice to deal with, very helpful.
I've used this for the info, can't say anything about ordering or personnel
MOPAR Chrysler Dodge Pymouth Automatic Transmission Parts
I am currently working through my transmission with ZERO experience, and it isn't on the road yet so I can't offer usage feedback, but I'm doing it based on the positive experiences and info of many of the posters on the 3 pages of this thread.
