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A500's are 2wd trannies. In order to do the swap you will need a crossmember from the donor vehicle, and a switch for the lockup and or overdrive. I would recommend using separate switches, but it doesn't really matter. I think the A500 is longer than the 904, so you may have to have your driveshaft shortened.
 

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CLRracer said:
i thought a500s came in 4x4 in the daks as well. but i would go with an a518.

Duane
You very well may be right there... I agree about going with the 518 though, or a 46RE out of a newer one...Same case as the 518 IIRC.
 

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A500's are 904 based trannys, A518's are 727 based trannys. Basically, the newer trannys are the old trannys with an OD unit on the tailshaft. I am not positive, but I believe the newer 4x4 dakotas use an A500.

The 518 is stronger, but also has more parasitic loss. An A500 with some internal mods should live happily behind a motor putting out up to 300 HP.

-SM
 
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