[Mike Lawson]

Which floor tunnel should I use with an F-Body Overdrive-4, if I want to swap it into an '82 Dodge Mirada?

 

[valiant67]

You need parts from an F (Aspen or Volare) or an M LeBaron/Diplomat). Many more manuals Fs than Ms. The J (Mirada/Cordoba) shares the same floor pan as the F/M.

 

[Bearhawke]

As valiant67 stated. Back in the day; quite a few F's had factory 4 speeds albeit with top gear being overdrive but, the tranny hump, pedals and linkage don't know the difference. Where you may get in trouble is finding V8 specific parts i.e. bellhousing and clutch linkage but I suspect A/B body stuff will work.

 

[dana44]

From what I know about the manual transmission, aluminum case indicates overdrive, cast iron case is all four speed, same otherwise shape/size/attaching points.

 

[valiant67]

Yeah the only real external difference is the 3/4 lever is flipped, 4th gear remains 1:1 but becomes 3rd gear due to the reversed lever then the old 3rd gear becomes OD.

 

[Bearhawke]

Yeah the only real external difference is the 3/4 lever is flipped, 4th gear remains 1:1 but becomes 3rd gear due to the reversed lever then the old 3rd gear becomes OD.

Correct me if I'm wrong but; weren't the OD vehicle bellhousings different (larger hole) to accommodate a bigger front tranny bearing/seal 'retainer', the exact name of that piece escapes me at the moment.

 

[valiant67]

I think you are correct, that should be another way to ID one, though I was considering the trans bolted to the bellhousing when I meant external.