71 Dodge 340 manual trans

[ant72]

Hi, just wondering what needs to be changed on a 340 originally matted to a manual transmission. I plan on using my 904 that I already have installed. Thanks.

 

[cuda65vpt]

i think you just need to remove the pilot bushing.

 

[ant72]

That's what I was thinking, is there a plug that goes in its place?

 

[davescuda]

all you need to do is change your drive shaft yoke. If your 4 speed tail shaft was large spline. if it was small plane nothing at all

 

[davescuda]

i think you just need to remove the pilot bushing.

I think you can leave it in.

 

[rumblefish360]

Sorry, isn't the 904 shorter than the 4spd manual?
Also, isn't the 4spd manual and the 727 the same length & use the same slip yoke?
Or is it a mixed bag of yoke sizes through the years?

 

[ant72]

I already have the trans, drive shaft and rear end installed. Just an engine swap.

 

[sireland67]

For a 4-speed to 904 conversion.
Take the 4-speed stuff out and sell it to me.
Bolt a auto flex plate to the crank, make sure it is for a 904, there is different diameter on 727's it takes shorter bolts than the 4-speed.
As mentioned before the drive shafts are different lengths, maybe yoke size, and is different from which rear end you have.
Most likely you will be running a floor shift for the auto, so I recommend buying a locker kick down cable, less headaches.
You can just shove the 4-speed petal to the floor, or if you really want the auto petals I think I have two in my barn.

 

[sireland67]

Don't forget the transmission lines, just add a auxiliary cooler.

 

[darndart]

I think you can leave it in.

I believe it needs to be removed, because the alignment nub on the front of the converter needs to go into that hole.