rear end ratio (and what else?)

[esteveW]

It is just dawning on me that when I change trannys, I have to consider changing the rear end to match the output to the front wheel ratio of the transaxle. I don't know how I missed that.

 

I guess, as I'm wheeling and dealing with the junkyard for the tranny, of my choice, I should get him to throw in the rear end as well. Along with the axles, I suppose.

 

While I'm under the Brat, I might as well do a moderate lift so the tranny will fit easier.

 

Oh-MY!!! What am I getting into??

 

Steve

[MilesFox]

as long as you stick to non turbo 5spds, your axles and 3.9 rear will be the same. if you have a chance to score the ea82 diff along with the trans, that is a better choice, and a closer match. use the ea82 driveshaft either way

 

if you found a turbo or rx tranny, you will have 25 splines for the axle which does not fit your 23 spline axle, and you will also need the rear diff which is 3.7 gear

 

if you had 25 spline trans, you will need a good machinist to shorten the turbo axles that go with the trans to fit the brat with a narrower track

 

suppose you could mix and match axle races and cups, but that would involve finding all the different variations of axles and their dimensions to see what fits, or have tons of them laying around to play legos with