Hello i have a dumb question ...... what does a Locking diff D/R RX tranny do ? sorry i am new !! i can get one and was wondering what it does and will i need a new rear diff. it will go in a 1983 brat.

Well first of all, its a full time tranny.

Second, the diff lock makes the power ratio to front and rear 50/50.

It will also cause serious binding if you use it on dry pavement(the diff lock).

In addition to what Rob said, you will need to read up on swapping 5-speeds into older cars that came with 4-speeds. You will need a 3.70 ratio rear end to match the transmission's gear ratio, too.

Also forgot about the axles.

The RX axles are 25 spline.

Brat axles are 23.

Also forgot about the axles.

The RX axles are 25 spline.

Brat axles are 23.

 

is their a fix for that or will it not work ?

is their a fix for that or will it not work ?

 

Need to convert the front hubs to EA82.

Or have special axles made up.

I'm working on getting EA82 hubs on a EA81, but its going to be a while.

Or you need one that has the stubs on the transmmission converted. This requires taking the trans apart and changing the stubs but the nice thing is you can use stock brat axles from then on.

 

I have one I am considering selling. I resealed it and installed it in my Ej22 conversion car and decided to try a part time 5 speed instead. PM me for more information.

Need to convert the front hubs to EA82.

.

 

if that's the route you want to go, you'll also have to widen your track width (or shorten the axles).

 

 

 

really, the RX trans doesn't add anything offroad. but the full-time 4WD adds some street manners (especially in more-than-stock-EA82 hp situations) over just FWD.

 

 

 

I think it's a great trans for a street-driven, stock-height EJ22-swapped car that's used in short track, low traction racing (RallyX and Ice Racing).

 

great gearing for short track racing in low range. but with the center un-locked, you tend to spin a front tire when exiting corners in AutoX, so it's hard to put the power down.

 

and the 3.7 axle ratio and 1.2:1 low range are less than ideal for larger tires and "crawling".....

 

 

 

my 2 cents

Or you need one that has the stubs on the transmmission converted. This requires taking the trans apart and changing the stubs but the nice thing is you can use stock brat axles from then on.

 

I've got a couple that I need to tend to anyway, what does this procedure require? Resetting gears or anything like that?

 

Can new syncros and seals still be bought from Subaru?

thanks for all the help.

Edited October 14, 200916 yr by thermalsurfing1

Split the transmission main case and the ring section has the stub shafts coming out of it. I remember them being c clipped into the ring pumpkin and being able to swap them. It will be obvious when you get it apart though.