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Hi all. Just curious as to whats involved in a wrx box swap into the rx sedan. any help or direction is greatly appreciated.
cheers guys

If your still running the EA engine you'll need an adapter plate for starters. If your dropping the EJ engine in with the box you'll just need to mod a few bits, someone else here will beable to tell you all the in's and out's of this.

If your car is front wheel drive only (ie not selectable 4wd) you'll need to put in a 4wd rear end to fit a rear diff in.

You'll have to look at your CV's too, they won't be the same as the original box.

Check out the Tech manual, that should give you a good idea for a start.

Hope this is of some help.

im not too sure i want to get rid of this engine. Its simons old car( QIKRX ) and he spent a whole wad on it, cash that is.
its already insanely fast and gettin a new paint job so the next step is the transmission as its next to fail.
Any ideas on vendors for the box adaptor?? It was mentioned that i will need the linkage assy as well so i can modify it as well , any ideas people??
Cheers again

I believe that you need to get the engine side of the gearbox mounting modified shorter ... for the same reason that an EA gb to EJ engine requres the 16mm ( or whatever it is ) width adaptor.

Why not look into an EA awd gearbox from steve rising run or others, I've also heard of people stuffing liberty AWD internals into an EA82 gearbox ( with some sort of extension out the back ).

The liberty gearsets will fit into the ea82 casing, however you will still need to use the liberty rear extension housings.

So the end result would bolt up to the ea82 engine and the current clutch could still be used, but new gearbox mounts will have to be fabricated, the tailshaft will have to be shortened (~ 60mm I think) and the shifter linkages will also have to shortened. The rear diff will also have to match the former EJ box.

Not sure how late the interchangability goes, but I would avoid gen1 Lib RS/legacy gearboxs if you are after any strength. the later wrx twin synco internals would be nice!

PPG and PAR are two other manufacturers of stronger gears. Although the ea82 gearbox case itself might not be strong enough to take a great deal of punishment.

If its using RX cv's (25 spline) then they will fit straight on an EJ gearbox.

also watch the rear shafts ESPECIALLY if you have the 95-96 rear LSD with the twin spline shaft on one side. its not a simple case of swapping ends for some reason. (I'm still sorting this one out!)

Chris_Rogers wrote:also watch the rear shafts ESPECIALLY if you have the 95-96 rear LSD with the twin spline shaft on one side. its not a simple case of swapping ends for some reason. (I'm still sorting this one out!)

What is this twin spline shaft? Got any pics?

I'm guessing theres a grove in the top of the rise one one of the splines, creating a two layer spline effect...

Sorry for the hi-jack...

MY_STI wrote:The liberty gearsets will fit into the ea82 casing, however you will still need to use the liberty rear extension housings.

So the end result would bolt up to the ea82 engine and the current clutch could still be used, but new gearbox mounts will have to be fabricated, the tailshaft will have to be shortened (~ 60mm I think) and the shifter linkages will also have to shortened. The rear diff will also have to match the former EJ box.

I might look into doing this... is it a little harder than an Ej gearbox swap retaining the EA motor? And do you know if it is possible to just take out the centre diff and outter casing to bolt on to the exisiting EA gearbox (eg not do a whole swap over of gear sets from the EJ box into the L box)?

Cheers

Never put an EJ box up to an EA motor so I couldn't say if its harder than swapping internals.

The latter is definatly not possible, there is an extra shaft for the front diff running through the lower gearset on the awd box.

You dont have to take the gears off the shafts, unless you want to put a 3.9 gearset up to 4.11 diffs or similar.
Picking up the low range requires a little modification to the case for the low range detent spring/ball and a little modification to the (internal) low range selector if you are using L series low range gearset.

I have built an ea82 awd box into a liberty casing and used the ea rear extension housing, gearbox bolts up to the EJ22, and the gearbox bolts up to the car. Haven't driven it yet, engine only went in yesterday.

El_Freddo wrote:What is this twin spline shaft? Got any pics?

I'm guessing theres a grove in the top of the rise one one of the splines, creating a two layer spline effect...

Sorry for the hi-jack...

not quite,

teh one I have has a smaller set of splines inthe end of the shaft then the main set fot the ring gear. so two sets of splines on one shaft. its only the early ones that had it.

Going to start a new thread on the gearbox to end the hijack now...