STi Type RA 555 DCCD gearbox
 

hi

i bought gearbox TY752VB4CA from STi Type RA 555 with DCCD, but i dont hv the diff control module. I want to install it in Impreza GT MY98

My 1st qstn is if i can install it now without diff controller and drive normally ( i suppose that it will work only in open mode)

2nd qstn is what i hv to do in order to hv DCCD fully operational

here is link to the bid - pls advise what to do to hv it fully operational

Subaru Impreza STI Type RA 555 Gearbox - eBay (item 180224503983 end time Mar-23-08 06:13:48 PDT)

It depends what rear diff you have as the Dccd box will have a 1:1 transfer box and 3.9 front diff.

If you have a 3.9 rear diff (unlikely imho - possibly a 4.11 in yours?) then yes you can fit it and use it straight away,but it will be fully open as you say. You can't mix the diff ratios with a 1:1 transfer box.

To control the diff you'll need the diff ecu,controller wheel and dash lights
to display the level of lock plus wiring - just two wires into the box itself. Either get hold of the original subaru kit or look up the Neetronics diff controller which is allegedly easy to fit and cheaper to get hold of.

Good luck

tks m8

looking for neetronics controller ;)

Also, Spiider’s DCCD Shop

Jeff is a good bloke and has a very nice auto version controller that I have just ordered for mine!

Wayne.

already sent him an e-mail - tks m8

could you send me pm with price you paid ?

already ctc Jeff, Wayne pls tell me which contoller you ordered

The auto controller mate! with OEM thumbwheel.

i already ordered at Jeff's side ;) tks Wayne ;)

i need additional info - what was rear diff ratio in this tranny ? TY752VB4CA

main of the gearbox is 3.90 according to info i got for this tranny - and what ratio shoudl hv rear diff couse my ori from GT MY98 seems to be wrong for this

according to my mechanic if gearbox hv 3.90 rear diff should hv 3.55 ratio - is it correct ?

3.9 too as it's an STi 2RA box , so will have 1:1 Transfer gears and therefore will require matching front and rear diffs:

JDM Impreza WRX STi RA Ver.II MY96 (also STi RA 555 & RA V-Limited Ver.II MY96)

TY752VB4CA

1st to 5th gear 3.454 2.333 1.750 1.354 0.972 reverse 3.416 transfer gears 1.000 front diff 3.900

DCCD (35:65 Open) Double-cone 3rd synchro added (RA only)

is there any possibility to use other diff than from RA?

my old tranny was also 3.9 but with 1:1,1 on the rear shafts and i hv rear diff which work with that tranny

If you really have 1.1:1 transfer gears then you will need a differing rear diff and if you have one that works ( rear 3.54 I think ?) then yes work away.

I run a dccd diff that was retrofitted to my P1 to replace the viscous 50:50 centre diff - the rear diff is the smaller R160 type, rather than the larger R180 normally run with Dccd boxes/ Ra's etc, but fortunately the P1 front and rear diffs and the 1:1 transfer gears are all compatible.

Fat Boy - this DCCD tranny is 3.9 with 1:1 but my old tranny was 1:1,1 with rear diff 3,54.

i need to hv my car ready till weekend couse on saturday i hv rally organized by Subaru Poland and i would like to join it.
i hv no chance to organize diff from RA with dsame gearbox. Thats why i'm thinking which one i can use. I think that some diff from N/A impreza/forester/legacy will fit only i will take rear viscous from my old diff and put it ther.

I need to know which diff to look for

in Poland there are not so much RA/R or any other classic STi so i hv no chance to find 2nd hand rear diff which fit to this DCCD tranny

thats why i asking which other diff (not STi) i can use for this conversion once i put my rear viscous inside

If your old transmission is still fitted or works and can be refitted then why not use that for now and then keep an eye out on here or 22B.com for a suitable 3.9 rear diff to match up later on

You need to be careful about just changing the internals of the rear diff and hoping the half shafts will fit as well as there is a great variety of options there as well which has caught several people out before. Best bet is to find a whole classic rear axle, with the right diff, hubs and half shafts in as well - an added bonus of picking up an Sti R180 rear end is that you can probably get the attached Sti 2 pot rear brakes as well which are better than the standard.

Experts on here are API engines ( they advertise on here )who keep large stocks of all possible permutations of boxes axles . Give David O'Brien a ring there - he'll know the answers.

Fat Boy - tks for info

regarding diff this will be calculated by my mechanic ;) 3.9 dif is on the way and will see ;)
if not fitting i call David

regarding old tranny - it would be killed in 2 days on this setup i hv now :D
even with VF39 cutted to 0,8 bar :D

all is running now - my mechanic is a god :D

yesterday i got my car back and i'm in shock - really big distance to former setup

i go for a ride :D

hey guys !!
PLEASE HELP ME

i did a swap TY752VB4CA now i have no DCCD controller for my tranny i live in CHILE and dont know where to buy one !! my car is a (impreza 2.0 GX AWD ) i swap a wrx sti V2 tranny and rear diff with motor and harnnes , but didnt get the controller...., now my car did have the connector for the wires but it does NOT work.

i went on DCCDpro.com they have one for 160.00 dollars but they dont shipp to CHILE .... NOW WHAT ???

anyone with a solution cus everytime i turn my car goes click click click and i can feel the diff being lock 100% if i disconected the wires will it un lock ?
would it run OPEN ?

Yes if disconnnected it will run open and will run 65R/ 35F. despite mine having a controller I run it open 99% of the time.

Keep an eye out on here in for sale or on 22b.com as the controllers do come up now and then

Thanks man !!