mark28

can i bolt my DCCD to this TY752VBICA ??

also whats this box come out of TY754VBAAA ??

thank you, mark

mark28

[quote=me]can i bolt my DCCD to this TY752VBICA ??

will the front diff in this box be ok to run with my rear diff, my99 TYPE R

all this subaru stuff is still very new to me, so sorry for all the basic questions.

APIDavid

iTrader: (4)

Mark, You'll need a TY 752 type dccd to fit a TY 752 box I have never seen anyone successful in fitting a TY 754 type to a 752.

754 VBAAA is Version 5 / 6 regular 5 speed with a 4 KG viscous centre diff. Ratios are: [ same as P1 ]

1st 3.166 :1
2nd 1.882 :1
3rd 1.296 :1
4th 0.972 :1
5th 0.738 :1

final drive is 4.4:1

front diff is open type [ no LSD ]

That help ??

Good Luck David APi Engines / APi Impreza
www.apiengines.com

mark28

[quote=APIDavid]Mark, You'll need a TY 752 type dccd to fit a TY 752 box I have never seen anyone successful in fitting a TY 754 type to a 752.

thanks dave, Can you tell me what the differance is in them please

ZEN Performance

That's news to me! All DCCD transfer boxes are the same, regardless of whether they are fitted to a 752 or 754 box (all based on 752 style casing) You can fit any complete transfer box onto any complete front box. I have a DCCD transfer box from a 754 casing fitted at the moment.

mark28

oh well it looked fine when i built it all up. just only prob now is i am not sure i should be using the front diff out off the TY752vbica and my standard type R rear diff along with the DCCD

ZEN Performance

Do you mean diff or CWP? the actually diff unit will be the same, but the ratio on the CrownWheel & Pinion may be different.

With DCCD the ratios need to be the same front and rear, as the transfer gears are 1:1 (as apposed to Euro setup with 3.9 front ratio, 1.1:1 transfer gears and 3.545454 rear ratio).

Paul

mark28

i mean ratios

ZEN Performance

Ratios where, the individual gear ratios or the final drive (diff)? Provided your front and rear ratios match, there will be no problems.

Paul

mark28

[quote=Zen Performance] Provided your front and rear ratios match, there will be no problems.

this is what i am trying to make sure of

ZEN Performance

so what do you want to know? If you took out a 4.44:1 front CWP set, you need to put the same back in, as that's what the rear diff is.

APIDavid

iTrader: (4)

Paul, you can get in trouble with the locating lugs of the 5th/ rev gear synchro sleeve. Some need a specific shape in the case for a certain lug and if it spins out of the position in the case it can jam in 5th or reverse. Good old Scooobysport did that a few years back and we sorted the mess out for the guy.

I'd agree that ' some / most will swap ' but in a home situation rather than a workshop or specialist it might be a bit of stretch for a person trying to do something for himself.

David APi

PS and don't try fitting a dccd to a UK gearbox unless you change the drop gears at the back.

ZEN Performance

the 5th/rev sleeve isn't an issue, what SS probably did was put the gearbox in 5th gear and allowed it to rotate before they fitted the transfer box.

mark28

cheers guys, i know i need the diff set up of 4.44. (to match rear)

i just need to know what the ratio of the diff is in this box ty752vbica
so if its the same i can just use this box. if not i will use my old diff and pinion out of my other box. i would rather use the diff in the box already as then i dont have to mess around with backlash and pre-load.

thanks mark

P20SPD

iTrader: (1)

count the teeth on the Crown Wheel and Pinion, that way you know for show what front diff ratio you have. Then count the teeth on the drop gears to find out whether its 1:1 or 1.1:1.

mark28

all very well, but the diff is still in the box how can i count them. yes i can count the teeth on the crown wheel buy removing the dran plug. but you cant see the pinion teeth

i will just put my old one in the new box which is 4.44. it just means more time and effort

P20SPD

iTrader: (1)

Sorry, assumed you already had the box open.

Your swapping the DCCD yes? why not just open the front part of the box while you are at it, and then count the teeth, if its ok, put it back, if not swap it over?

sorry if stating the obvious

mark28

yes swapping it across, well i have split the box now. but from the start i thought someone could of told me what diff ratio was from looking at the gearbox number

dont worry all i was trying to do was save some time.

thank you all for your help, i will let you know if it all works out ok

also big thanks paul at zen (top bloke) will be seeing you soon

P20SPD

iTrader: (1)

Mark, we probably could have told you the "factory" ratio to be honest, the problem is, doing a swap like that, i would want to be safe rather than sorry, and the simplest way is to actually count the teeth, then you know for sure.

You never really know the history of a used box (assuming you havent owned the box from new)

mark28

very true (safe not sorry)

sorry if i bored anyone with this thread. oh and if anyone was thinking it, yes i am a nugget. lol

mark28

guys you know the selecter rod that goes in the diff case part. (not ones in gear box case) well are they all the same ?? cos me thinks there not

thanks mark

AlanG

I had two boxes overhauled last year (an early and a late box). When i refitted the "early" box i got 1/4 mile out of it before i couldn't select 5th. After stopping, i then tried to select reverse to turn the car around and then get the car back down to the garage, but i couldn't select that either.
The company that built the boxes put their hands up to admit they had put the wrong casing on the box and because it didn't have the lugs, that was why i couldn't select reverse.

ZEN Performance

I think there is more to it than that, since the only boxes I've seen without the floating "thing" for the reverse synchro, have been early 98 boxes. All older and newer boxes have the same thing. i will have a look at one of the 5 boxes we have in for work at the moment, one of them doesn't have the floating thing (it stops the reverse synchro cone from rotating), but I am willing to bet the transfer box still has the lugs.

Paul

mark28

see the prob i have is that 2nd is tight to get and then i cant get first but it is almost as if i cant get the travel across the gate i req

oh well back in workshop tomoz then

AlanG

Thinking about what happened in my case, i assumed the later gearbox without the floating "thing" must have been put on to my early box.
The company that built the early box back up ordered another case and didn't ask to swap the transfer boxes over. The only other thing that might have happened is they put a transfer box from another customers gearbox by mistake but i'll never know now since it was over a year ago.

ZEN Performance

1/2 gate shouldn't be a problem on a dccd box, as only the 5/R position is determined by the sprung locator thingy in the transfer box. If it's not in the car, I wouldn't worry too much, as shifting can often feel stiff until oil is everywhere in the box.

Paul

mark28

all sorted, was the selecter rod at fault, they where differant

really happy with set up. feels like i have just added 100 bhp to the engine
(should of put this thread in projects )