Calling all Gearbox Gurus

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Oct 20, 2015 | 03:33 PM

barchud

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Joined: Mar 2008

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Calling all Gearbox Gurus

Hi there, I'm looking for a bit of advice on whether a TY757VBBAB gearbox will replace a TY757BAAB please? The difference in the model no seems to relate to the BBAB having a dual cone synchro on first whereas the BAAB doesn't. Everything else seems right with gear ratios and mounting points etc.

Does anyone know if I can just slot it in, or will I need a new gear selector too, or is the whole thing just a bad idea please?

It's for a 03 Legacy GT twinsrcoll (BP5 EJ20Y).

Oct 20, 2015 | 04:13 PM

4u2nv2

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Joined: Oct 2010

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if you have checked the difference and the only diff is the syncro then i would say it will go straight in.
just checked they are the same. direct replacement buddy and a better 1st gear syncro, bonus....

Oct 21, 2015 | 10:11 AM

Anko Dragt

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Joined: Oct 2015

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From: Hoorn (NL)

Code:

Car                             BOX nr          1st     2nd     3rd      4th     5th         rev  transfer ratio    end ratio  centerdiff-type
JDM Legacy 2.0GT MY04 
(also US Legacy 2.5GT)	        TY757VBAAB	3.166	1.882	1.296	0.972	0.738		3.333	1.000	4.111	Viscous (4kgf)	Open	
JDM Legacy 2.0GT spec B MY04	TY757VBABB	3.166	1.882	1.296	0.972	0.738		3.333	1.000	4.444	Viscous (4kgf)	Open	
JDM Legacy 2.0GT MY05	        TY757VBBAB	3.166	1.882	1.296	0.972	0.738		3.333	1.000	4.111	Viscous (4kgf)	Open

BBAB does indeed have different 1st gear synchro.

Should not be a problem.
BABB will NOT fit, Well it does, but the final drive will be wrong.

Last edited by Anko Dragt; Oct 21, 2015 at 10:13 AM.