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post #1 of 11 (permalink) Old 11-15-2010, 09:23 AM Thread Starter
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Forester transmission codes

http://members.iinet.net.au/~wearne/...ns%20Specs.pdf

What I would like to know is the missing info for a TY755VB1AA gearbox

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post #2 of 11 (permalink) Old 11-15-2010, 09:33 AM Thread Starter
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and what else could fit

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post #3 of 11 (permalink) Old 11-15-2010, 12:01 PM
Don, King of the parts diagram
 
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The TY755VB1AA box is also fitted to the MY99/00 Aus turbo Forester. (Destination Code KA for Australia)

http://opposedforces.com/parts/fores...sion_assembly/

I would imagine it has the same main ratios as UK S-Turbo but without the oil pump.

Drop down gears would be 1:1 and 4.444 front/rear diffs.
Attached Files
File Type: pdf MY015MTspec.pdf (22.5 KB, 172 views)

Was a MY03 FXT 5MT (280bhp/290Lbsft)
Now a MY11 WRX STi 4door (342bhp/360Lbsft)
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post #4 of 11 (permalink) Old 11-15-2010, 02:30 PM Thread Starter
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Good work fella


so

3.454

1.947

1.366

0.972

0.738

front and rear 4.444

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post #5 of 11 (permalink) Old 11-15-2010, 02:34 PM Thread Starter
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Does that mean that only gearboxes with the FD of 4.444 will fit

and that the gear ratios determine how the car drives in terms of a higher top gear for instance

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post #6 of 11 (permalink) Old 11-15-2010, 02:51 PM
Don, King of the parts diagram
 
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Fitting any other G/B would mean swapping out the rear diff as well.

Most (if not all) UK 2.0L Impreza boxes are 3.900 front: 1.1 drop down: 3.545 rear.

Was a MY03 FXT 5MT (280bhp/290Lbsft)
Now a MY11 WRX STi 4door (342bhp/360Lbsft)
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post #7 of 11 (permalink) Old 11-16-2010, 01:20 AM
Don, King of the parts diagram
 
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Assuming all my info above is correct another way to retain the 4.444 diffs would be to obtain an S-turbo G/B and then (depending upon whats wrong with yours) swap your transfer casing over to retain the 1:1 drop down gears.

No rear diff swap required.

Was a MY03 FXT 5MT (280bhp/290Lbsft)
Now a MY11 WRX STi 4door (342bhp/360Lbsft)
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post #8 of 11 (permalink) Old 11-16-2010, 01:55 AM Thread Starter
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Thats what I thought

looking at that chart there are a few JDM Imprezas with 4.444 final drive, just not sure if thats the same front and back?

My gearbox is getting a bit notchy, especially 3rd to 4th, OK if you take your time, but not snickity click / knife through hot butter smooth.

Just weighing up options of a future replacement / rebuild / cost etc

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post #9 of 11 (permalink) Old 11-16-2010, 01:56 AM Thread Starter
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Rear diff swap or / and front diff? if UK box fitted?

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post #10 of 11 (permalink) Old 11-16-2010, 03:47 AM
Don, King of the parts diagram
 
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As per pdf above, the UK S-Turbo G/b comes with the 4.444 front diff, 1:1.081 drop down gears and a 4.111 rear diff.

If you re-used your transfer case that has 1:1 drop down gears, then no rear diff change.

If your box is just beginning to get notchy from 3rd to 4th then initially an oil change to Castrol Syntax or even Redline Shockproof light (Smurf Blood) can produce excellent results.

I changed mine at 85K to shockproof for that reason and had no problems after, 120K and still going strong. (although not with me anymore).

Was a MY03 FXT 5MT (280bhp/290Lbsft)
Now a MY11 WRX STi 4door (342bhp/360Lbsft)
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post #11 of 11 (permalink) Old 11-16-2010, 04:46 AM Thread Starter
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ahaaaa

the cheaper alternative first methinks

cheers ill try the redline, and report back

thanks Don

Nich

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