Question About A Gearbox ?

[robert powsey]

Hi, My gearbox recently went. Its a 77-TY754VN2AA model, Does anyone know where i can get one cheap (as they seem to b like rocking horse s**t) or if there is another gearbox that would be compatable for my car? Or would i need to get a different rear diff with any other gearbox?

Cheers

[eureka]

gearbox will need to match diff so different box = new diff

[BrightonMunich]

As it is a TY754 VN code....I assume your car is MY99-00 UK classic?????

Let me know what car it is. You need to confirm that it is running the origonal rear diff as well

Three options

API -only do rebuilds on an exchange basis

Jap Performance - Tend to only have VBs for Stis about 550ish delivered

Grade A Breakers - Tend to have VBs and VNs about 650ish delivered

Grade A def your best bet. Give them the year of your car and the rear diff ratio

http://www.gradea-subaru.co.uk/

Cheers

BM

[robert powsey]

  BrightonMunich said:

As it is a TY754 VN code....I assume your car is MY99-00 UK classic?????

Let me know what car it is. You need to confirm that it is running the origonal rear diff as well

Three options

API -only do rebuilds on an exchange basis

Jap Performance - Tend to only have VBs for Stis about 550ish delivered

Grade A Breakers - Tend to have VBs and VNs about 650ish delivered

Grade A def your best bet. Give them the year of your car and the rear diff ratio

http://www.gradea-subaru.co.uk/

Cheers

BM

hi its a 2001 bugeye and as far as i'm aware the diff is standard as is the box ??? what's the best hard wearing 5 speed box that will cope with about 350 bhp as there so many different boxes out there its so confusing as to what to go for ????

[BrightonMunich]

  robert powsey said:

hi its a 2001 bugeye and as far as i'm aware the diff is standard as is the box ??? what's the best hard wearing 5 speed box that will cope with about 350 bhp as there so many different boxes out there its so confusing as to what to go for ????

OK with that code that makes sense. The TY754 box that you have is alot stronger than the eralier TY752 and can handle 350bhp... but you are begining to get towards the top end of what it will take probably(some boxes are just stronger than others). It is not Bhp but torque that destroys boxes. So if you are running under 350lbs torque you should be fine on that box - just find a replacement.

To go for a 5 speed bullet proof box - you need to for a PPG box (wjicj you can get in Straight cut or Helical cut gears)

This however will cost a few 1000.

So it depends on your long term plans for the car....if you are going for big bhp and therefore big torque PPG is the only way. If you are keeping things the way they are - prob best to go for a TY754 VN replacement. Depends on what your current torque figure is???? (I am running 340lbs of torque through a TY754 - I can switch the map to push 400lbs through it....but have the feeling it might let go fairly quickly if I did this)

(You would need a TY754 box anyway for the PPG conversion - of you go that route. As they use the casing and replace the gears inside)

Any TY754 VN should fit your rear diff.

TY754 VB are sti - some say they are touch stronger.....many think there really is nothing in it - plus it wont be compatible with the final drive or your current rear diff.

Edited March 13, 2009 by BrightonMunich

[robert powsey]

  BrightonMunich said:

OK with that code that makes sense. The TY754 box that you have is alot stronger than the eralier TY752 and can handle 350bhp... but you are begining to get towards the top end of what it will take probably(some boxes are just stronger than others). It is not Bhp but torque that destroys boxes. So if you are running under 350lbs torque you should be fine on that box - just find a replacement.

To go for a 5 speed bullet proof box - you need to for a PPG box (wjicj you can get in Straight cut or Helical cut gears)

This however will cost a few 1000.

So it depends on your long term plans for the car....if you are going for big bhp and therefore big torque PPG is the only way. If you are keeping things the way they are - prob best to go for a TY754 VN replacement. Depends on what your current torque figure is???? (I am running 340lbs of torque through a TY754 - I can switch the map to push 400lbs through it....but have the feeling it might let go fairly quickly if I did this)

(You would need a TY754 box anyway for the PPG conversion - of you go that route. As they use the casing and replace the gears inside)

Any TY754 VN should fit your rear diff.

TY754 VB are sti - some say they are touch stronger.....many think there really is nothing in it - plus it wont be compatible with the final drive or your current rear diff.

hi buddy will a ty754 vn5aa be ok with the original diff ???

[BrightonMunich]

I would be suprised if it didnt. Unfortunately I dont have my gearbox code info here.

You might find it here

http://spda-online.ca/modules/tinycontent/rewrite/tc_28.

OPTION I - Get someone to fit it

Email David at API I am sure he will give you the info on your the spec of your diff and a price to swap your old box for one that works

http://www.apiengines.com/contact.php

OPTION 2 - Fit it your self

Call Grade A subaru - give them the exact model of your car UK 2001 bugeye and they will provide a box that will be compatible with your rear diff. I have had very good service off these guys recently...next day delivery.

(If you are in kent - And want someone to fit it - I know a very good subaru/evo mechanic that does private work - PM me - or if you have the tools space yourself fair enough)