ok people i have a subaru wrx sti my95. i have been throught quite a few gearboxs in the last 2 years i fitted a uk box last time which has actually lasted a while compaired to the normal sti boxs, but last week i dont a donut just messing about as it started to whine. so stopped straight away, but now even if i drive slowly and come down the gears you can hear it whine so i guessing its on its way out again.now is there another stronger box out there which would take say 330-350bhp without killing my gearbox, my mate has a 5 speed ty754 in his sti running 343bhp and no problems at all.i cant really afford to put a 6 speed or ppg gearbox in so looking for another box that maybe a little stonger than a ty752 sti box any advise would be much appriciated

 

I've ran a sti box in mine with 450 bhp and its lasted very well no whining, have you checked the oil level? Or if its contaminated with water?

 

No idea how the box will get contaminated with water! The TY754 boxes are stronger. If you can pick up a TY754VN4AA out of a blobeye wrx that would be the best option other than that a TY754VN1AA or 2AA out of a late classic would be the next option. Both use 3.54 rear diffs so you would need to check what you currently have fitted and if needs be change the rear diff to match. You shouldnt pay more than 300-400 for the above. I used a TY754VN4AA in my race RA when it was around 400bhp with a 2.5 and I was not mechanically sympathetic with it and it was still perfect when i removed it.

 

A late v5-v6 classic sti 5 speed will cope with that. The code is TY754VBAAA.

Its also fitted to the p1, you will most likely need the rear diff to suit as its got a 4.444 final drive

 

Perhaps it's you

TY752VB4AA 320+ bhp no issues and plenty of abuse munched a clutch but box is great.

 

I have been through two TY54 gearboxes before putting in a six speed, always ends up more expensive to keep breaking boxes. It's easier to get the right gearbox and not worry about it

 

this would have done you -

http://cgi.ebay.co.uk/ws/eBayISAPI.d...#ht_626wt_1141

 

Torque kills gearboxes, not BHP

Tony

 

well my TY54 box lasted 3 weeks before stripping 3rd gear, car has standard engine V3 STI and the original box lasted almost 3 years of ownership by me although whining alot

now im deciding what box to fit again

 

I dont think you can mix and match 754 and 752 gearsets and certainly not in a 752 case

 

im using a 752 gear set and case but with 754 uk 5th. works a treat

 

i had an ty52 sti version 4 box which took 350bhp all day long i just dont think they like to be abused but then what drive train does

 

all of the 5 speeds are there or there abouts in capacity, so you'll just break them all. option would be 6 speed or ppg build, not cheap though

 

ive bust loads of gear boxs. i did no a web site that did rebuilds but with there own stronger gear sets for 752 nad 754, can not remember what it was though

 

found
http://www.gears.tv/products.html#
i will be probs be using them when my latest gear box dies