lozi

looks like i tryed to preach to the wrong person lol

i know the company you mean i think mate, am i allowed to put my companys name without being accused of advertising lol

Twellsie

iTrader: (1)

should be cool, i would have thought, bu if you are concerned, pm me

lozi

its quite expensive to get the whole box peened, plus you need to get it dismantled then reassembled. Im not sure exactly how much though tbh

and yes its definatly worth getting the diffs done as well.

superfinishing on the gears is also well worth it, after peening you can get your gears superfinished which will take all even remotly sharp edges off them and they come out looking chrome. Gear changes would be ultra smooth after having this done.

mechanic28

iTrader: (5)

whats the point of having a 4x4 if you can not give it large from the lights!


rwd rules!

JTECH James

iTrader: (13)

ah but in a 4x4 you actually move forward in the wet

which in the uk is 90% of the time

mechanic28

iTrader: (5)

for me

JTECH James

iTrader: (13)

jona bona

Iv jus had to have mine rebuilt as i snapped the main shaft. That was the original box from new so dont think its done bad as its bin running 330 bhp since 2002 and the last year has bin running 382 bhp and 380 lb/ft of torque

RWD_cossie_wil

iTrader: (9)

It is an unquantifiable question, your gearbox might be in perfect condition having been very close to tolerance on manufacture, and lead a well serviced gentle life, so could take a few years of decent power/torque, or it might have had the shit kicked out of it for 12 years without an oil change, and explode 3rd gear next time you give it the beans ...

Personally, when I deceided to go 400+ BHP/Lbs Ft on my Escos, I decided I would make the car bulletproof around that, there is no point having the power if the car can't handle it. IMHO you only need to break 2 standard boxes and a big tooth box will have paid for itself...

instead you could sell your good working box for 3-400 quid, and buy a rough one to get converted to a BARA gear kit, which is approx 3k built up ready to go.

Consider if you break two boxes, you have all the hassle of getting recovered, getting the box out, repaired or replaced and loosing the car for a while, instead of just biting the bullet, spending a bit of cash upfront to keep the car reliable. A good 4x4 gearbox will return 80-90% of your investment should you ever sell it as long as it is in good condition.

Wreck and replace is a hugley false econemy in my eyes, built it once build it right and enjoy the car without fear of breakage

dojj

iTrader: (3)

4 rebuilds, 4 boxes gone to the scrapyard in the sky, finally got some quaife internals, ble the engine up 3 weeks later

all with around 350 lb/ft

if it won't last behind the tt24v i'll consider going rwd to save a few grand

dom123

iTrader: (1)

anytips on how not to lose your girl friend and having your parents not think youve gone mad spending Ł3000 on a lump of metal on a pallet ...lol

ill keep it on the low when i buy one...

Cossie92

Have anybody used uprated std boxes like the ones G.E.A.R.S do?

http://www.gears.tv/products.html#

I take it this gearbox still run stock gears so would it still be prone to bang the 3rd gear which seems to be quite common?

Cossiemainful

iTrader: (1)

Acc. to the datasheet the MT75 can take max. 300 Nm and weights 35 kg. So it is near on the limit with a standard cossie. So even stage 1 will top the limit of 300 Nm.
SQS Racing made Synchro kits too for the MT75. I'm considering a longer 5th gear kit (298 Km/h) for just about Ł1452. The stronger SQS kit will fit plug & play on a MT75.

Cossie92

No one has any experiences about these gearboxes?

Jay,

iTrader: (4)

A mate of mine has had 3 of them 3 rd gear out as per the second shat secound out at low speed so far the 3rds ok at 450bhp

Jay,

iTrader: (4)

just to add when i have done the 2 boxes i have ill be going 2wd lol

Cossie92

Okay I was just wondering if it was worth it to buy uprated standard gearbox for 350-400 bhp but it doesn't seem to be significantly stronger as it still uses the original gears. I guess nothing else than straight cut gears help the MT-75 to take realiably 400ish bhp.

But if anyone happens to have experiences on running uprated std gearboxes I'd still like to hear what kind bhp and abuse your boxes have taken.

Jay,

iTrader: (4)

put plenty of barra boxes in cars when they first came out and did well Dome seem to be the only company that offer a helical gearkit to take 400+ ish so its quiet though . I have racked my brains to find a good solution to this and although i might never break my 2 mt75s BUT its niggling at me so im going to get the bits to go 2wd for when it happens

Cossie92

Yes I've also heard Bara gear kit is reasonably quiet. Fixit gearset is also pretty quiet. It's a swedish company and many Cossie owners here in Scandinavia are using those gears. They use forged helical gears and some guys are using those gearboxes on 500-600 bhp cars.


Sounds pretty quiet but what I've read, these cost a small fortune.

m19rcj

Has anyone tried cryogenic treatment to the gears, I hear this increase the strength somewhat?

Caddyshack

Are the bara big tooth boxes quiet...I.e. how do they compare to the std box? If I can get one for around 3k that has got to be worth it, especially if I go for a twin scroll and close to 500 bhp, its a lot to spend but I think my 205 with 4x4 and under a Ton will be mad with 500bhp?

Jay,

iTrader: (4)

but you still end up with the small teeth on the box just more brital ! think the only way forward is a big tooth kit but the price isnt worth it at all so might as well go 2wd

Caddyshack

Hi Jay, I do not understand your answer, are you saying that the big tooth kits are worth it or not?

Jay,

iTrader: (4)

they wont break as the finer smaller tooth standard gear do but shit 4k for a good kit is fuckin daylight robbery

edited previous reply sorry

Caddyshack

Thanks...makes sense now, I thought someone said bara were 3k? My car runs somewhere in the 330 to 390 region and has done 36,000 miles without breaking but wonder how long it will last once it sees a few track days although I do not do hard launches....I just don't see the point in a big power car but being afraid to gun it....breaking down would be a pain! If 3-4k fixes it forever and allows me to drive hard the I may beup for that....trouble is does it just pich the problem further on ie then doffs and drive shafts etc.....I guess you want all four wheels to spin up or 2 with open diffs and deal with the torque that way. My AMG had 500 bhp and 500 lb ft with a massive box and that had to have the torque converter rebuilt at ig cost!

Jay,

iTrader: (4)

Sounds like your in the same ball park as me power wise mate and yes will the gearbox last lol ! Im all about reliability these days rather than power and i dont really want to change the cars drive train purely because its a 4x4 and all these cossies are getting rare now so its a shame to mess to much with it but at least its a easy change to put it back to standard

Just to add id would stay away from the cheaper 1.5k kits as there badly finished so by the time you get it all done and finished you might as well buy a tried and tested one

Cossie92

I guess hard launches don't break the gearbox itself but diffs and driveshafts? So even without hard launching, I think you can break the gearbox teeth when shifting under hard acceleration.

Jay,

iTrader: (4)

torque load in 3rd gear the box seems to not break as much if you get speed up in second so you get past peak torque in third

Fil

I found out 380bhp into 3rd at around 7000k breaks it


I belive smit has a standard mt75 that's been tweaked, can't remember what tho? that he gives some stick to and its not broke.

anglia105e hinson

Dark chocolate hahahaha quality!!


Yeah mines fine too lots of hard launches

Paul_RS

iTrader: (4)

Bara box in my car. I find the exhaust more annoying TBH.

Jay,

iTrader: (4)

its a cts shot peened and super finished box in that Fil spoke to bernie the other day

Fil

so is that standard gears and box, thats just been made stronger via shot peening? and how much is that then ŁŁŁŁs

Jay,

iTrader: (4)

if your gears are serviceable Ł450 to treat them and then bearingect rebuild back could another Ł500

Fil

ive got a box, with 4 decent gears left

but looks like Ł1000 then to have a standard box strengthened

Jay,

iTrader: (4)

but only by 15% so IF the box is rated at the most 300lb then its only going up to 345lb at the most so is it worth the money

Caddyshack

That sounds really nice.....I think the wallet is coming out

Fil

ah! not to me it ain't

Jay,

iTrader: (4)

exactly 2wd lol at least ill die a bit quicker

Fil

oh dear,

I think ill stick to my current plan, keep a spare Mt75 box or two! easy for a quick swap!