gearbox
Turbo Mini Forums

my gearbox is buggered to put it lightly. where best or whos best value for money for straight cut gearbox and what type do i go for. also might buy primary gears as using standard at mo. any help guys much appreciated. am tight budget so whats best. will be gettin my dad to build it so kit would be best as cheaper option. 3 or 4 syncro etc? ?

mini spares do a good set aperntly.
evolution clubman set i think its called?
also i think youll want 4 syncro tbh.

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

sc clubman gear set
sc drops
4 pin diff

all minispares, you shouldnt go wrong

always looking for them bigger bunches of bannanas

If youre on a tight budget, I wouldnt bother with a 4 pin diff, just a competition diff pin.
If Miglias do OK with just a competition diff pin, then Im sure you will too.
Paul

I seriously doubt it!

gosh rthats encouraging paul ,i was about to go 4 pin on mine ,maybe ill see how it goes ,whats the power on the migs ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

More importantly, what torque do the miglias make? and how many miles do they do in between rebuilds?!

I personally would not consider building even a NA 1293 without a cross pin diff, let alone any turbo lump, after all they are only £150 (ish?) these days, the first time the diff shits itself you are faced with spending that much on gaskets, seals, diff pin, and a new oil pump.

Agreed .... anything much above a NA 998 and I consider a 4 pin diff essential.

Every day is a school day ...........

How fast and how expensive ...... the same question...

ive already got the mini spares diff in the current gearbox which is shagged. its brand new done about 150 miles. i just need a new gearset. any reccommendations.

I personally like the quality of the Tran-X stuff (Min-Its sell it) .....

Every day is a school day ...........

How fast and how expensive ...... the same question...

minispares clubman set

and what the lads say above ........whole hartedley

i have a tran-x in mine

hoggy built it and i think he said it goes together very nicely

yes it did wolfie better than the clubman set but the clubman set is still bloody good

always looking for them bigger bunches of bannanas

I didn't think they did? They certainly didn't use to?

i think they can only run comp diff pins if i remember right.

but remeber they dont have the huge torque spike like turbos do.

plus they are stripped all the time and things like the diff pin are replaced frequently.

the main week point is not the pin itself but the roll pin which holds it in.

these will snap if you are bunging huge bannanas and curly wurlys through them.

ask a certain person on here he can vouch for that after a few craked and wreked the box and contents.

soon as we shifted to a 4 pin no probs what so ever.

always looking for them bigger bunches of bannanas

in the rear beam convo theres a pic of a miglia with a turbo engine though , i think jim put it on ,does this mean that has a single pin diff ?
also hoggy ,do you think that the roll pin came out cos the planet gear welded itself to the pin due to lack of lube ?
or lots of wear ,?
and so made the cross pin rotate and snap the roll pin s ,

looking at it ,if the gear is sliding round the pin like it should ,thered be no force on the pin to speak of ,,also would tapping a threaded bar in were the roll pin goes make it all last more ?
what do you think ?

regards robert

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Thanks for all your comments guys, ive looked at clubman set and all the min its stuff as they seem very good as ive dealt with them before. they seem really nice guys. As ive never bought a gearbox before are they all the same ratio as standard gearbox unles they are stated close ratio straight cut. I dont want the close ratio, Ijust want a a straight cut gearbox that will take the power and have same ratio or very similar to the standard box i had.

Aso when it comes to the drop gears i havnt bought these before they do in sizes 1.00 1.04 1.08 i think that wat it said that without checking but yea what does this mean, i no it means different ratio, but what does it do in terms of accerelaration and top speed, again i just want standard size drop gears but in straight cut, what ratio are they.

Thanks for your help this all basic info but im never had to buy gearbox stuff so im not so sure on standard spec to unprated stuff so best to check. much appreciated.

As far as I know all the straight cut gearkits are close ratio. What this effectively means is that first gear is longer than standard, top gear is the same as standard, and all the rest are closer together. If you keep the same diff ratio then you will still have the same top speed, you will be able to go faster in 1st gear than before, and then when going up through the gears the engine revs will not drop as much as before.
Trust me it makes the car better to drive and faster, you will not regret a straight cut close ratio gearkit.
As for drop gears, the standard ratio is 1.0:1 so these are the ones to go for. The 1.04:1 and 1.08:1 drops are really intended for competition cars as a means of easily fine tuning the final drive ratio without having to strip the gearbox.

Thanks tom thats what i wanted to here. Something clear and its covered what i need to no. You learn something new every day i had no idea that close ration just means the middle gears are closer which make it better any ways. so all the kits should be the same as one another. before i chose which oone ill check on here first to make sure.

And as for drop gears just go for standard 1.0.1

Thanks alot mate

Thanks mate thats what i needed to here. You learn something new every day. Had no idea that the close ratio sets just mean the middle gears are closer. Should i have known that ha ha . But ta very much, ill ask everyone when i chose what set to buy to make sure they are ok just double check. I've got a 2.95 diff so that will work well with the box.

And as for the drop gears i just stick with standard size 1.0.1 cheers again thats all i needed to no.

thanks guys


oppppppppps sorry about that i went back on the first reply whilst typing it and then i went forward to look again and it wasnt their so i had type another reply then click enter and checked and both were their. sorry

Edited by mattyking on 26th Mar, 2007.

There are some slight differences between the ratios, but nothing to worry about really. Go for either Minispares Clubman kit or the Min-its Tran-x kit and you shall have no problems.

Personally I have the Min-its Tran-x gearkit, 1.0:1 drops, and X-pin diff in my gearbox.

There are some sets of SC gears that only replace 2nd to 4th as first is straight cut anyway, they might help if you want to keep a very short first gear.

I must admit that I would do everything in my power to avoid fitting an SC gear kit in a daily driver, the noise is really annoying on long journeys.

For a track car or a weekend warrior then I'd go for the SC CR kit from Tran-X as the closer ratios really do improve the car when driven in a spirted fashion.

If I had to fit a SC gear kit to a road weight / spec car (full trim, 4 people in it and 4 crates of beer, 2.9 or so final drive for cruising ability etc.) then I'd go for the kit which retains the standard 1st gear (which I would think about replacing ..... certainly inspect closely before refitting). I have known a couple of low compression turbos really struggle to get off the line, especially on steep hills, with the CR gear set.

Every day is a school day ...........

How fast and how expensive ...... the same question...

ok cheers for that ill have a look this afternon then all i need to do is find a way of paying for it. hmmm. ha. but yea thanks alot. at mo i have minis spares x diff.

Just read you post roger. I no its a daily driver and i would prefer normal gears but tthey not strong enough people say. Or are they it would suit me better not to buy styraight cut as price is cheaper also.

Edited by mattyking on 26th Mar, 2007.