Lost all drive snapped driveshaft
Turbo Mini Forums

Guys, i just broke it again.. Rough spec is straight cut drops, RTS clutch, straight cut remote box, quaife atb, pot joints. All done 1700 miles, accelerated briskly away in first and lost all drive. No nasty noises. Engine sounds fine. Drop gears go quiet and loud as i dip the clutch as usual. I can select gears and try to drive off, the speedo moves, the wheels dont.
Thoughts please

Cheers

Edited by dazibee on 10th Apr, 2016.

This is what mine did at imm spent a full day on it to find out it had snapped a shaft inside the pot joint.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

I would be pleased if thats all it is. Im thinking pinion nut maybe come loose, but it was very sudden. No grawnching noises. ATB is meant to be bulletproof so possibly not the diff then. Yea driveshafts makes sence. With a Quaife if one wheel loses drive does the other lose too?

I reckon pinion maybe. If a pot joint had gone with the lsd it would possibly limp

Tbh I thought it was the nut and striped the hole engine out,

The shaft had snapped inside the pot joint,

It may be worth starting it up and have someone look at what the shafts are doing when you try to pull away.

As if I had done this I would of seen them spinning.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

as its got an atb it should still move if a joint has gone?

I reckon the pinion nuts come and the pinion slid out of mesh, think this happened to Jim once?

I think Si has an ATB and his didn't go.

If something is worth doing, it's worth doing half of.

Edit: helps if i read all what you put before posting lol

If everything is working enough to make the speedo go it must be from the pinion onwards

Edited by Brett on 27th Mar, 2016.

Yes i moved to the darkside

Instagram @jdm_brett

I'm not overly sure on how the gearing in the ATB actually works, but I do know that they can be used on an independent brake roller test. I also know that you can turn one wheel while the other is stationary. The ATB doesn't totally lock up like some LSD's do

You cannot drive on one shaft with an ATB. A plate diff depending how the pre load is set yes you can drive on one shaft.

I've snapped a shaft in the boot before.

Same symptoms.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

^
Which is why if you use one on something fwd and lift a wheel, you lose drive, which is a bit of a pisser for circuit use.

This is the same principle as tge Quaife ATB

https://youtu.be/lZmsY2YvVsc

John was there when I did my shaft, would do 60mph and go no were, yet I have an ATB.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

Edited by Sprocket on 27th Mar, 2016.

Some makers of TB diffs can add some plates in the middle that do actually pre-load the unit, which in theory should mean the diff always has the ability to drive, and transfer drive.

Wavetrac offer this and I did change my own car to this last year. Havent had any hard usage out of it yet.

But my old Ford Racing Torsen would very much spin one wheel on tight corners, and occasionally on some not so tight corners. Although towards the end of it's life I'm sure it had issues....before it finally exploded LOL.

As to what is best, really personal preference. I'd imagine the ATB much easier on the arms and safer...plus it should never wear out.

Is it the ultimate "racers" diff....probably not.

Some do lift fronts...and rears.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

^ you dont need anymore power on the ground if it already does that, unless you fancy testing the roll cage

This is very odd. So.. In the garage with car on the ground i can push the car in gear and look through the clutch cover and see the clutch is not turning.

I can jack it up and in gear can turn each front wheel and the other one turns too so no broken driveshaft, but i i can also see the clutch is not turning still.

Throughout all this i can hear a clicking noise.from the clutch area if i rock the roadwheel back and forth.

I take the clutch cover off and put a spanner on the flywheel bolt and now seeing the roadwheels turn normally. I can spin the roadwheel and the flywheel turns a bit then stops, while i am still turning the roadwheel. Strange. I am now waiting for the flywheel to pop off so i can have a proper look

Ive seen the bolts holding the clutch center shear, or come loose and drop out. One of oyr club members lost all drive on tge motorway, pulled onto the hard shoulder, could select all gears but no drive. Switched off the engine and then couldnt restart it....... the clutch centre bollts had come loose and fallen out

Interesting. We had a flywheel spin loose once which had enough grip of the crank to let it start but not enough to let it drive. Will be interesting to see what you find when it is opened up

Interesting. Sounds like a clutch problem.

Although I wouldn't discount the shaft. Grab one and try and move it about. The boot could be transferring the drive with the car off the ground.

Well I had convinced myself the drivers side driveshaft had snapped. I looked at the pot joint, rolled the car and was sure the pot joint was not moving. Jacked it up and now the pot joint moves. Will investigate tonight

Didn't someone on here have drive problems with a pot joint cage assembled backwards? When on the ground, the balls could disengage, but jacked up, they just about made contact?

Although it does sound like the clutch, before you pull it, when the car is rolled on the ground and in gear, does one of the pot joints rotate the wrong way?

i had a pot joint issue with the cage arse about and the car barely had drive when on flat ground then if you threw it into a corner ie body roll/suspension travel it lost drive and the balls fell out i doubt its your problem however

feel where the inner components are threw the rubber boot with it on the ground makes this issue apparent its easy to feel and know its not where it should be