new gearbox

[jozefsan]

Hi everybody
Just spent a grand on passing an mot and got told the clicky, fluttery noise is probably the gearbox going out. Do you have any advice on the cheapest option I have at the mo to sort this out? Could I get a second hand one etc? How much?
Thanks guys/girls
James

advice: go in garage where they dont use word probably

[nucleustylzlude]

clicky, fluttery noise

It could be driveshafts?

/\ Give it a test in a wide open space, full lock and go around in circles see if you feel a knocking or hear a clicking noise. Try both directions. An easy check. Or...

It could be the release bearing for the clutch showing signs of wear. Which is still a gearbox off job to replace, and worth changing the clutch while you've paid for the labour to remove the box.


That is an odd description though, I agree with Jozef take it to someone else who can diagnose it a bit better than scaring you into something as drastic as a gearbox on its way out from a noise. To be fair, you don't hear of manual boxes failing on these cars, only the sycromesh wearing and creating very notchy gearchanges or worse gear crunches.

Is it selecting the gears ok when driving?

[itchygreek1]

clicky, fluttery noise

It could be driveshafts?

/\ Give it a test in a wide open space, full lock and go around in circles see if you feel a knocking or hear a clicking noise. Try both directions. An easy check. Or...

It could be the release bearing for the clutch showing signs of wear. Which is still a gearbox off job to replace, and worth changing the clutch while you've paid for the labour to remove the box.


That is an odd description though, I agree with Jozef take it to someone else who can diagnose it a bit better than scaring you into something as drastic as a gearbox on its way out from a noise. To be fair, you don't hear of manual boxes failing on these cars, only the sycromesh wearing and creating very notchy gearchanges or worse gear crunches.

Is it selecting the gears ok when driving?

In my case my gear changing can be clunky what is the sycromesh? is this a big job to be fixed?

[wurlycorner]

Syncromesh is the mechanism inside the gearbox that automatically matches the rotational speed between the input and output shafts.

Simply put, it's what the gearbox does so that you can just dip the clutch and move the gear lever straight from one gear, to another.


Without syncromesh, you'd need to do it the old skool way: dip the clutch, move the gear lever into neutral, lift the clutch, manually match the engine speed to the roadspeed for the new gear, dip the clutch again and instantly move the gear lever into the new gear while everything is still spinning and then lift the clutch


(with syncromesh you can actually do away with dipping the clutch all together by manually matching the engine speed to roadspeed, but it wears everything out much faster!)

[nucleustylzlude]

As for fixing it, its a gearbox off job, then dismantle the inners of the gearbox to replace the synchromesh (which probably costs a bit for the part on its own). If you saw the amount of cogs and pieces to remove it would scare anyone. @4thgenphil might have a pic handy to do just that?

If it was this, the lower cost option is to buy a replacement gearbox. But...

Clunky might not be that bad, its when you get the reall grind and crunch changing from one gear to another (with the clutch depressed like a normal gear change).

Another solution to see if it helps the gearbox is something like Amsoil MTF:
http://www.opieoils.co.uk/p-1051-amsoil ... d-mtf.aspx

But I'd try to source the noise first, assuming it is the gearbox making it (check those driveshafts as suggested), check the noise when you press down the clutch to see if its the release bearing and then start thinking about the gearbox issues.

[4thgenphil]

I dont have pic's with me as I am away.
To change the synchro you need specialist tools, I made some of them but not all of them. Itll be cheaper and easief to buy a 2nd hand box.

[Merlin]

is this a big job to be fixed?

Like nucleustylzlude says the gearbox needs removed which is a couple of hours work itself. IMO you would be looking in the region of £300 - £500 in parts and labour for working on the gearbox innards alone. Also whatever you do it would be worthwhile in fitting a new clutch while you are there, unless you have had one fitted recently. So very rough maths is £200 for the gearbox out/in, £400 for gearbox work, £170 for a new clutch and fluids.

I payed £200 for a gearbox specialist to install a diff, and that didn't involve them taking the gears apart.

[wurlycorner]

I dont have pic's with me as I am away.

You could do a demo, by taking apart the gearbox on that track lude you've just had shipped out to you?