Thread: Series 3 Gearbox Question

Originally Posted by tangus89

The main concern I have is that the input shaft has a little bit of wobble in it. fractions of a millimetre but wobble nonetheless, is this normal?

How long does a rebuild usually take? I have all the tools and a big work bench available.

cheers

The wobble is most probably because the flywheel end of the shaft is not supported in the flywheel bush; so it should be OK.

If you have all of the parts, a day should see it removed; cleaned; stripped; inspected; reassembled and possibly back in the car.

Are you sure you have all of the parts though? You might need: syncro hubs; bearings; seals; speedi-sleeves; gaskets, or liquid gasket; detent springs; new shafts and gears; bushes; fasteners; dowels for the main-shaft; oil; etc.

Some of these things cannot be inspected before disassembly,

Cheers Charlie

stick the spare in
rebuild the original
swap it out

inspect and repair the spare as required now youve had a chance to run it and assess its suitability for its planned use as a spare

I can get a full rebuild kit tomorrow and that includes everything apparently, syncros, bearings, seals, syncro springs etc etc.
Ok if that wobble isn't too much to worry about I will just do what Dave suggested and rebuild the original.

I'll report back with progress when there is some.

AULRO is awesome.

cheers

Id call that an overhaul kit not a rebuild kit..

rough ball park the box will run ok with about 1-1.5cm of total movement at the input shaft spigot but it may kick 4th and might be noisy in 1+2.

the nose movement is "normal" because of the way the bearings are setup. the shaft is quite long and is cantileverd off of the input bearing, the shaft bearing that sits between the input and output shaft is not supported directly but gets its support from the next bearing in line. (the outpur shaft bearings)

its a long way from the spigot to the front bearing and only a short way from the front bearing to the input/output shaft support bearing. a little movement there looks like a lot at the spigot.

Cheers Dave

yeah looking at my manual I can see what you mean and a bit of play makes sense. There isn't anywhere near a cm of play so hopefully it should be all good.

I need to clean up the selectors and swap the overdrive and gearstick to the spare setup and it should be ready on the weekend.

Thats what happened to the current box, it started kicking 4th, then all the other gears, then it when bang spinning 33's on gravel. At least the 6 is working beautifully.

It will probably stop working now I have said that