Gearbox - Loud Bang

[SiFi]

Got my 77 spider on the road for the first time this summer (Melbourne, Australia) and driving beautifully for a few hours on country roads until I geared down at a T-intersection. I had the stereo pretty high but heard a loud bang underneath in the gearbox and then I had no acceleration in any gears, well virtually none. I can drive the car at a max of 15kmh in 1st, but thats it.

The clutch seems fine, engaging as usual, the gears still move freely, but there's a slight whining underneath. Basically cant go anywhere.

Any suggestions as to what might have happened?

Am I up for a complete overhaul?

Cheers//Simon

[thefiatek]

Ummm...... that really sounds like the clutch. Pull the tranny regardless. Unless you broke the input shaft gear, which I've only seen once in 25 years of working on these.

[124JOE]

im up for a guess
i had a cracked case.it was between the top shaft and the output shaft
it gets HOT and it whines but i caught it quick

neen a new case/berings
hows your gubilo thing?
just to see if you look

[SiFi]

Whining much louder now will barely move forward at all

[So Cal Mark]

sounds like the clutch is slipping now

[vandor]

Simon,

So the engine revs up, but the car does not move? Likely a clutch issue, but I've also seen where all the teeth sheared off the front layshaft gear. Either way you need to pull the tranny and investigate.

[SiFi]

Yes Vandor, the car revs up as usual, but barely moves on a level surface with a high pitched whining sound.......will take the general advice and drop the tranny and investigate

[SiFi]

Diagnosis - the clutch plate disintegrated.

Thanks everyone for the feedback

[So Cal Mark]

stock disc? pics?