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Whoops Think I have Just Blown Up My Gearbox

robwright

robwright

New member
Evening all. Bad times. Was taking the kids home tonight motoring along when all of a sudden the rev counter jumps right up and I have what sounds like a food mixer full of bolts coming from the transaxle area. Pulled over and the noise went away in neutral. Engaged gears fine so thinking clutch is OK. Set off again and and as soon as you make any mild inputs with the throttle same again!!!!! Managed to limp back to the kids home between 20-30 mph so at least they got home OK. Didn't quite manage to make it back home though so now I have a stranded Turbo and had to call the her indoors cavalry. Thankyou love you are a star. Have I ever told you how much I love you [:D] I am thinking all gears engage fine so must be the final drive or the diff?? Outside chance it may be the torque tube but doubt it very much. All help much appreciated in advance guys.

Poorly stranded Turbo - BAD TIMES!!!!

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Gutted mate, let me know if you need owt or just a beer [;)]

Fingers crossed she's the way you left her when you go back in the morning
 
bad luck !.
Odd that it drove at all after what you describe.

You'll need to systematically check and eliminate everything in the transmission tomorrow.
If the engine starts and revs without problem you can at least eliminate that. Sounds travel in some surprising routes when you are sat in the car.
You could try jacking the drive wheel off the ground and sticking it in gear and turning the wheel . See if you can feel or hear anything under the car. Alternatively get someone to tow the car in gear slowly and listen for the source of any graunchy noises.

it could be the diff or cv/axle splines but if it were the gearbox I wouldn't expect it to select gears and drive at all.

Hope its something easy and cheap [&o]
 
I definitely think it is the transaxle mate. I am going to take it off the road again!!!! I will drop the transaxle (not all that hard to do) and start from there. If it isn't the transaxle then it's not time wasted and gives me a chance to do some overhauling. Can you see I am looking for silver linings here [:(]
 
Keepus posted Rob, it will fix but sure you could certainly do without the grief !
Everyone in one bit though !
 
Rob

sorry to hear of your woes. Two things, I really hope there's no other damage to you car today when you receover it. Secondly, if you need any help dropping the transaxle ( I know you're a very capable chap !) just e-mail me - would happily pop up to Stamford with kit to help out !

Yours

Chris
 
Bad luck mate - think the 2.7 will need work on the trans too!
Thoughts
However, dont rule out the clutch - it only needs to disengage - to allow you to select gears - engage is another matter!
If gears are selecting ok - and feeling normal, they are probably ok.
Being a Turbo, diff probably gets a hard life (1st and 2nd gears are hardened I believe to help gearbox)
As Peanut says try lifting rear and or towing slowly, and sounds do travel!
Could be available Sunday, if necessary.

 
Was taking the kids home tonight motoring along when all of a sudden the rev counter jumps right up and I have what sounds like a food mixer full of bolts coming from the transaxle area. Pulled over and the noise went away in neutral. Engaged gears fine so thinking clutch is OK. Set off again and and as soon as you make any mild inputs with the throttle same again!!!!!
Click to expand...

Bad luck Rob, sorry to hear your news.

Without wishing to depress you [:eek:] , I had a similar thing with my old Lux whilst pulling out af a junction 6yrs back...

I lost all drive completely after 10yrds of cluncking and banging - facing side on to a road full of oncomming traffic. It transpired that the input pinon, that drives the diff outer ring gear, had shed half its teeth. The box had been noisy for several months prior. But it went suddenly - with some loud foodmixer noises - when it finally happened.

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After an intensive post-mortum, I put the cause down to some seriously worn diff bearings (some of the needle rollers were shaped like apple cores) causing excessive loading on the gear teeth through poor lash control.

The turbos and S2's have much beefier pinion and ring gear teeth, but this is a very highly stressed part of the driveline.

If it is indeed the ring/pinion, I would highly reccomend putting some new diff bearings in the replacement box if you get chance.

It is possible to remove the diff cover with the box still on the car. Just remove the drivers side driveshaft and output flange (M8 bolt) then the cover bolts can be removed.
 
On the plus side mine didn't have any drive when the diff failed so might be torque tube or similar?
 
Well she is home safe and sound. Firstly thanks to everyone for their concern and offers of help. The missus did get a friendly visit from the cops today though to say a member of the public had seen some undesireables sniffing round it and they were concerned. So a big thankyou to them and the Lincs police for that one. Hopefully tomorrow I can get on with sorting out the root cause.
 
Great to hear she is back where she belongs. Fingers crossed that whatever the cause of the problem, it turns out to be the "least worst" scenario !
 
Well the transaxle is out eventuyally. A little tricky but nothing too difficult with help from Andy. Thanks again mate. You are a star [:)] Most of the time was taken up by trawling round for a 12 point bit for the drive shafts, which I initially thoughts were torx head screws [:mad:] Sadly didn't have time to get the cover off to have a look at the diff but will save that job for tomorrow night. Thankfully we seem to be having the weather for it. I think a good refurb of the cross member is in order while it is out. As for what was left behind I was very happy. All nice and tidy and looking good in the area above where the transaxle normally sits [:)] Only minor work needed in there.

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Know what you mean about the 12 point Rob, I ended up having to go about and buy a set when I dropped the auto box on my 924S.

Didn't know the crossmember was part of dropping the box on a manual '44 so thats something I've learnt for the day (very soon) that I change the clutch
 
Bad news Rob, the trouble with running cars of this age is that there is potential for something nasty to happen at any point.....I am acutely aware of this at 212k miles and as the 944 is my only car!
 
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