Accident - will this kill your gearbox?

[toby1]

Urinating in the breeze I feel

 

[Corned]

Firstly, sorry to hear about your friend. I hope he will soon be on the mend.

Subsequent investigation of the mechanics found the clutches in the gearbox to have been burnt out causing sever slipping, they feel it could not have been caused by the accident.

If the slipping is severe enough to prevent any reasonable forward progress of the car post-accident, then the question needs to be asked as to how would he have been able to drive forward into the wall in the first place, if this was the condition of the gearbox pre-accident?

 

[Naraic]

Just too much of a coincidence.

 

[panason1c]

I would have thought that it wouldnt have been long before people came to your friends aid and turned off the engine........before any tranny damage would occur?

 

[panason1c]

The vehicle came to a dead stop

Another possibility.... Coming to a dead stop whilst in drive, and under load could have caused something in the box (clutch pack?) to shear?

 

[brandwooddixon]

sorry to hear of your friend's mishap, but glad to hear that he's out of hospital and on the mend.

Was the front of the car damaged enough to split the gearbox oil cooler or pipework?

If so then there's probably no oil in the gearbox. Difficult to say how much damage could have been done to it, but surely it's a question of the insurance sorting it out.

 

[alexanderfoti]

sorry to hear of your friend's mishap, but glad to hear that he's out of hospital and on the mend.

Was the front of the car damaged enough to split the gearbox oil cooler or pipework?

If so then there's probably no oil in the gearbox. Difficult to say how much damage could have been done to it, but surely it's a question of the insurance sorting it out.

This is what I was going to day, broken front rad = no oil = clutch wear!

 

[Alex Crow]

Mercedes technicians, when checking the fluid level in the 722.6 box, used to run them at circa 2,000rpm in gear, holding the car stationary on the brakes to heat up the oil.
Mercedes then issued modified advice, stating that this procedure can overheat and damage the clutch plates.

I say that IF the vehicle was in drive, and stationary, with engine speed at eg 2,000 rpm, the clutch plates could be damaged within a couple of minutes or so.
But that is a big 'IF'.

And wheel spin? I don't think so...

 

[television]

Mercedes technicians, when checking the fluid level in the 722.6 box, used to run them at circa 2,000rpm in gear, holding the car stationary on the brakes to heat up the oil.
Mercedes then issued modified advice, stating that this procedure can overheat and damage the clutch plates.

I say that IF the vehicle was in drive, and stationary, with engine speed at eg 2,000 rpm, the clutch plates could be damaged within a couple of minutes or so.
But that is a big 'IF'.

And wheel spin? I don't think so...

Thank you Alex that is exactly what I said at the start, we used to do it years ago called a stall test for the convertor, only for a few seconds

 

[cleverdicky]

Isnt that also a 'poor mans' test for checking the exhaust?
You ol'd timers may remember. Car in gear, handbrake on rev the nuts.
If the exhaust is blowing anywhere you can hear it.
Doubt if its still done though.

 

[davidsw]

Best way to test exhaust is briefly put a rag over the end .

 

[Xtractorfan]

Or drive slowly into a garage or shed and the blow out note will change as soon as it is level with the garage door/walls

 

[toby1]

Or connect a garden hose, breathe in and see what happens

 

[Xtractorfan]

Or connect a garden hose, breathe in and see what happens

You have been trying this

 

[television]

Isnt that also a 'poor mans' test for checking the exhaust?
You ol'd timers may remember. Car in gear, handbrake on rev the nuts.
If the exhaust is blowing anywhere you can hear it.
Doubt if its still done though.

No, it was a stall test and in the Borg Warner model 8 and type 35 gearboxes service manuals in the early 70's

 

[Corned]

Or connect a garden hose, breathe in and see what happens

You have been trying this

I have been doing thattt four yaers, and smkiroplkwsv fkj s k jw kjfgvhwet l.ka dkedlfkqavl d kswk al kfn

 

[Wheeler3108]

If he drove into a wall, what was in front of the wall?? Was it grass or gravel or Tarmac. The wheels will spin easier if it wasn't Tarmac.

 

[brandwooddixon]

I would have thought that this is all academic, unless no claim is being made on the insurance.

The insurance company will assess all points and make their decision. The car obviously drove before the accident and so if it no longer does then you have a strong point to make that the fault is related to the accident.

Depending on the damage,, the insurance company may decide to write the car off even without taking the gearbox behaviour into consideration.