Reverse, clunk, stop - repeat?
- Thread starter RobinL
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conaero
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Rolling road is the standard for MOT's they all have them.
Interestingly, when I sent my Opel GT in for MOT it didn't fit so they attached some yawl meter thingy to the front mat and drove it and stamped on the brakes....yep, there ok. Doesnt matter if they are unbalanced, if it stops with a certain pressure then you pass.
Interestingly, when I sent my Opel GT in for MOT it didn't fit so they attached some yawl meter thingy to the front mat and drove it and stamped on the brakes....yep, there ok. Doesnt matter if they are unbalanced, if it stops with a certain pressure then you pass.
RobinL
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Mostly because the answers I got were along the lines of - 'we've never heard of rolling road damaging anything' and an assumption on their part that they were defending the use of a rolling road.
I have asked them if they can demonstrate that use (or not) of a rolling road was a clear decision for my MOT and that it would have / has been recorded. I'm hoping not.
Also in the rather limited time that MOT stations now have for MOT I very much doubt if they would have considered a drive around test to be reasonable?
I am working on the idea that Id like them to prove they didn't use a rolling road? Rather than I prove they did (more difficult)
I think it a little unfair that an MOT tester may get a hard time for probably an everyday failure of just about every MOT station - but on the other hand right now I'm 3800 out of pocket!
Also highlighting the issue may help others to avoid a similar, though rare, occurrence.
The take away has to be that guidance has been given by VOSA, in the past, to avoid Rolling Road Brake test for LSD vehicles.
I have asked them if they can demonstrate that use (or not) of a rolling road was a clear decision for my MOT and that it would have / has been recorded. I'm hoping not.
Also in the rather limited time that MOT stations now have for MOT I very much doubt if they would have considered a drive around test to be reasonable?
I am working on the idea that Id like them to prove they didn't use a rolling road? Rather than I prove they did (more difficult)
I think it a little unfair that an MOT tester may get a hard time for probably an everyday failure of just about every MOT station - but on the other hand right now I'm 3800 out of pocket!
Also highlighting the issue may help others to avoid a similar, though rare, occurrence.
The take away has to be that guidance has been given by VOSA, in the past, to avoid Rolling Road Brake test for LSD vehicles.
CatmanV2
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Personally I think it's fare more likely a coincidence and the warranty mob should pay up. I think putting any blame on the MOT testers is likely to be a zero sum game. They can't just think it's unreasonable. As you know VOSA send out the advice. The MOT chains head office legal people would be having fits if they thought for a second this wasn't being applied. They'd be liable for every case, I'd have thought. How many thousands of times have forum cars been through an MOT and this not happened?
Anyway, hope you get it sorted ASAP.
C
Anyway, hope you get it sorted ASAP.
C
CatmanV2
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RobinL
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I agree in who should pay, (but I'm never a fan of coincidence) so chasing both options. Yet to hear from warranty company. Both are likely difficult after the fact but emails cost nothing. I will have to put more thought into this if I end up with small claims action.
At least next MOT I am aware!
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azapa
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Just had my local version of the MOT and they rolling road to test the brakes, picked it up with Christmas tree asr go to dealer stuff going on...
The guys told me it was normal, and it did clear on driving.
I still think it could be a possible source of damage in your case though, especially if the rolling road was bad or not operated correctly.
Good luck
The guys told me it was normal, and it did clear on driving.
I still think it could be a possible source of damage in your case though, especially if the rolling road was bad or not operated correctly.
Good luck
Geo
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I purchased one and checked the calibration with my MOT tester's own one. It's great being able to set up the handbrake and know that it's going to pass.
conaero
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That was it...a most bizarre thing.
CatmanV2
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Geo
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You can get electronic ones now
C
I must check the Tapley agianst my iPhone G meter.
Not good...!
I agree- re coincidence ! Still..the Virgin Mary has appeared in people's toast, apparently !
I might be missing something here but the rolling road being used to test braking force should nt need to run into the kind of speeds that would necessarily fry the LSD..
I mean, braking force is what they need to measure, and speed/rpms isnt a pre-requisite of torque...AFAIK
I think it might still be possible to make a f00k up of it but Im not familiar enough with the road testing facilities...
I felt like a bit of a to55er going into my local AM dealer and insisting they dont use the rolling road for brake testing tbh.
I agree- re coincidence ! Still..the Virgin Mary has appeared in people's toast, apparently !
I might be missing something here but the rolling road being used to test braking force should nt need to run into the kind of speeds that would necessarily fry the LSD..
I mean, braking force is what they need to measure, and speed/rpms isnt a pre-requisite of torque...AFAIK
I think it might still be possible to make a f00k up of it but Im not familiar enough with the road testing facilities...
I felt like a bit of a to55er going into my local AM dealer and insisting they dont use the rolling road for brake testing tbh.
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Geo
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philw696
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As Newton states I was a tester in the UK until the end of 2014 and I would only use the Tapley meter on 4 wheel drive and high performance motors.
You only need a short drive and slow speed to use the device to get efficiency.
You would also feel out of balance too.
Every station has one and they have to be callorbrated.
Having had 2 4200 F1 motors and driven them ******* and off track never had issues.
I was also testing in NZ and every vehicle there is road tested.
You only need a short drive and slow speed to use the device to get efficiency.
You would also feel out of balance too.
Every station has one and they have to be callorbrated.
Having had 2 4200 F1 motors and driven them ******* and off track never had issues.
I was also testing in NZ and every vehicle there is road tested.
RobinL
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Problem appears to be that IF your car is a bit light for the rollers as a pair (tyre slip) then the rollers may be operated one by one. Then there is a potential problem.
VOSA recomended up until 2011 not to use on LSD.
Now they leave it to local judgement!
Sent from my ONEPLUS A5010 using Tapatalk
VOSA recomended up until 2011 not to use on LSD.
Now they leave it to local judgement!
Sent from my ONEPLUS A5010 using Tapatalk
Zep
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I don’t suppose Marios is able to give a diagnosis of the cause of failure? If, for example, the fault was caused by damage to the friction plates in the diff, this would be a smoking gun for the MOT causing a fault. If it is the planetary gears inside the diff and something has broken this could dispel the “wear and tear” argument. If it is a disintegrating bearing, you might end up wearing it.