Reverse, clunk, stop - repeat?

[RobinL]

So my poor 4200 is in with Autoshield to have a noisy spigot/release bearing sorted, fingers crossed it's under warranty.
However this morning it goes into reverse, travels a few feet, clunk, and all stop. Back to first, back to reverse and same again.
Anybody care to second guess what's buggered?
(Marios will sort anyway - top chap!)
Just thought it would liven up some ones coffee break while Mario's/Russ get down and dirty!

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[CatmanV2]

Handbrake shoes.

C

 

[RobinL]

Hadn't thought of that though I think it's more the resounding metallic sort of stop. Also apparently it happens with full lock left or right but not so much straight ahead :-(

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[CatmanV2]

Struggling to think of anything there, then
C

 

[Oneball]

I’m thinking diff as turning seems to make a difference.

 

[outrun]

Sounds like it's jumping out of gear? Release bearing?

 

[RobinL]

Nope. Stays in gear. In fact locked up but will shift to 1st. Diff is most likely. We'll see. Knowing my luck (and Maserati) it will neither be simple or cheap :/

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[Spartacus]

When turning would suggest diff problems . I hope im wrong .

 

[Felonious Crud]

Good luck! If it's under warranty anyway then presumably it's shouldn't be a big financial burden, at least.

 

[RobinL]

Diff. Confirmed. :-(
Warranty claim rejected as 'wear and tear' which I will challenge. As no parts of the diff are serviceable or subject to wear measurement then their observation is subjective to say the least.
I can sense a battle of words with the greasy liability dodging bast***s.
Interestingly I'm wondering if this might link into other conversations on potential diff damage by brake rollers during MOT. Which was carried out not 2 weeks prior to failure?

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[lifes2short]

Warranty claim rejected as 'wear and tear'

what a load of cra-p, that's exactly why I've never bothered with aftermarket warranties, always try and wriggle out of a valid claim

 

[2b1ask1]

Re MOT, I believe there is potential for huge failure of a LSD on The powered brake test rollers. Phil W will I’m sure be able to give you chapter and verse as he was an MOT tester.

 

[RobinL]

I have been following that discussion on here. If the diff had grenaded on the rollers it would be a simple arguement. A couple of weeks down the line may be a much more difficult proposition. I'm not a huge believer in coincidence so it will pursue anyway. Also as the MOT station is part of a national chain there may be a 'goodwill' potential.
Not sure how I can be certain how it was treated on the rollers though. Unless the brake test result from each wheel has a time stamp?
Anyone any ideas on that?

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[Gp79]

Oh no, not good at all.

Never bothered with an aftermarket warranty on anything as pretty much everything could be argued as wear/tear.

May be best to try persue a full refund on the whole warranty premium paid so far as it clearly is of no use, if successful that will cover some cost.

 

[lifes2short]

what does the small print say, does it specifically exclude diffs or are the warranty company just hoping you swallow what they say

 

[conaero]

Oh no, not good at all.

Never bothered with an aftermarket warranty on anything as pretty much everything could be argued as wear/tear.

May be best to try persue a full refund on the whole warranty premium paid so far as it clearly is of no use, if successful that will cover some cost.

Just push, push then send them an N1, it will never get to court and you would win anyway. They are just hoping you give up and go away....thats just not me!

The best £50 you'll ever spend:

 

[lifes2short]

it does depend on what the terms and conditions are, if it specifically excludes diffs, then you'll be pee ing in the wind, if it doesn't then it's far easier to do it with "money Claims" the online government web service, dead easy, just make sure you get the registered company name correct, check it at companies house.

https://www.gov.uk/make-money-claim

 

[RobinL]

Good advice and thanks. The warranty specifically INCLUDES diffs and all mechanical parts, and under wear and tear (elsewhere) does not mention diffs so I think it's just as said. They hope I'll go away. Which isn't going to happen.

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[lifes2short]

as conaero said keep pushing, write them some diplomatic letters, if still refusing then mention no option but court action required, they will probably ignore you thinking you're bluffing until the court papers land on their desks, would be surprised if they then don't send you a cheque to cover repairs and/or authorise repairs with a garage, bloody criminal you have to possibly go that far with it though, best of luck

 

[RobinL]

Update - it was the diff - replaced by Marios at Autoshield at an eye watering 3800 all in (I got away relatively lightly with that!) - and of course the warranty company cried ' Wear and Tear' - I'm having words with them about that just now as at 36k miles 'wear and tear' shouldn't come into it - unless of course its 36K miles of 'drifting'.

On the MOT issue however - the car had been MOT'd only 150 or so miles prior to the LSD failure - a suspicious coincidence I feel?

So I am discussing this with the MOT Test Station Company (its a UK Wide affair)
a) I asked them politely if they fancied paying
b) They politely refused saying they had never heard of such a thing and after having asked some friends in the industry they hadn't either so wouldn't be paying - ever.
c) I checked with Maserati UK if there was any existing advice concerning MOT/LSD - A very Italian lady referred me to HR Owen.
d) I checked with HR Owen - very helpful folks - who after preliminary checks say that they don't believe there is anything and, as that could potentially affect liability in other markets they don't think there will be anything - but they will confirm for me.
e) I checked the MOT testing manual 2018 which interestingly cautions MOT testers to ensure that the Rolling Road test is suitable as at Page 86, Section 3.7 it Cautions that Certain vehicles may not be appropriate for this test.
f) Some hours later I come across a letter by VOSA, (2011) under the freedom of information act that clearly states that vehicles fitted with Limited Slip Differentials are NOT suitable for Rolling Road Brake Testing and either a decelerometer or plate test must be used.............
g) Back to MOT people to see if they may want to discuss further........