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Mpi Gearbox: Gearbox Rattle When Clutch Disengaged In Neutral, Plus Gear Selection Issues.


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#1 MiniGrin

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Posted 05 April 2014 - 12:33 AM

When im stopped, if in neutral and the clutch is down, the engine sounds normal, slight tappet ticking noise, nothing unusual. 
When the clutch is up (still in neutral) the gearbox makes a noise louder then the engine, its a like a metallic rattle/grind, rhythmic and changes with the engine revs yet only really can be heard over load exhaust on idle. Its not like a single noise, its lots and lots and lots of metallic rattling noises. Yet all is silent and well when i have the clutch engaged.

Also some days it just wont have a gear, especially bad in 1st. Often if you go into second and then push hard forwards it will sort of force it in, but others it really really wont have it. as in the gear-stick physically wont go forwards into the slot. (worst when stood still such as at traffic lights)

Its a 97/8 MPI Cooper Sport (4 gears and reverse (not 500)), It had its gearbox reconditioned around a thousand miles ago. Got plenty of 20/40 mineral oil (just under max) and clutch fluid level is on the max (full plastic bottle).
It started both of these strait from getting it back after a rather rubbish local garage did me the gearbox (after 4 months, many issues, mistreating/no respect of/for my car and an extortionate rip off bill) and they put 10/40 semi synthetic oil in, which i thought could be the culprit, now with thick 20/50 as has been for 300 miles and its not better. 

What could be causing it?
Is it even a fault or is this normal?
Could they be linked?
Any simple fixes or is it a garage job? (given I although very willing don't have a huge amount of knowledge or time)
Is it okay still to drive or will I be doing it more damage?

Any help appreciated, Thanks, James.


Edited by MiniGrin, 05 April 2014 - 01:35 AM.


#2 baggy33minis

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Posted 05 April 2014 - 02:56 AM

Possibly the clutch release bearing if the noise goes when clutch is pressed.I have had this before myself and then it failed totally and couldn't get gears or take it out of gear.

 

they are only a fiver and reasonably easy to change on most minis but mpi's will need more bits taken off like ecu etc to get at it.

I am in Mansfield and could do it for you if you are not confident.

 

I would think it is definitely worth trying this first before considering you have a knackered box.



#3 The Principal

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Posted 05 April 2014 - 07:10 PM

Could be the release bearing if its dragging or could be idler gear chatter quite common not a problem unless its really loud then you may have worn bearings or play in the shims


Edited by The Principal, 05 April 2014 - 07:17 PM.





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