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Mini 30 Crunching Between 2Nd And 3Rd ?


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#1 Zippster1977

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Posted 02 September 2017 - 05:56 PM

Hiya
Fairly new to mechanics and minis and dealing with some teething problems ! Generally getting a crunch between 2nd and 3rd . Any tips ? Cheers

#2 DeanP

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Posted 02 September 2017 - 06:25 PM

Sorry if I'm teaching you to suck eggs, but these are old gearbox's, are you changing gear too quickly? Clutch right to the floor and feed it in letting the synchro do the work. If it still crunches let us know.



#3 Zippster1977

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Posted 02 September 2017 - 07:06 PM

Really appreciated

#4 Northernpower

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Posted 02 September 2017 - 10:59 PM

How many miles has it done and what type of oil and when was the last oil change?

#5 Zippster1977

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Posted 03 September 2017 - 07:12 AM

It's done 70k , it's actually just had an oil change ! Cheers

#6 Northernpower

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Posted 03 September 2017 - 07:15 AM

It's done 70k , it's actually just had an oil change ! Cheers

Unfortunately then, if its not had a rebuild its sounds like its going to need one. Its a very common problem. You'll find lots of threads on here relating to it.



#7 mr cooke

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Posted 03 September 2017 - 03:57 PM

could try double de-clutch this worked for sometime for me . 



#8 robminibcy

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Posted 03 September 2017 - 07:37 PM

Only solution is rebuild time, that said though when i first got my mini it would crunch going to 3rd and it didn't get any worse for the next 40k i did in it until it was time to remove the engine for a rebuild due to excessive oil consumption! You can probably get around the issue with a bit of heel and toe or double declutching as mentioned above 


Edited by robminibcy, 08 September 2017 - 11:42 AM.


#9 Zippster1977

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Posted 03 September 2017 - 09:06 PM

Thx heaps ! Very helpful

#10 mr cooke

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Posted 05 September 2017 - 06:07 PM

Mine was crunching from 3rd down to 2nd .I was lucky I dropped on a low mileage 1275 engine with gear box  . 



#11 Cooperman

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Posted 08 September 2017 - 09:56 PM

If it is allowed to continue to 'crunch' when changing gear, the gearbox will wear further.

 

There are two options:

 

1. Re-build the gearbox

 

2. Double de-clutch when changing gear (not heel & toe, that is something entirely different). The gearbox in the early Minis had syncromesh which didn't last long and we all double de-clutched back then.



#12 alittleawkward

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Posted 08 September 2017 - 10:51 PM

I tend to just give mine a bit more gas when I go into 3rd and it's happy. May be worth considering changing at a lower speed, and have a slightly slower transition?



#13 Cooperman

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Posted 08 September 2017 - 11:21 PM

If you double de-clutch it is no problem at all.



#14 Northernpower

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Posted 09 September 2017 - 05:47 AM

Or perhaps make the decision to do a box overhaul and at the same time tweak the engine as well :proud:



#15 minifreek1

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Posted 10 September 2017 - 09:05 AM

Mine crunches going into 2nd, if I double clutch it goes in no problem :)

 

Mine will be coming off the road next year to strip the engine and gearbox.... might be changing to a SC gearbox though - because I want 1 and dont care about the noises :)






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