Crunching gears. Help?

Soldato
Joined
20 Sep 2006
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Location
Hampshire
Hi guys,

My 2008 Mazda 3 MPS has developed a fault with shifting. When the 'box is cold I get a crunch through the gearstick when changing from first to second. All other gears are completely fine. If I shift from first to neutral, and then into second it will go in without crunching, but is sometimes stiff. Shifting from third to second when cold is stiff, but it doesn't crunch.

Once the 'box has warmed up after about 10 - 15 minutes driving the crunch is gone and the whole 'box feels great/normal.

When sat still with the clutch depressed all gears engage completely normally with no stiffness or crunching, it's only whilst moving, and only whilst cold.

Any suggestions before I go and get butt raped at a garage to have it pulled apart?

Thanks.

EDIT: 'Box oil is new as of a few weeks ago and is the right grade, fully synthetic.
 
Last edited:
The issue was there before the fluid change, although now it's worse.

It also wasn't doing it this time last year. Seems to just be getting slowly worse.
 
I'm not harsh with the gearbox or anything.

I also apparently have to be very careful with those types of oils because they can affect the LSD.
 
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