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Hi All,

I have a 159 TBi, had a whining noise while accelerating in the 5th and 6th gear.
I replaced the three endcase bearings to the uprated ones(62mm if i remember correctly) and also replaced the endcase itself to the uprated one.

The whine at the 5th gear disappeared completely, the whining noise at the 6th gear remained. it is much quieter now but still disturbs me.
Im using redline mt-90 gearbox oil and ive put 3 litres and not 2.2 litres like its written in the manual.

Any idea what could be the reason for the whining noise?
Its not the turbo and not the intake for sure.
 

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There are also 3 bearings on the opposite end of the 3 shafts.
Typically when this repair is made all 6 bearings are changed on the M32.
 
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