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  #1  
Old 07-03-2018
revol revol is offline
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Default B6/B6D gearboxes

On the bench I've got a B6 and a B6D. The box in the B6D is very free and smooth, the B6 is a little tight and not quite as smooth as the B6D.
Is this normal or should both be the same and the B6 has a problem?
I'd have though that they should both spin freely and smoothly as they're both 3 gear systems rather than belts.

Thanks.
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  #2  
Old 08-03-2018
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discothesnake discothesnake is offline
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Default Gearbox

Could be a bearing or two at the end of their life?

Have you over tightened the screws in the casing?

I have both cars and both are spot on.
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Old 08-03-2018
revol revol is offline
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Something isn't right. With the case just held together by hand it's ok but as soon as I start fitting screws it tightens up. Have ordered a new gear case and a top shaft just in case.
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Old 08-03-2018
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One is a gear diff and the other is a ball diff right? They'll feel quite different one another... could that be it?
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  #5  
Old 08-03-2018
revol revol is offline
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Correct, but not the diffs. Whole box is noticeably tighter on one than the other.
On closer inspection the box case looks to have some possible heat damage from the motor.
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Old 08-03-2018
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I had this... on my original B6. New gearbox case didn't fix it, so I think it was a bearing. Same problem existed between ball diff and gear diff as well, so that was the shims eliminating the issue.

I would try replacing the bearings first.

Sorry I cant be of anymore help!
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  #7  
Old 13-03-2018
revol revol is offline
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New case and/or top shaft have cured it. Bearings felt smooth so they're ok.
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