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> tranny noise
SirAndy
post Jan 23 2004, 02:31 PM
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ok, so i got this noise in the tranny.
having had a oil-leak, i tought i was simply running low on oil.
fixed the leak and filled up with fresh oil (swepco), noise is still there.

when slowing down and downshifting, i have a "whiny" noise very similar to the noise you get when driving in reverse and letting of the gas.
it's there in 2nd but even louder in 1st ...

shifting itself is fine, no crunching or anything.

any ideas?
Andy
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Carrera916
post Jan 23 2004, 06:02 PM
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Andy,

if its been spend for $2500 and the intermediate plate bearings hasn't been changed, I'll be damn surprised!

do you hear the whinning change when you accerate or de-accerate a bit on lower gears only? such as 1 & 2? if so, there's a good chance that the plate bearings is giving you problems. you see, the force of the two gears meshing on input and pinion shafts, does move the shafts apart a bit (that can get worse if the intermediate plate bearings are shot. Now, the other set of bearings in the gearbox case that hold the pinion shaft can be a problem if the beveled gears are moved around a bit. That usually cause the whining. The surface contact between two gears can make incrediable noise if you move one gear away or closer to the other gear, hence the whining noise.

I do not think the differential bearings would be the problem but I would double check to be sure its in good shape. Another area to look at, when you remove the gears from input shaft, take a closer look at the needle bearings that goes inside the gears, check that the surface of the race are smooth, not pitted....if so, there's the noise!

hope this helps...

jerry
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