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Trans whine on decel

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Old Aug 15, 2010 | 10:44 AM
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Default Trans whine on decel
Did a search but most seem to be able trans whine on acceleration.
Pretty much any gear I have it in the tranny whines when I let off of the gas. Goes away completely when Im accelerating or when the clutch is pressed in or it's in nuetral.

Any ideas?
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Old Aug 15, 2010 | 11:46 AM
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Are you positive it's the trans and not the rear diff?

I've seen whiny T56 boxes quiet down when the fluid is changed to Synchromesh (GM or Pennzoil), but your description sounds more like the rear differential.
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Old Aug 15, 2010 | 11:59 AM
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Hmm What would cause the rear to just start whining all of a sudden? I just had the seal replaced about a year ago w new fluid. The 12bolt has run fantastic for the last 4 years w.o any noise.
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Old Aug 15, 2010 | 02:14 PM
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And the sound seems to be coming from where the transmission is, right under the dash and not near the back of the car.
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Old Aug 15, 2010 | 02:57 PM
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I'd change the fluid in the trans, probably something on the thick side like Amsoil ATD or Pennzoil Synchromesh.
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Old Aug 15, 2010 | 05:21 PM
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Change Fluid and check the u-joints! Those would be my first two things to look at!

Vince
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Old Aug 15, 2010 | 05:58 PM
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Sounds like the diff to me. Does it make the same noise in 4th gear?
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Old Aug 15, 2010 | 09:17 PM
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It makes the noise in all gears when I let off the gas. More prominent in 5th and 6th.
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I seen this in a post like 3 years ago hope it helps...


http://www.differentials.com/diagnose.html
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Old Aug 31, 2010 | 06:10 PM
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Turns out I had a bad pinion seal which is why it was leaking and upon tearing it apart I had a bad pinion bearing as well which caused the howling I heard.
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