Suby Trans whining on decel (with vid), Fixed it...I'm stoopid. Options

[Chris H.]

OK guys, I'm hoping someone knows WTF this is...I bought my 2006 WRX trans from a reputable guy on NASIOC. It only has 66k on it. The 2006 WRX was a 2.5T so more than capable of handling the 3.3L engine. It has a whine only on decel, and ONLY in gears 3-5. It has plenty of trans oil in it, Subaru OEM ($$$), compensating for the angle and missing center diff. I've done a lot of research on bad Subaru transes and when they go out there are a lot of other "bad noises". Terminal noises usually occur all the time, more often on accel than decel. There is NO grinding, ticking, squealing, humming, etc. in this thing. Just the "school bus whine" on decel.

Have a look at this:


https://www.youtube.com/watch?v=10Xj8GA6BDY


Just to clarify my comments on the video:

1. I ran the test several times and I ONLY got the whine on decel
2. It ONLY whines in gears 3-5 and gets louder with each gear

I was a little wishy-washy on those those things in the vid.

I had one odd thought...could it be the gear selector is slightly off kilter and rubbing something in gears 3-5 (IMG:style_emoticons/default/idea.gif) ?

There were a few threads on NASIOC that said "just ignore it"..hard to do that when it's so loud and I would hate to make it worse if there something wrong with it...but...it's hard to believe there's something too terribly wrong when it shifts well with no grinding, never pops out of gear, hauls ass, etc.

Anyone have thoughts on what it is?

[Chris H.]

Update....it's possible that someone (me) may have used the thinner of the two washers when in stalling my locking spool. Supposed to use the thicker one. The fluid is draining now and we'll find out. I just pulled the extra stuff I have left over and the washer in that baggie is 4mm thick. IF I did that it's possible that the gear stack is sliding 1-2 mm and causing the whining noise. FINGERS CROSSED!

[mgp4591]

Update....it's possible that someone (me) may have used the thinner of the two washers when in stalling my locking spool. Supposed to use the thicker one. The fluid is draining now and we'll find out. I just pulled the extra stuff I have left over and the washer in that baggie is 4mm thick. IF I did that it's possible that the gear stack is sliding 1-2 mm and causing the whining noise. FINGERS CROSSED!

What made you think of that? Sounds like you're on the right track and it definitely could drag and make noise... what noises I'm not sure but you'll figure it out! (IMG:style_emoticons/default/idea.gif)