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Old 01-27-2010, 04:12 PM   #1
Scooby Specialist
Member#: 190378
Join Date: Sep 2008
Chapter/Region: SCIC
Location: Vancouver/Portland/SCIC/OC
2008 Dinan 335i

Default **** Transmission problems... again! !!!!SOLVED!!!!

Sooo I have rebuilt my transmission twice. NOT looking forward to doing it again.
Everything has been going great after the last rebuild, until I decided to switch gear oil and went with Redline Shockproof (3 qts) and Motul Gear 300 (less than 1 qt).

At the same time I went with Redline Diff oil in the rear.

As soon as I changed the fluid, my car started making weird noises such as the ones you will see in the video. I don't even know how to describe them! I tried contacting the creators of the videos, but I haven't found anything out yet.

What could it be???

To me it seems like it is coming from the front right, but I am not sure. The sound is kind of like metal scraping together, and sometimes it sounds like its bumping around.

Wheel bearing?
Center diff?
Rear diff?

Ahhh help me out guys
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Last edited by spulbi; 01-28-2010 at 06:42 PM.
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Old 01-28-2010, 02:05 AM   #2
Scooby Specialist
Member#: 146569
Join Date: Apr 2007
Chapter/Region: NWIC
Location: Vancouver, WA
2009 A4


almost sounds like my PPG's lol, hrmm i would guess a center diff or front diff. it is speed dependent right? ie the faster you go the louder? or is it rpm dependant?

my guesses would be center diff, front diff or a wheel bearing. its really hard to tell. hope its something easy i guess. if it still makes the noise in neutral its definitely not your gears.

but the front and center diff will still make noise.

the best way to find out would be to put in on a lift and drive it and listen under the car for the source.

hope this helps ed
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Old 01-28-2010, 09:29 AM   #3
Member#: 99694
Join Date: Nov 2005
Chapter/Region: MAIC
Location: 09 SS GTR
2015 rocketbunny brz


Those videos have pretty good sound quality!Is the noise speed related only? It doesnt mater if your in gear or not, it still makes the same noise and seems to follow speed???

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Old 01-28-2010, 12:18 PM   #4
Scooby Newbie
Member#: 211671
Join Date: May 2009

Sounds all too familiar...my 04 FXT is making the same damn noise. I'm getting the dealership to look at it tomorrow.
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Old 01-28-2010, 04:36 PM   #5
Scooby Specialist
Member#: 190378
Join Date: Sep 2008
Chapter/Region: SCIC
Location: Vancouver/Portland/SCIC/OC
2008 Dinan 335i


Well after hours of reading and pouring through old threads (01+) I FOUND THE PROBLEM!

I believe in the original WRX deceleration noise thread somebody mentioned the rear subframe brackets that they used to jack up the car. It turns out, when I changed my transmission and rear diff oil, I used that bracket to jack up the rear, and I bent the bracket. I thought I had messed up something in the transmission.

What ended up happening, was whenever I would decelerate in gear, ~40 mph in fourth gear, the vibration from the rear diff and propeller shaft was traveling through the chassis, because that bracket was touching the rear subframe.

Sooo for all the people out there like me, it wasn't a clutch problem, it wasn't a tranny problem, and it wasn't a diff problem. It was a stupid metal bracket that took me ten minutes to bend back.

Case closed.
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Old 01-28-2010, 07:32 PM   #6
Uncle Scotty
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Join Date: Mar 2002
OK buy Nates beans


you dont know how many of those that I have had to hammer back into shape after loonies have bent them like that
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