Hi fellas. I have a 2002 Wrx with 220K on the clock. I have over the past few weeks noticed that the powertrain is beginning to fail. What an where~ I do not know. That's why I am asking for someone to help me out here. Here are my symptoms:
-The common shift into 1st gear grind is ever present(but I avoid it as much as possible)
-The car seems to have a lot of slack or backlash in the drive train. (more than any other manual I have ever driven)
-At take off, around 7mph-15mph, IF I even hardly give it throttle, the car makes a very loud and fast thud-thud-thud-thud-thud---
-At Speed, in any gear around 1900 rpms and Higher, the car Vibrates like a MOTHER. slower at a lower rpm's, and faster at higher rpm's
-If I let off the throttle while cruising and allow the car to stay in gear and let the engine slow me down, ITS straight SCARY. The car starts making a noise similar to a midget with a hammer in a metal drum..
-After 15 mins or 5 miles of city driving, my WRX magically sounds like an empty soda can with a rock or two inside bouncing around when at really low speed, say 1st and reverse gears. (at least that's the only time I can hear it..)
-Lastly, there is a noise that gets louder and louder as my speed increases, not necessarily my rpm. It makes my car sound like a fighter jet!
I am mechanically sound and can make my way through anything with a wrench given enough time. I am just VERY unfamiliar with the WRX. What I am asking from the community is some straight up, RAW info pertaining to the 02 WRX tranny, center diff, and rear diff. I have ideas of what my issues are, but I need some more confirmation or re-direction. Here's my list of thoughts to compare:
-I am pretty sure my Rear Differential gears are beginning to exceed the tolerance specs and is binding up on take off, and that's the loud and very fast thuds. The diff could also be the culprit of the vibration as torque is applied when gaining speed.
-I believe that the bearings in my transmission are toast, and cause the whine/jet sound at high speed.
-I believe the sound of something bouncing around may be a bearing that has fallen out of the race and is catching a tooth every so often and being flung around inside.
Some golden info or help would include- Where can I get the parts to rebuild some of the above mentioned possibilites. If there are any forms of upgrade that will keep me from these very same issues down the road. What is the Type of Tranny, and diff that is in my stock 02 wrx? For example: a 99 ford f450Diesel that has an Automatic transmission is known as the 4R100 transmission. I think the tranny in my WRX is an RA? is that correct? What about the Diff? Like I said, any info helps. thanks ahead!