Results 1 to 4 of 4

"Planetary gearset noise".. Ideas or suggestions?

This is a discussion on "Planetary gearset noise".. Ideas or suggestions? within the Automatic Transmission forums, part of the Drivetrain category; Have an unususal noise from the rear of the car (or so I thought). It sounds like a dragging brake ...

  1. #1
    Junior Member
    Join Date
    Sep 2005
    Location
    Indiana
    Age
    54
    Posts
    13

    Brown
    Caprice Cop Car

    "Planetary gearset noise".. Ideas or suggestions?

    Have an unususal noise from the rear of the car (or so I thought). It sounds like a dragging brake or a vacuum leak, but is strictly MPH related (not RPM). The faster one goes, the louder it gets, and in coast or drive, and engine off or on, it stays the same.

    By putting the car on a lift, and running and in gear, the sound seems to come from THE MIDDLE OF THE DRIVESHAFT, and it is LOUD! Further inspection sources it to the rear of the transmission. A GM tech who knows these cars said it sounds like the planetary gearset. I just had the differential pinion bearing replaced, but can't understand how a once quiet tranny would cause such a noise all at once. A pan inspection showed normal wear debris and no bearing or bushing residue. The car has 86K miles and is stock and not abused.

    Aside from the noise, which is rather loud at 60 MPH, everything else is as normal. I don't want to have the tranny exhumed and autopsied unless necessary and the tech suggests living with the noise...

    Any ideas, suggestions, similar experiences???
    Thanks.
    From 210's to Corvairs, Impalas to Camaros, and a few dozen in between. Now, just these:
    2000 Camaro Z28, A4 - For occasional day trips...
    1977 Oldsmobile Ninety Eight - For the family...

  2. #2
    Junior Member
    Join Date
    Mar 2006
    Location
    Wisconsin
    Age
    33
    Posts
    4

    Red
    2000 Trans Am WS.6 6Speed

    I just bought a 2000 Trans Am WS.6 6-speed, and I think my car has the same thing. I had the car inspected by different dealer than where I bought it, and they didn't report anything wrong. I haven't narrowed down where the noise is coming from, but it definately sounds like it is coming from below the car and not the engine bay. It's just a constant "howl" that increases with speed. It is noticeable around 50 mph, and gets louder the faster I go....

  3. #3
    Junior Member
    Join Date
    Mar 2006
    Location
    Wisconsin
    Age
    33
    Posts
    4

    Red
    2000 Trans Am WS.6 6Speed

    The other day my car started making horrible, loud metallic rubbing noises when moving in neutral or when engine braking. Took it to a dealer, and the rear differential is totally messed up. The driveshaft was wiggling where it meets the differential, and most of the diff oil had leaked out. Gonna cost at least $1,500 to replace the entire rear axel. All this after 2 separate dealers did a safety inspection before i bought it two weeks ago....if only one of those loser mechanics had tried to wiggle the driveshaft and noticed that it was loose...

  4. #4
    The Bandit Wesman's Avatar
    Join Date
    Apr 2006
    Location
    NJ
    Posts
    4,033

    SGM
    1998 Trans Am WS6

    Quote Originally Posted by Iron1384 View Post
    The other day my car started making horrible, loud metallic rubbing noises when moving in neutral or when engine braking. Took it to a dealer, and the rear differential is totally messed up. The driveshaft was wiggling where it meets the differential, and most of the diff oil had leaked out. Gonna cost at least $1,500 to replace the entire rear axel. All this after 2 separate dealers did a safety inspection before i bought it two weeks ago....if only one of those loser mechanics had tried to wiggle the driveshaft and noticed that it was loose...
    I don't know your financial details or anything, but if it was me I'd tell the dealer to take tht $1500 and stuff it. For about a few hundred dollars more you can get a complete 12 bolt rear, ready to bolt in and go. Even with a minimal amount of mechanical skills, you could do it yourself. And it will be much stronger than any rebuilt 10 bolt would ever be. Just figured I'd suggest that for you in case you might want to go that route instead

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Rear Chassis/suspension "popping" noise
    By Whamhammer in forum General Help
    Replies: 6
    Last Post: 07-23-2015, 07:18 PM
  2. Ideas for "Pulling The Trigger PT2"
    By MudStainKILLA in forum Firebird / WS6
    Replies: 16
    Last Post: 01-01-2012, 06:28 AM
  3. Need ideas to win "Best offensive Halloween costume"
    By NeeD4SpeeD in forum Almost Anything Goes
    Replies: 35
    Last Post: 10-19-2011, 11:44 AM
  4. Ideas for a "you cant park" business card
    By Spikito in forum Almost Anything Goes
    Replies: 7
    Last Post: 09-28-2011, 06:57 AM
  5. Accelerating problem and "popping noise"
    By 94camm in forum General Help
    Replies: 2
    Last Post: 10-05-2005, 09:38 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •