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2G Blown Rear Diff?

Posted by spyderdrifter, Apr 7, 2018

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  1. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    Was driving alone today and my car started acting odd. Then it started not moving after I stopped at a stop sign. I thought my brakes had locked up, but I pulled all the wheels and the brakes were fine. I couldn't do more than get the car to rock back and forth. Based on the video, did my rear diff lock up? Car is a 96 TSi awd with manual trans and BFB rear diff.

     

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    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  2. Nikolay_Ruskov

    Nikolay_Ruskov Proven Member

    208
    2
    Joined Jan 25, 2008
    san antonio, Texas
    It could be your transfer case. My transfer case run out of oil once and lock my rear tires and i was on the highway not fun time.
     
    My DSM:
    1997 Mitsubishi Eclipse GST

    12.741 @ 113.810 MPH
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  3. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    How can I tell which one went bad? If I get all 4 wheels off the ground and turn them, what should I be looking for?
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  4. Nikolay_Ruskov

    Nikolay_Ruskov Proven Member

    208
    2
    Joined Jan 25, 2008
    san antonio, Texas
    You will have to jack the car and if you don't see any visible damage on the transfer case or the rear diff, you will have to start disconnecting parts .First you can take out the 4 bolts on the rear diff (the 4 bolts which are connecting the rear diff with the drive shaft) this way you will separate the rear diff and the transfer case and it will be more easy to locate from where is the problem coming. If your rear tires start moving after you disconnect the drive shaft your problem its going to be the transfer case or the transmission
     
    My DSM:
    1997 Mitsubishi Eclipse GST

    12.741 @ 113.810 MPH
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  5. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    So if the rear wheels freely turn in either direction, the rear diff is fine?
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  6. Nikolay_Ruskov

    Nikolay_Ruskov Proven Member

    208
    2
    Joined Jan 25, 2008
    san antonio, Texas
    Yes .
     
    My DSM:
    1997 Mitsubishi Eclipse GST

    12.741 @ 113.810 MPH
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  7. Talon96fwd

    Talon96fwd Proven Member

    171
    17
    Joined Apr 11, 2011
    Alexandria, Virginia
    Actually this happened to me a few weeks ago. What I did is drain the rear diff and BOOM all metal shavings out the rear diff. Drain the diff and transfer case and see what the fluids look like.
     
    My DSM:
    1996 Eagle Talon TSi

    14.184 @ 104.365 MPH
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  8. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    I'll be checking it out tomorrow. Was a bit of a pain getting the car off the tow truck. Front wheels turned normal, and the rear ones "skipped" as we tried rocking and pushing the car down the ramp. Even at the trucks full ramp tilt, it wouldn't roll on its own.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  9. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    I drained some of the rear diff today, and got good looking fluid after some dark sludge poured out. There were some metal pieces in it. T-case looked fine. I have a replacement rear diff but it's an LSD (bfh) and my Talon currently has an open diff (bfb). Are the axle spline cups the only difference between lsd and open diff axles? I got one lsd axle with the lsd and can't ind the other one I know I had. If I get an lsd spline cup, can I just swap the cup onto the non-lsd axle and make it work with the lsd?
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  10. pauleyman

    pauleyman DSM Wiseman

    4,749
    812
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Doesn't appear you've found the problem. So before asking about the axles drain the trans. When you say metal pieces do you mean flakes? Or big chunks?
     
    My DSM:
    1997 Eagle Talon TSi AWD

    Street Build

    T25   manual
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  11. shinzon

    shinzon Proven Member

    236
    39
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Have you disconnected the driveshaft and attempted to turn the rear wheels yet? As Nikolay said, if the rear wheels turn freely without the driveshaft, it could be the transfer case or your center differential. It'd suck to go through the effort of dropping the rear to find the problem is actually up front.
     
    Last edited: Apr 8, 2018
    My DSM:
    1996 Eagle Talon TSi AWD

    14b   automatic
    1997 Eagle Talon TSi AWD

    T25   automatic
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  12. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    Unfortunately, I forgot to unbolt the driveshaft for checking. I got the car up off the ground (all 4 wheels) and turned the front wheels, rears didn't turn. Then I drained out the gear oil from the diff. Just forgot about disconnecting the driveshaft.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
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  13. pauleyman

    pauleyman DSM Wiseman

    4,749
    812
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Did you turn both front wheels? If you turn one the oppposite one will spin since we have an open front diff. Basically I'm saying this won't tell you anything unless you grabbed both front wheels.
     
    My DSM:
    1997 Eagle Talon TSi AWD

    Street Build

    T25   manual
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  14. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    Yes, both front wheels were turned the same direction. I made sure of that.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
    Loading...
  15. pauleyman

    pauleyman DSM Wiseman

    4,749
    812
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    Now im curious what you'll find inside the trans.
     
    My DSM:
    1997 Eagle Talon TSi AWD

    Street Build

    T25   manual
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    Talon96fwd likes this.
  16. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    I could be wrong, but I feel the trans itself is fine. When I was trying to move the car out of the street when it broke, the trans was engaging, and would rock the car on its own, but the wheels wouldn't let it move much. I hope I'm not wrong. I'd rather have one of the others break instead.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
    Loading...
  17. shinzon

    shinzon Proven Member

    236
    39
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Still, could be the differentials in the trans...

    I don't know man, nothing you've posted absolutely convinces me that it's the rear, but since you've begun work on that end, you'll know one way or the other soon enough. I hope you're right, but somethings nagging at me because your symptoms are different than when I popped my rear on the highway. You should have had ample warning that something was wrong with the rear before it locked up completely in my experience.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    14b   automatic
    1997 Eagle Talon TSi AWD

    T25   automatic
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  18. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    Got under the car today and found oily residue everywhere on the chassis, exhaust, and driveshaft. I noticed it a little last weekend, but didn't think much of it. Noticed the t-case drain plug is missing, so there's the problem. Plug dropped, oil dumped, t-case seized. Now I'm looking for a replacement.
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
    Loading...
    Talon96fwd likes this.
  19. Talon96fwd

    Talon96fwd Proven Member

    171
    17
    Joined Apr 11, 2011
    Alexandria, Virginia
    While your at it and if you haven’t done it yet. You should check your mounts. As mine failed on me a month ago and caused me a rear diff and axles.
     
    My DSM:
    1996 Eagle Talon TSi

    14.184 @ 104.365 MPH
    Loading...
  20. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    Which mounts are you suggesting I check?
     
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
    Loading...
  21. TalonEsi_96

    TalonEsi_96 Proven Member

    125
    6
    Joined Dec 14, 2008
    Minot, North Dakota
    For the BFH rear diff I believe only the inner cups are different and the axles are the same as the non lsd. I was curious of the same thing and was told by multiple people though I cannot 100% confirm as I haven't done it yet on my GSX.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    Street Build

    20g   manual
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    spyderdrifter likes this.
  22. Talon96fwd

    Talon96fwd Proven Member

    171
    17
    Joined Apr 11, 2011
    Alexandria, Virginia
    My DSM:
    1996 Eagle Talon TSi

    14.184 @ 104.365 MPH
    Loading...
    spyderdrifter likes this.
  23. spyderdrifter

    spyderdrifter Supporting Member

    3,178
    251
    Joined Jul 11, 2009
    Colorado Springs, Colorado
    My DSM:
    1996 Eagle Talon TSi AWD

    Autocross Build

    16g   manual
    1997 Mitsubishi Eclipse Spyder GST (sold)

    Street Build

    T28   manual
    1996 Mitsubishi Eclipse GSX (sold)

    16g   manual
    Loading...
  24. Talon96fwd

    Talon96fwd Proven Member

    171
    17
    Joined Apr 11, 2011
    Alexandria, Virginia
    My DSM:
    1996 Eagle Talon TSi

    14.184 @ 104.365 MPH
    Loading...
    spyderdrifter likes this.
  25. jyntew

    jyntew Probationary Member

    4
    3
    Joined Jun 30, 2008
    everett, Washington
    Don't wanna steal the thread but anyone recommend replacing rear subframe bushings also while it's off? Or would it be okay. I'm in the same situation some what with the diff mount bushing worn out. Seems the seller is away and can't purchase those diff bushing mounts till they are back does anyone know another place to order?
     

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