Differential Side Cover 156352 (Left Hand) | FerrariChat

Differential Side Cover 156352 (Left Hand)

Discussion in 'Boxers/TR/M' started by Dean B, May 17, 2013.

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  1. Dean B

    Dean B Rookie

    May 8, 2009
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    Dallas, Texas, USA
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    Dean B
    #1 Dean B, May 17, 2013
    Last edited by a moderator: Sep 7, 2017
    I need help how to replace O-Rings on differential side cover (left hand or driver side). I have removed axle shaft, 19mm bolt from the center of the transaxle flange, flange, vertical bolt, bell housing and pulled out propeller shaft. It’s very tight but I managed to pry it off for about 2cm. Is there something else from inside that holds differential side cover in place?
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  2. Philwozza

    Philwozza Formula 3

    Apr 23, 2009
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    Phil Worrall
    I think you have it all, perhaps just a little metal corrosion :(


    P
     
  3. Dean B

    Dean B Rookie

    May 8, 2009
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    In one of the older threads I just found following information: "There is a splash shield bolted to the edge of that cover next to the crown gear. You would have to remove the rear motor mount adapter cover to access that shield."
    I’m confused.
     
  4. tr512

    tr512 Formula 3

    Apr 12, 2007
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    Michael
    You cannot remove the side cover because the main shaft goes threw it plus there is a bolt that holds an oil tray.You would have to remove your clutch and rear differential cover .Big job
     
  5. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
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    #5 turbo-joe, May 17, 2013
    Last edited by a moderator: Sep 7, 2017
    he told that he removed the axle shaft. but right, he has to remove the complete clutch and diff housing because of the oil shield ( part number 45 in the drawing )

    but before I would do this job I would take some silicon to seal this cover instead of changing the O-ring
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  6. qwazipsycho

    qwazipsycho Formula 3

    Oct 30, 2004
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    Yes, Dean you're going to have to go much further. If you don't have the rear cover removed from the gearbox, that side cover isn't going anywhere.

    You're going to have to support the engine in the rear because you must remove the two motor mounts. Once the rear cover is off, you'll see why that side cover won't come out. the oil splash shield is in the way. Two bolts hold it in place.

    Also, the fit of this side cover is very tight. There are supports built into the case that hold the side cover in place. They hold it so tight, it's almost a press fit but it will move but hand. Sometimes it takes a little twisting of the side cover back and forth to get it to move.

    By the way, what year is your car? Since you're going to be in it this far you will definitely want to at least inspect your diff for cracks in the weld if not replace it.

    I am smack in the middle of this process right now so any questions, hit me up.
     
  7. Dean B

    Dean B Rookie

    May 8, 2009
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    Dean B
    My car is 1987 Testarossa, excellent condition with 13K miles. To use silicon and seal the cover is an option. My concern now is since differential side cover is pulled out for almost 1 inch did some damage occurred to differential side cover or oil shield.
     
  8. qwazipsycho

    qwazipsycho Formula 3

    Oct 30, 2004
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    I would say it's not very likely. You don't have it moved out far enough yet. Even if it did hit the splash shield, not much could happen to that.

    If you have to put it back together, you should be fine.
     
  9. Dean B

    Dean B Rookie

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    Dean B
    #9 Dean B, May 17, 2013
    Last edited by a moderator: Sep 7, 2017
  10. qwazipsycho

    qwazipsycho Formula 3

    Oct 30, 2004
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    Yes that's it. (the gear box is upside down by the way)

    As you can see, the bottom of the shield isn't too far away from the case. That's probably what's interfering. However, it's not likely you damaged anything.
     
  11. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
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    if you have not pulled hard I see no problem

    but please tell us: was oil draining from this cover? if yes I think that this cover is broken. I never had oil draining between the cover and the housing.

    so if oil was draining there I would as I mentioned before only take some silicone. first clean the surface of the cover and the housing and then put about 1 to 2 mm silicone all around and fasten the cover again. there can go no silicon inside, so don´t worry.

    but inspect this cover for may be breaking ! ! !
     
  12. Dean B

    Dean B Rookie

    May 8, 2009
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    Dean B
    For sure nothing is broken and also propeller shaft is perfectly fine. I have switched to gearbox oil Motul Gear 300 and after two weeks found this leak. Note that engine is out for the last 6 months (major service, belt replacement etc.) without gearbox oil. Diff side cover is pulled out for about 1 inch and original O-Ring look worn out (26 years old) compared to the new one. Since engine is already out I need good instructions how to remove the complete clutch. From there to remove rear cover and replace O-Ring on diff side cover shouldn’t be problem. Other side is easy job and that O-Ring will be replaced as well.
     
  13. turbo-joe

    turbo-joe F1 Veteran

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    you told us that the cover is out about 1 inch. so you can see the O-ring completly and also the notch where this ring comes in?
    then it is no need to remove this cover completely. just put the new O-ring on and wait 1 day until it has the same size than before. when you fasten the cover put a little oil to the ring that it will not be damaged.
     
  14. uzz32soarer

    uzz32soarer F1 Rookie

    Sep 9, 2006
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    Robert Hayden
    That picture above is mine upside down on the stand.

    I'm with Romano, if you have it out far enough to see the O ring, then slightly warm up the new O ring and stretch it gently over the housing. Walk away for a day or so and it will come back close to original size, then lube it well with rubber grease when you slip the cover back in.
     
  15. Dean B

    Dean B Rookie

    May 8, 2009
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    I can see the O-ring but the cover side is not out enough and the studs are in the way to replace the O-ring. I can’t pull diff side cover more that this so it seems that I have to go with the big job.
     
  16. turbo-joe

    turbo-joe F1 Veteran

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    oh sorry :( :( I forgot the studs

    so then take only some silicone.

    but when the complete engine is out it takes not so much more time to do it right: remove the clutchousing and the rear travers to take away this oil shield. then you can do a really good job and you are sure it is original. but if it will be ok??? :) so put a little silicone on also to make sure it is dry after
     
  17. tr512

    tr512 Formula 3

    Apr 12, 2007
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    Dean
    Check your side axle seal,I thought it was the o/ring to just before my diff went.
    I would remove your diff cover to check your carrier.It's not that big of a job if your motor is out.
     

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