+ Reply to Thread
Results 1 to 13 of 13
  1. #1
    Registered Member
    Location
    , ,
    Member No: 48433 bern2280 is an unknown quantity at this point bern2280's Avatar
    Join Date
    Sep 2002
    Posts
    110
    Rep Power
    0


    Yes | No

    when putting into reverse for the first time

    on the initial start of the day, the gearbox grinds. As if the clutch is not pressed. The transmission fluid was changed over the summer. Any ideas???


  2. #2
    Registered Member
    Location
    , MA, United States
    Member No: 154164 F31Sailor is an unknown quantity at this point F31Sailor's Avatar
    Join Date
    Jun 2007
    Posts
    25
    Rep Power
    0


    Yes | No

    Re: when putting into reverse for the first time

    I get that too. I don't know if it is because the gear oil is thick or if my clutch is wearing thin.

  3. #3
    Registered Member
    Location
    , ,
    Member No: 30369 TLK is an unknown quantity at this point TLK's Avatar
    Join Date
    Mar 2002
    Posts
    2,137
    Rep Power
    0


    Yes | No

    Re: when putting into reverse for the first time

    Low fluid level, gearbox worn, air in clutch hydraulic system.
    TLK
    '93 325i sedan
    '98 M3 sedan

  4. #4
    Registered Member
    Location
    , ,
    Member No: 17062 JKRIT is on a distinguished road JKRIT's Avatar
    Join Date
    Oct 2001
    Posts
    2,203
    Rep Power
    18


    Yes | No

    Re: when putting into reverse for the first time

    or clutch dragging with pressure plate, which may have oil on it. Always shift into reverse directly from a forward gear (with the car stopped, of course), and this won't happen. When a gear is engaged and the car is stopped, the only thing turning in the gearbox is the input shaft, so you can shift to any other gear, including reverse, without grinding.
    '97 528i Montreal Blu./Grey
    '98 323is Arctic Sil./Blk, SP
    '95 M3 Cosmos Blk./Blk

  5. #5
    Registered Member
    Location
    , ,
    Member No: 48433 bern2280 is an unknown quantity at this point bern2280's Avatar
    Join Date
    Sep 2002
    Posts
    110
    Rep Power
    0


    Yes | No

    are u saying to put into 1st gear then to reverse?

    does it matter if the car is warmed up first?

  6. #6
    Registered Member
    Location
    , ,
    Member No: 17062 JKRIT is on a distinguished road JKRIT's Avatar
    Join Date
    Oct 2001
    Posts
    2,203
    Rep Power
    18


    Yes | No

    Yes, or any forward gear

    The forward gear synchros will stop the transmission gears from turning, and also stop the clutch disc, if it was dragging along with the pressure plate. A quick shift from the forward gear to reverse will engage reverse without grinding before the gears can be dragged up to engine speed again by the clutch. It makes no difference whether anything is hot or cold.

    Because your car seems to have a dragging clutch only when it is cold, you might use a forward gear other than first gear to stop the dragging. First gear synchros take the hardest wear anyway, and there is no need to burden them with this additional cold-start task.

    Alternatively, you can start the engine with reverse already engaged, but then you are asking the starter and ring gear to break the clutch disc free from the pressure plate.
    '97 528i Montreal Blu./Grey
    '98 323is Arctic Sil./Blk, SP
    '95 M3 Cosmos Blk./Blk

  7. #7
    Registered Member
    Location
    , ,
    Member No: 48433 bern2280 is an unknown quantity at this point bern2280's Avatar
    Join Date
    Sep 2002
    Posts
    110
    Rep Power
    0


    Yes | No

    ok i will try that, thanks


  8. #8
    Registered Member
    Location
    Omaha, NE, United States
    Member No: 128312 wizman007 is an unknown quantity at this point wizman007's Avatar
    Join Date
    Jul 2005
    Posts
    310
    Rep Power
    0


    Yes | No

    Are you saying that it is not good to start the

    car while the shifter is in the reverse gate? In early spring and late fall I sometimes do that because of the dedent issue with reverse when it is cooler out. It is easier to start it up and reverse right away.

  9. #9
    you might have a problem - TLK
    Guest
    Location
    , ,
    Member No: you might have a problem - TLK's Avatar


    Yes | No

    No only if your clutch is grabbing

    Hey Wiz,

    That entire discussion is based on the assumption that a person's clutch is not fully disengaged while holding the pedal down. This is true to some degree on a lot of cars, but the amount of torque coming through to the transmission is miniscule. Most rough shifting diagnostic procedures involve trying to confirm the presence of too much torque passing through and branching from there.

    Unless you have any issues with clutch engagement point, rough shifting, grinding, car moving with clutch pedal down, I don't see anything to be concerned regarding your parking in reverse.

    I admit being somewhat skeptical of the warning in the first place though. Even with a slightly grabby clutch, the starter is pretty capable of moving it it you leave it in gear and just hold the clutch pedal down. I mean the starter can rock the car if you leave it in gear with the pedal up. It certainly can spin the clutch disc free from the pressure plate if it is just a little grabby. I mean if it grabbed hard enought to fight the starter, my intuition in that you'd have a lot more problems than a one time cold start grind into reverse.

    My car had some kind of clutch issue when I got it. After 7 years, the previous owners had worn the clutch almost down to the rivets and the engagement point and effort was always annoying. It also had a bit more resistance going into gear. There are all kinds of things that can go wrong. The pressure plate springs often seem to get tough as they get older, the clutch disc can wear, the ZF transmission can have problems (all too common we've found out), the grease can be all gone from the spines on which the throw-out bearing slides on, and the clutch hydraulics can have issues. These things can all share the same symptoms and be a little vexing to figure out since most of these parts require dropping the transmission to access.

  10. #10
    Registered Member
    Location
    , ,
    Member No: 17062 JKRIT is on a distinguished road JKRIT's Avatar
    Join Date
    Oct 2001
    Posts
    2,203
    Rep Power
    18


    Yes | No

    Agreed . . . pretty much

    Why not make a habit of starting in neutral? Just because the starter CAN overcome lots of resistance doesn't mean you have to beat on it. That once every 5-7 years when you discover at the least convenient moment that your battery is just about gone, you'd be glad you didn't ask it for that little extra juice to break the clutch disc free from the pressure plate. This is where "habits" like starting in neutral come from.

    As for parking in reverse, as opposed to just starting in reverse, I don't like to abuse the centering spring by leaving it in the reverse gate for long times. They do sometimes weaken from this minor "abuse" and then you lose the centering function, at least from that side of the gate.
    '97 528i Montreal Blu./Grey
    '98 323is Arctic Sil./Blk, SP
    '95 M3 Cosmos Blk./Blk

  11. #11
    Registered Member
    Location
    Omaha, NE, United States
    Member No: 128312 wizman007 is an unknown quantity at this point wizman007's Avatar
    Join Date
    Jul 2005
    Posts
    310
    Rep Power
    0


    Yes | No

    Ah..I see..thanks


  12. #12
    Registered Member
    Location
    , ,
    Member No: 48433 bern2280 is an unknown quantity at this point bern2280's Avatar
    Join Date
    Sep 2002
    Posts
    110
    Rep Power
    0


    Yes | No

    So start the car put in a fwd gear then reverse?


  13. #13
    Registered Member
    Location
    , ,
    Member No: 17062 JKRIT is on a distinguished road JKRIT's Avatar
    Join Date
    Oct 2001
    Posts
    2,203
    Rep Power
    18


    Yes | No

    Exactly

    '97 528i Montreal Blu./Grey
    '98 323is Arctic Sil./Blk, SP
    '95 M3 Cosmos Blk./Blk

+ Reply to Thread


Thread Information

Users Browsing this Thread

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

     

Bookmarks

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
1e2 Forum