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Thread: R380 gearbox grind

  1. 4th June 2015, 06:54 AM #1
    disco dan's Avatar
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    R380 gearbox grind

    Hi all

    My 87 rangie has a r380 gearbox in it and as of late it's been getting worse with gear changes. Second is the main problem but third is going down the same path. It's only when going up through the gears not down. Is this the synchros or slave cylinder as it runs out of fluid each week and when I fill it up it is smoother.

    If I have to rebuild is it worth it or should I just put an auto in. Kinda like the manual

    Cheers
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  2. 4th June 2015, 07:01 AM #2
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    funny how its smoother when there's oil in there!!

    how long has the box been leaking oil?
    "How long since you've visited The Good Oil?"

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  3. 4th June 2015, 07:12 AM #3
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    Quote Originally Posted by disco dan View Post
    Hi all

    slave cylinder as it runs out of fluid each week and when I fill it up it is smoother.


    Cheers
    There's your problem!!
    New master and slave cylinder required.
    Cheers......Brian
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  4. 4th June 2015, 07:16 AM #4
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    I only found out last week but have them both on order. Yes very funny about the oil. Wanting to confirm as was told could be synchros but had doubts after the oil.

    Cheers guys. Also what best place for parts
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  5. 4th June 2015, 08:30 AM #5
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    If the clutch isn't fully diss-engaging it'll likely crunch 'cos the synchros can't slow the gearbox shafts down with the drivetrain loads still partially applied to them. I'd suggest not driving it like this. If forced to, double clutching would be a lot kinder on the 'box.

    seeya,
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  6. 4th June 2015, 08:53 AM #6
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    Ok it's my only car but will do the double clutching from now.
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  7. 4th June 2015, 09:09 AM #7
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    Here's an idea .... double clutching will probably "pump" the clutch up anyway, so it'll fully dis-engage on the 2nd go either way

    seeya,
    Shane L.
    Proper cars--
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:
    '11 Poogoe RCZ HDI 6spd manual
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  8. 4th June 2015, 09:42 AM #8
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    Top up fluid DAILY, if double clutching does not help just moving the stick a little more slowly between the gears should help.

    Every time it grinds, the synchros (and gears themselves) are being damaged, the more you do it the sooner you will have to reco the box.

    Sent from my GT-S7562L using AULRO mobile app
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  9. 4th June 2015, 09:50 AM #9
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    They have an external clutch slave right? Your not filling the bell housing with oil I hope
    Proper cars--
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:
    '11 Poogoe RCZ HDI 6spd manual
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  10. 4th June 2015, 11:01 AM #10
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    Quote Originally Posted by DoubleChevron View Post
    They have an external clutch slave right? Your not filling the bell housing with oil I hope
    Good point!

    It is external but if it leaks out the rod seal its going into the clutch housing.

    Sent from my GT-S7562L using AULRO mobile app
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