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Thread: New LT85 oil issues

  1. #1
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    New LT85 oil issues

    I know there is a lot of info regarding oil selection for the LT85 online but I have a couple of questions anyway. I installed an Ashcrofts LT85 in my 110 around May this year. I filled it with TOTAL BV 75-80 MTF and have had no real issues except for annoying baulky gear changes especially into third. This happens even with sedate shifting. Just wondering if the crunchy changes are a result of too higher viscosity? The old box never had a problem with motor oil. Motor oil may solve my problem but Im not sure how it will go with heavy work on the gears regards to sheer etc.

  2. #2
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    oh and I was going to ask if Penrite 70 mtf would be any better?

  3. #3
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    Run ATF or Engine oil
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
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  4. #4
    dmdigital's Avatar
    dmdigital is offline OldBushie Vendor

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    As said use ATF - Dexron III or IV.
    MY15 Discovery 4 SE SDV6

    Past: 97 D1 Tdi, 03 D2a Td5, 08 Kimberley Kamper, 08 Defender 110 TDCi, 99 Defender 110 300Tdi[/SIZE]

  5. #5
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    I had a problem with baulky shifting until everything warmed up, and jumping out of second. Gearbox had been recently rebuilt - so I was told, and no reason not to believe po. Everyone reckoned the jumping out of second was a bent first/second shift fork.

    So, I put Syntrans into it, and bought myself a replacement gearbox.

    I reckon the shift fork got bent due to manful shifting when cold.

    Been running the Syntrans for a few thousand Kms, no problems with cold shift - and I've since moved to a cold place -and only jumps out of second on the odd ocassion on overrun.

  6. #6
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    I now use Castrol Syntrans 75W85. Expensive but the difference is worth it. Easier shifting and quieter. I use Castrol VMX80 in the transfer.
    URSUSMAJOR

  7. #7
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    ours is very smooth, with no synchro baulks even when cold since changing to Castrol Syntrans 75 85.... with the added benefit of extended period/ks for transmission oil changes

  8. #8
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    I drained the gearbox today and noticed the oil had a grey appearance to it with very very fine metallic flecks in it that would not settle. Perhaps this is partly due to some sort of assembly grease? I bought some Penrite 70-75 synth and managed to get it in my eyes and on my shoulder. That drain plug and filler plug on the 110 is a real pain(directly above the crossmember). Once it was going the whole thing was a lot quieter and shifting is noticeably better. Shifting into third from fourth is now perfect but 2nd into third is 50% of the time nasty. Why would all the other shifts be sweet except this one?

  9. #9
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    The book says BP Visco 2000, that's all I have ever used and no problems.

    Regards
    Maggsie
    04 V8 Disco
    85 V8 County

  10. #10
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    I'm running Castrol VMX 80 in my LT 85 gbox and LT230 transfer which is a Light weight, extreme pressure GBox oil, which is light enough to make the gear changes very smooth, but still is a gbox oil which engine oil isn't. The viscosity of engine oils cannot be compared directly to gbox oils as the measurements are different. This oil was recomended to my by a mechanical engineer, which did 30years in the lube business in the hunter valley coal mines. This is the oil he ran in his 101 in the gbox and transfer. The oils is more expencive that the oil you probably use but the gear changes are smooth and light, you don't get that horrible clattering noise when idling and it is a gearbox oil and also meets the specs in the county manual. My box has only ever jumped out of gear twice. I have pulled the box apart since and found a broken circlip as in my posting on that. ATF has reduced lubrication properties to allow the clutch packs to grip in an auto box. If you put VMX 80 in an auto box the clutch packs wont grip. Would you put ATF in a manual gbox? ATF is great if you like rebuilding them. It is for automatic boxed only! Gearboxes always make metal, thats why the manual tells you to change it, so it doesn't turn grey and put metal through you bearing it also reduces wear on the main shaft in the transfer which is another catch in these boxes as well as 1st, 2nd selector fork wearing out. Tim

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