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Thread: Disco 3/4 Automatic Transmission FAQ - 6 Speed

  1. #561
    Matty_P is offline Fossicker Silver Subscriber
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    Quote Originally Posted by rar110 View Post
    Tdv6 or v6? Either way you did pretty well.

    Maybe consider a trans service. This era 6HP26 has the lead free stator bush.
    Had some issues with the gearbox since i purchased the D3. Its throwing up F on the dashboard and message similar to Transmission fault limited gears available.

    Long story short - its booked in with Transmission Centre at Underwood. The owner Scott gave me 30 min of his time, checked for fault codes and found two saying slipping in 5th gear. He cleared the codes no charge gave me a 20 min lesson on the ZF box as well as showed me the differences between the current plastic pan and the metal version with filter. Awesome guy generous with his time considering i havent given him any money.

    Interesting discussion about the Life Guard 6 oil ---- he doesnt use much of it, only if its a car under warranty. Cant remember the exact name of the oil he uses - its either "Regal" or "Regent". He does a lot a ZF boxes and said he uses the non LifeGuard oil for 95% of services / rebuilds. He said that LifeGuard 6 at the time had a patent around some of the additives that it used, this patent has since expired and the other oil providers have caught up. Im booked in Friday week for pan change and service, fingers crossed it fixes the problem - he said 50-60% chance it will given the limited amount of errors the box is producing.

    Matt P

  2. #562
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    Quote Originally Posted by Matty_P View Post
    Had some issues with the gearbox since i purchased the D3. Its throwing up F on the dashboard and message similar to Transmission fault limited gears available.

    Long story short - its booked in with Transmission Centre at Underwood. The owner Scott gave me 30 min of his time, checked for fault codes and found two saying slipping in 5th gear. He cleared the codes no charge gave me a 20 min lesson on the ZF box as well as showed me the differences between the current plastic pan and the metal version with filter. Awesome guy generous with his time considering i havent given him any money.

    Interesting discussion about the Life Guard 6 oil ---- he doesnt use much of it, only if its a car under warranty. Cant remember the exact name of the oil he uses - its either "Regal" or "Regent". He does a lot a ZF boxes and said he uses the non LifeGuard oil for 95% of services / rebuilds. He said that LifeGuard 6 at the time had a patent around some of the additives that it used, this patent has since expired and the other oil providers have caught up. Im booked in Friday week for pan change and service, fingers crossed it fixes the problem - he said 50-60% chance it will given the limited amount of errors the box is producing.

    Matt P
    Over a week without flames for not using LG fluid? What is this forum becoming? Tombie has been quiet. I hope he’s ok?
    I don’t use LG but use Motul ATF VI which is their claimed equivalent. I’ve been using it for four years in a trans with 200k km when I acquired and previously original fluid. So far so good. I change it annually dropping 5L and replacing so slowly diluting the original fluid. It’s now 253k km.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  3. #563
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    Penrite now have a LG6 equivalent trans fluid ‘ATF BMV’.

    ATF BMV may be used in ZF 6, 8 and 9 speed automatic transmissions where Lifeguard 6, 8 & 9 is recommended in vehicles”

    ATF BMV (Full Syn) | Penrite Oil
    2014, MY14 Discovery TDV6, Fuji White (2018-Now)
    2003, Discovery 2a, Td5 Manual, Zambezi Silver (2012-2018)
    2007, Adventure Offroad Campers, Grand Tourer (2015-Now)

  4. #564
    Matty_P is offline Fossicker Silver Subscriber
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    Quote Originally Posted by DiscoJeffster View Post
    Over a week without flames for not using LG fluid? What is this forum becoming? Tombie has been quiet. I hope he’s ok?
    I don’t use LG but use Motul ATF VI which is their claimed equivalent. I’ve been using it for four years in a trans with 200k km when I acquired and previously original fluid. So far so good. I change it annually dropping 5L and replacing so slowly diluting the original fluid. It’s now 253k km.

    Well Dr tranny and a mega flush didnt fix my issue so forked out $4500 and had the box reconditioned including TC and valve body. Been driving for a couple of days no issues, the tacho hunts a little bit in the 1000-1300 range but not too concerned at this stage as i guess the box needs to settle back in and relearn my driving habits.
    Fuel economy has improved from a solid 10.4 ltrs/100 to 9.7-10.2ltrs/100.

    Looking forward to getting off road now that i have some confidence in the box.

    Matt P

  5. #565
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    Quote Originally Posted by Matty_P View Post
    Well Dr tranny and a mega flush didnt fix my issue so forked out $4500 and had the box reconditioned including TC and valve body. Been driving for a couple of days no issues, the tacho hunts a little bit in the 1000-1300 range but not too concerned at this stage as i guess the box needs to settle back in and relearn my driving habits.
    Fuel economy has improved from a solid 10.4 ltrs/100 to 9.7-10.2ltrs/100.

    Looking forward to getting off road now that i have some confidence in the box.

    Matt P
    Pretty reasonable value.
    L322 tdv8 poverty pack - wow
    Perentie 110 wagon ARN 49-107 (probably selling) turbo, p/steer, RFSV front axle/trutrack, HF, gullwing windows, double jerrys etc.
    Perentie 110 wagon ARN 48-699 another project
    Track Trailer ARN 200-117
    REMLR # 137

  6. #566
    Matty_P is offline Fossicker Silver Subscriber
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    Quote Originally Posted by rar110 View Post
    Pretty reasonable value.
    Yep price was reasonable and I will get about $1700 back from the dealer on warranty....pitty i forked out for the mega flush.....that said i had the pan upgraded at the same time.

  7. #567
    Rockylizard Guest
    Gday...

    Looking for advice ... probably more like reassurance.

    Background:
    Discovery 3 2.7TDV6 auto. Has 255,000Km on clock now. I bought in 2010 with 72,000Km.
    I tow a 2,600Kg van - have probably done 100,000Km+ with the van on.
    Auto fluid/filter flushed and changed at 80,000Km and steel pan fitted.
    Fluid/filter changed at 150,000Km and Dr Tranny inserted, fluid/filter and flush and Dr Tranny at 200,000Km, fluid changed and Dr Tranny at 250,000Km.
    Dr Tranny only used as 'insurance' as all gear changes have always been smooth and faultless.
    Box has been perfect for the last 5,000Km since last fluid change except for today.
    Yes, I am probably reacting too quickly.
    Today, without the van attached, it makes a clunk changing from 1st to 2nd when taking off very slowly - slight throttle.
    If I take off 'briskly' no clunk, but it is not as smooth (sort of slower change up) as the change from 2nd to 3rd and upward.
    Changes down automatically through gears without problem - smoothly as always ... until I am about stopped and as I stop, there is a clunk as it changes back to 1st.
    Other than that, I am very happy with the box and its changes.
    I have never had a shudder or any other indication of anything untoward in the whole time I have enjoyed this great vehicle.
    Any ideas from those who know much more than I?
    Cheers - John

  8. #568
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    Mine’s similar age @ 254,000 km. Mine also has a slight clunk when going 2nd to 1st stopping. I’ve never let it bother me. It’s also a touch rougher when cold for 1st to 2nd and 3rd but smooths out when warm
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  9. #569
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    In my view Dr Tranny is a band aid solution - I dont think I would have been using it in a good condition, well serviced gearbox. I am not sure what the long term implications of its use are. I am not a person who believes in additives in normal circumstances but I do accept that Dr Tranny in a gearbox/TC that is starting to play up is a good stop gap until the underlying condition can be dealt with.

    As to your issue, sounds more gearbox rather than issues in the torque converter where Dr Tranny has the biggest positive impact - all I can assume some of the wear components in the gearbox are starting to play up and may need replacing but from the description I cannot suggest what it might be.

    There have been threads in the past months of people rebuilding some bits themselves so maybe they will come along with some advice.

    Good luck with it.

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  10. #570
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    John, mine clunks from 1st to 2nd when cold. It also clunks when taking off after coasting (with the dreaded indecisive delay). Apart from that it drives just fine. It has 187k km.

    I'd suggest driving it around in sport mode and see if that makes a difference, as it may just be the programming. I've heard if you drive it like you stole in sport mode for a day or two, then change back to normal mode, the gearbox kinda relearns your driving habits.

    Give it a go and let us know how you go.

    Cheers

    Dan
    FINN - '72 88" S3 - 2.286 petrol - yet to go on it's first adventure
    SOLD - '08 D3 4.0 V6 - 265/65/R17 on X5 rims
    GONE '96 D1 300Tdi - 2" lift, 32" tyres, HD rear axles, lockers :(

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