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jamesSE4x4R
Member Since: 09 Mar 2016
Location: kent seaside
Posts: 176
  
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Morning All
A few years back Geoff flushed my old 6 speed for me but then I gather he subsiquently stopped, I have since changed vehicles and upgraded? to an 8 speed. are there any indies that offer 8 speed flushing in Kent? www.southeast4x4response.org.uk Responder of 9 years service SE140
Ex defender 50th owner, GB165
2010 MY XS -sold
2014 MY HSE Lux curent
2017 MY Disco Sport (wife's)
" if it fly's, floats, is fast or fornicates you can't afford it my boy" RIP Gramps 2009
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 14th Jan 2021 10:54 am |
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jamesSE4x4R
Member Since: 09 Mar 2016
Location: kent seaside
Posts: 176
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Still looking for a flush in kent if anyone knows of a service? www.southeast4x4response.org.uk Responder of 9 years service SE140
Ex defender 50th owner, GB165
2010 MY XS -sold
2014 MY HSE Lux curent
2017 MY Disco Sport (wife's)
" if it fly's, floats, is fast or fornicates you can't afford it my boy" RIP Gramps 2009
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| 5th Aug 2022 8:58 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Just get a local indie to do a oil & filter change with the correct oil, no amount of flushing will clear the filter.
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| 5th Aug 2022 9:31 pm |
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Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731
  
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Issues are caused by dirty oil, not a dirty filter
If the filter is blocked, your going to be suffering from major issues that no amount of oil/filters will cure... My D3 Build Thread
TDV8 Retrofit Build Thread
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| 6th Aug 2022 6:47 am |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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So why change the filter?
Clearly if it's 'blocked' there are issues and the shift quality would get progressively worse as it becomes restricted.
Other manufacturers using ZF (and other) transmissions have an oil & filter change in the servicing regime, no manufacturer that I'm aware of, certainly none of the marques I've worked for, have a process to change the transmission oil by 'flushing'.
Having experienced the 'night & day' difference in transmission shift quality after oil & filter change, especially when it's overdue (on customers vehicles I hasten to add), I would personally never entertain anything other than using the specified oil and changing the filter. Yes, I did add 30ml of Shell anti-foaming agent to mine, which is over & above the requirement.
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| 6th Aug 2022 7:36 am |
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Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731
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There is no "flushing" schedule, as not all flushing machines are equal
You can buy a machine for less than £500, but the risk of damage to the transmission is very high
Flushed properly, with the correct equipment and oil, there is very little risk
As for the filters inside the 6/8HP boxes, they are of a coarse plastic construction. You can see daylight through them. They are only there to catch big lumps of debris (which we've already concluded is a bad thing)
The smaller particles pass through, and get pushed through the gearbox over and over, causing wear...
A gearbox will last longer with regular flushing, than it would with oil + filter replacement at the same intervals  My D3 Build Thread
TDV8 Retrofit Build Thread
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| 6th Aug 2022 8:01 am |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Interesting that you mention risk values of flushing - I hadn't considered that. Of course, there is zero risk (as long as the manufacturers work instruction is followed) in carrying out the recommended oil & filter change with the correct parts & fluids. It's clearly something we're never going to see eye-to-eye on so i'll not pollute the OP's question any further.
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| 6th Aug 2022 9:31 am |
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Oswiperus
D3 Decade
Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590
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Dartford transmissions are also a LR indi, not used the myself but I'm sure some on here have over the years and not heard anything bad.
https://www.dartfordtransmissions.co.uk/ Stu
2016 D4 Landmark current
2022 Defender D300 SE Gone 
D4 2014 XS Commercial - Gone
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone
D2 1999 TD5 E white - current
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| 6th Aug 2022 11:49 am |
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Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731
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Dartford Transmissions are a JLR specialist, as well as a transmission specialist, and have nothing bad to say about gearbox flushing, under the correct circumstances My D3 Build Thread
TDV8 Retrofit Build Thread
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| 6th Aug 2022 9:26 pm |
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