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dinger645



Member Since: 07 Jun 2020
Location: lincolnshire
Posts: 3

United Kingdom 
2008 3.6 gearbox issue

Hello, first time poster here and I have a problem.
Something is not right with my gearbox. When its warmed up and I accelerate normally (not booting it) the revs fluctuate and when it gets to 3rd and 4th gear (I think) it seems like its changing up and down rapidly. also the rev counter flutters a bit when cruising.
When I boot it the problem seems worse with the rapid changing.
The revs still fluctuate even in manual mode, I have trawled the forums and the net and found things like the solenoids need changing or the torque converter is duff.
Any help would be appreciated as I don't want to spend money on one thing to find out its another.
cheers.

Great forum by the way.

Post #559862 2nd Jul 2020 4:14am
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maric995



Member Since: 04 Apr 2019
Location: zagreb
Posts: 58

Croatia 2006 Range Rover HSE 4.4 V8 Zambezi Silver

Hi,
When was the oil in the box and filter (pan) last changed? I would start with this for beginning. Use land rover TKY 500050 suitable oil. That would be zf lifeguard 6 or something that must have this specification. I am using liqui moly atf 1800 at the moment. RR HSE 4.4 2006 LPG

Post #559863 2nd Jul 2020 5:41am
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DrRob



Member Since: 16 Apr 2015
Location: Petersfield, Hampshire
Posts: 4201

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

Agreed, get it serviced by someone who knows these gearboxes... Thumbs Up 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order so "Rory" will be going to a new home....!
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Post #559871 2nd Jul 2020 7:13am
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dinger645



Member Since: 07 Jun 2020
Location: lincolnshire
Posts: 3

United Kingdom 

Thanks guys
I have no idea if the oil has ever been changed so I think I will get this done first.
Did you notice a difference in your gearboxes after you had yours done?

Post #560035 3rd Jul 2020 1:06am
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Fox889



Member Since: 04 Jun 2019
Location: Bury St Edmunds. Suffolk
Posts: 656

United Kingdom 2012 Range Rover Westminster TDV8 Orkney Grey

In your instance I would suggest a 'megaflush' where 99% of the oil is flushed out & replaced rather than a 'oil & filter' change which only gets 40%-60% of the fluid out.
Budget £300-£400 for this hopefully. If you're oil is shagged you'll soon notice the difference. 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
BMW R1200GS
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC

Post #560039 3rd Jul 2020 6:58am
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Gunni



Member Since: 13 Jan 2018
Location: Dorset
Posts: 16

United Kingdom 2009 Range Rover Vogue SE TDV8 Stornoway Grey

My experience for what its worth
Had mine megaflushed at 90k miles just after I bought it. Not sure this was a good idea just drain and refill sounds kinder to the box. Don’t reset adaptations. It will not do it any good apparently.
Started to get Rev fluctuations And clunky changes and what felt like slipping clutch.
Then the vibration started on the torque converter and changed at 105k mikes including gen filter and zf oil.
Haven’t done any solenoids and so far all good. Now on 115k Smooth as silk but not a cheap job. Should have done it all together and saved the first flush and oil fill.

Only my opinion but think the tc shudder will come about at some point So get it out of the way and enjoy the smoothness and knowledge you won’t have to pay out again. I wish I had. Jon
2009 3.6 TDV8 Vogue SE
Previous Land Rovers
Series 2 Land Rover petrol - loved it and want another
Range Rover classic v8 - loved it But glad i sold it
Series 3 Land Rover - Steering lottery But useful.
Land Rover v8 90 - Fast dirty & drank Fuel like a Boeing 737.

Post #560102 3rd Jul 2020 2:46pm
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 7878

England 2014 Range Rover Autobiography SDV8 Loire Blue

maric995 wrote:
zf lifeguard 6 or something that must have this specification.


Nothing has the same specification of the ZF oil no matter what it says on the bottle, the oil will be to the same spec but it will not have the friction modifiers that the ZF oil has..! Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #560179 4th Jul 2020 10:19am
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WB



Member Since: 26 May 2016
Location: London
Posts: 301

United Kingdom 2010 Range Rover Autobiography 5.0 SC V8 Santorini Black

Have a read on the ZF website and give ZF customer support a call. The ZF process is to drain, replace the sump/filter with a new one and fill with ZF oil they do not recommend a megaflush. After all would you change engine oil and leave the dirty filter? Bear in mind the age of your filter... I know there are fans of the the megaflush on here but best to do your research.

Post #560232 4th Jul 2020 4:59pm
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nick4275



Member Since: 28 Sep 2018
Location: Bewdley
Posts: 51

United Kingdom 2007 Range Rover Autobiography TDV8 Zambezi Silver

Been there done that - fingers crossed for you.

Try a tube of Dr. Tranny instant shudder fixx (yes it's a real thing) and costs next to nothing

I did with mine and it did the trick for a while although ultimately it was the torque converter and I had to have it replaced. Sorted all issues immediately.

Post #560398 6th Jul 2020 6:20pm
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dinger645



Member Since: 07 Jun 2020
Location: lincolnshire
Posts: 3

United Kingdom 

Update.
I changed the oil and filter (with ZF lifeguard 6) and while I was in there I replaced the valve body seals and tested the solenoids. All the solenoids were good so I slapped it all back together and it is running a lot better, not perfect but there is a vast improvement.
I am guessing the reason its not perfect is the fact there is still some crappy oil in there.
I'll keep you posted Smile

Post #562338 22nd Jul 2020 11:04am
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