ZF5HP24 Fluid drain and Filter Change....

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Saint.V8

Dyed-in-the-wool 100% RR Junkie
Full Member
First things first....

Tools required:
8mm Allen key for Sump and Fill/Level plugs
T27 Torx bit for Sump bolts and Filter Bolts
Pliers
Stanley Blade/Gasket Scrapper/Wide Screwdriver
Plenty of Rags
Drip Tray
Receptacle for Oil
Method of refilling (I used a pressure sprayer attached to a length of flexible hose)
Degreaser/cleaning products
SAFETY GLASSES

Always use the correct grade of ATF for the L322 Gearboxes – considering the price of this stuff, shopping around helps.
I bought 7 litres from a local VW/Audi place as theirs was the cheapest I could get hold of in the time I had....£11.70 a litre with the VAT. LR was £14 odd plus the VAT so was about £16-17 ish a litre...
VW part number G-052-162-A2

Process:
Raise Vehicle – Now before everyone goes bandy, I know driving up 4 ramps is a no-no, but I needed access underneath for a larger than average person and also have the vehicle level to drain and refill the box.
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Climb underneath and laugh at the ‘Filled for Life’ sticker.. :D
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On first inspection underneath, it looks like there has been a fluid leak from the front corner of the sump
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Hmmmm....

OK, now before you do anything there are couple of Must Do steps

Spray some penetrating fluid on to the sump bolts, drain and fill plugs
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Make sure you have a viable and working method of refilling the box, I used a cheap pressure Fence Sprayer from Homebase (£14.99) and took the little plastic filter off the end of the delivery tube, cut the yellow plastic tube shorter and attached some flexible hose to that so I could feed it into the fill hole.
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Now this probably the most important part – make sure you can undo the fill level plug BEFORE you drain the oil out, I cannot stress this enough – if you can’t get it back in – you’re fecked !!!!
I was quite shocked just how tight the fill/level plug was – I am a rather large lad, and it took both hands pushing hard on a long Allen key to budge it....
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Crack open but don’t drain the Sump Plug
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Now go round the 22 Torx bits on the sump and only crack them open, don’t undo just a tweak....

On the side of the Sump is a metal plate covering the Selector switch...the official procedure is to remove this, but looking at it, and knowing the hassle caused if the selector isn’t set properly, you can just bend the side tabs back to allow the sump to be dropped.
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Position your Oil Receptacle under the sump plug, remember the sump can contain 4.5 to 5 litres (sometimes up to 5.5 if not more litres)
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You can now undo the drain plug....
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The residual oil on my plug doesn’t look to bad!! Nor did the stuff coming out of the sump!!

The odd thing was I could only get about 3.5 litres out of the sump.....I have read and re-read articles and posts on the internet and I am sure I should have got more out of it – is this a sign??
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Now, never having taken a Gearbox sump off before, I don’t know a) how heavy it is or b) how much oil is left that couldn’t be drained....so I used my large Trolley jacl set just below the pan, and started to undo the 22 torx bolts....count them off so you can count them on....!!!
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I had about half a litre left in the sump when it was removed, so be carefull when removing it, and remember part of the sump sits above the gearbox protection cage, so you’ll have to wiggle it past that....
At first look, the oil looks clean to my untrained eye....slight tan colour to it, doesn’t smell burnt, still has the typical LT71141 fishy/odd smell to it, no sludge, no fillings, no glitter, no swarf, no bits, no grit, nothing....just oil!! Took a bit out and smeared it on white paper, no suspended debris, no odd colour, no blackness....just a tan/brown oil!!
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The magnets in the corners don’t look too full of fillings, according to a thread on rangerovers.net they usually and should look like that....infact the comparison photo they showed was worse than mine!
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Ok, so looking at the sump pan, oil and magnets, nothing looks out of place and infact looks a damn sight better than I had expected.....
Attention turns to the filter....
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It is held in by 2 T27 Torx bolts, undo these and then pull the filter from the valve block , a little tug to over come the O ring seal, and be prepared for a splodge of oil and further oil to catch....
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Looking at the filter, there is again no sludge, no sign of metallic debris, no burnt smell, no swarf....just brown/tan coloured oil....
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So, after draining the oil I can summise the following....
No Black sludge
No Metal Fillings
No Glitter suspended in the oil
No Swarf
No Gritty bits
No Burnt Smell

Now while I am not saying there is nothing wrong with the box, maybe I have caught the demise early, maybe I was imagining it, maybe it is low on oil causing reduced hydraulic pressure???
The oil and filter certainly don’t seem to carry all the usual signs of failure....hmmmmm.

Time to clean the old gasket off the box and sump....that bit was the part that took the longest....you really should take your time and ensure you get all the old gasket off to ensure a good sealing surface. I used a Stanley blade and a screw driver (be careful not to score the mating faces)

Anyhoot, time to put it all back together.....

New Filter, O Ring and Sump Gasket (Genuine Land Rover parts sourced from Hunters Land Rover in Guildford), place the O Ring over the opening on the top side of the filter
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With a little push to overcome O Ring seal, place the filter on the valve block and do up the 2 Torx bolts
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Clean the sump using a good degreaser, clean the magnets and fit the new gasket....I smeared a bit of fresh ATF onto the sump lip to hold the gasket in place during fitment...
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Put the sump pan back on, I placed two opposing corner bolts in first and held it loosely while I put the other two corners in....then one by one fit the other 18 bolts....count them back on remember...
Make sure you have the gasket seated correctly as you put the bolts in...once you have them all in, start nipping them up in a cross pattern to ensure the pan sits square and not twisted....
For the awkward one above the Protection frame, I used a spring drive to get the bit onto the bolt head
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Time to prep for the fill.....pour new fluid into the pressure sprayer.
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Open up the Fill/level plug and place fill hose into hole...
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Pump up the sprayer and start to fill......
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The initial fill must be done with the engine off, the first fill will be about 4 litres or so to fill the sump to the fill level.
When you start to get a thin line from the filler hole, start the engine and with foot firmly on the brake, go from P through R to N then on to D pausing for 2-3 seconds in each to begin refilling the valves and oil galleries....

Go back to P in tha same fashion pausing in each...start the fill once again until you get a thin bead again, then again cycle the gears.....back to P.....wait for the Gearbox oil temp to reach around 40degC (measure using am IR thermostat or similar or those with money can use a diagnostic to monitor the GB temp)

When it is up to temp, keep filling until you get another thin line from the filler plug, and remove the fill hose and put the plug back in....DO NOT TURN THE ENGINE OFF UNTIL THE FILL PLUG IS BACK IN as the GB pump will stop and all the fluid in the cooler and Torque Converter will drain back to the sump and pour out of the fill plug again!!!
I managed to get all 7 litres in...!!!!!!

Clean up and grab a coffee....all done!

CONCLUSION and FINDINGS:
Well considering all I have read suggests I should get between 5 and almost 6 litres from the sump/ filter etc....(the GB takes 9.9 litres from dry, but you will have 4.5-5 or so left in the TQ) I only managed to drain at the very most 4.5 litres....
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BUT I refilled with 7 litres, which, considering the condition of the oil, leads me to suspect that my issue was concerned with the fluid level dropping to a point where hydraulic pressure was reduced causing clutch slipping....

Now I am not a Automatic box specialist, but to me the oil drained looked good (for 10 years old), the magnets and pan where clean, no burnt smell, nor anything untoward....
After getting it off the ramps a quick 15 minute drive should no ill effects, and whilst a longer drive will be more conclusive, there was no judder at 25-30 and only a faint hint at 40ish, but I couldn't tell if it was GB related or road condition....

Will give it a few weeks and see what happens....

Time taken was about 6 hours (I like to take my time) and it was very messy! :D:D:D
 
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I did the oil change pretty much along the tutorial of Saint.V8
Thanks for the tip on bending the tabs to clear the oil pan.
I was able to get slightly over 6 litres in there.
Back from a test drive I am happy to report the previous torque converter resonance at lockup is all gone ! My gearbox never had an oil change and now at 160K kilometres the resonance phenomena signalled it was make or break. I used a more expensive Meyle oil change kit, 7 bottles of oil, gasket,filter, screws, oil plugs and even magnets that weighed in at appr 200 Euros incl postage.
A bargain anyway compared to having handed the car in at the LR authorized service facility.

The screws and especially the filler plug sat hard; the term "crack open" was very real. I would not recommend too thin tools here. I was lucky to have a friends pro level oil plug socket kit nearby.

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The Meyle kit, see http://www.ebay.de/itm/261688419585
The german seller have an error in their catalog so it says that kit fits Range Rover mid 2005 onwards when it is really from 2002 to mid 2005. I was able to convince them and they finally shipped.
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I used a smart and cheap two way pump. Pull the handle and it sucks oil from the bottle, push it and it pushes the oil into the gerbox filler hole. It was a mess anyway with the wiggling bottles and some oil spill. But this setup did the job.
 
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Hmmmm...it does state LT71141 as a spec...but that is Straw coloured and yours is red (cos it is basically Dexron III) there has been discussion recently on if DexIII is actually LT71141 equivalent...hope it works out for you!
 
Hmmmm...it does state LT71141 as a spec...but that is Straw coloured and yours is red (cos it is basically Dexron III) there has been discussion recently on if DexIII is actually LT71141 equivalent...hope it works out for you!
I have not been able to provoke that lock up resonance in any way since the oil change. The box works as well now as it ever did. It tells me anyone with that filled for life oil still in there at high mieage should consider the change.
 
When I changed my filter I used the recommended oil to refill and got in about 6.5 litres.

Because it is virtually impossible to get all of the old oil away I took mine to Terrain at Bexhill on the south coast for a full flush. The result was very noticeable with all the little symptoms now gone. They use Dexron III and won't use anything else even if you take it along like I did!!! Highly recommend them.

The flush is the only way to be sure that all the old stuff is out. I was surprised how dirty my fill was after just a couple of weeks. You could of course get them to do the filter change as well - but where's the fun in that!!!
 
Great post mate.

Had an absolute mare today trying to change my oil and filter. Not one single one of the 22 torx bolts would budge. I snapped 2 27torx bits in the process - no cheap ****e either. They were sprayed in release oil and left to penetrate. I also shocked them with the torx bit and hammer to release. Nothing worked. I had to just fill it back up with oil. Not happy.

Anybody else had this happen? Is it a sign of overheating of something?
 
Really wonderful and complete report of how to change gear oil step by step i just bought this car really i have issue in my gear box and i was looking for this steps i dont know if you can help me to find this issue

My car Range Rover 2005 end of 2004 v8 L322 my issue is when start car and move my gear to D then move during transmission change from gear 1 to 2 some thing happen like slepping or hard change then error message coming means gear box moved to safe mode then car moving normaly all my way but car moving heavy when stop on road and againe move but shifting normaly till swich car off

I have delphi scan tools check i found this issue output shaft speed sensor

I found in car old sensor was there i think old owner changed but i'm confused is this from this sensor or from valve body slonoides valve

If you can advice will be befrectly

IMG_1887.JPG

Thank you
 
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