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Discussion Starter · #1 ·
Hi all,

I'm new to autos and as far as I am aware ATF should be changed every so often. In the handbooks I can't find anything about the ATF change intervals on a 3.0 S-Type ('99, 5 speed auto).

All I can find is a passage that reads: "The rear axel (final drive unit) and automatic transmission unit (gearbox) will not normally need to be checked or topped up."

Is this correct, the auto transmission does not need to have the fluid changed, checked or topped up? Or will not changing the ATF result in an expensive paperweight?

Jim
 

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Hi Jim,

Although Jaguar say the auto boxes are "sealed for life", many forum members say that replacing the fluid and sleeve makes a noticeable difference to shifting.

I plan to do mine next year as the box has covered 115,000 miles and has a slight lurch - common on these. Supposedly a fluid change and resetting the software fixes this in some cases :)
 

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Discussion Starter · #3 ·
Hi Jim,

Although Jaguar say the auto boxes are "sealed for life", many forum members say that replacing the fluid and sleeve makes a noticeable difference to shifting.

I plan to do mine next year as the box has covered 115,000 miles and has a slight lurch - common on these. Supposedly a fluid change and resetting the software fixes this in some cases :)
Thank you very much, so although I have 114k on my car I shouldn't need to touch the ATF for a while as the gearbox was changed at 89k. The whole box/fluid only has 25k on it.

I was concerned as from what I've heard some auto boxes need fresh oil every 30k which would put me nearing that millage. If that's the case I will leave the transmission alone for now as it's smooth as silk and continue planning for the general annual service.
 

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Jaguar have a schedule on their tech site at least for the ZF box (the one with the lurch).

The OP has a different box (no lurch).

Pick your mileage, vary it with how harsh it is (how hot your climate is etc).

Say every 70,000 miles.

The OP's uses cheap fluid (Dexron III).

Even so, the parts wear.

Good idea to do the final drive lube, too, as no lube lasts forever.
 

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Discussion Starter · #5 ·
Jaguar have a schedule on their tech site at least for the ZF box (the one with the lurch).

The OP has a different box (no lurch).

Pick your mileage, vary it with how harsh it is (how hot your climate is etc).

Say every 70,000 miles.

The OP's uses cheap fluid (Dexron III).

Even so, the parts wear.
Cheap fluid... I like the sound of that. Even going by 70k I'll have about 5 or 6 years before I need to think about it, living down south (Margate) we seem to miss the harsh winters and I'll even be British and moan about the lack of summer :D
 

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ive been thinking of changing mine also, but working in a shop I know sometimes to replace "old, dirty, thick ATF" with
"fresh, clean, thinner ATF" then in fact can create a "slip" if you will.
or is sometimes not even recommended, so if the box is "unserviceable" do yall still think it should be done with no problem present but 118,000 miles.

my reason for wanting to change it out is because the previous owners hadn't changed ANY FILTERS at all my poor baby was having a breathing issue, just like me with asthma. lol
 

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sealed for life = sealed for death more like

I bought my XY at 62k miles and it hadn't been done, the transmission was serviced immediately and has been fine. I did have a slight problem a few thousand miles later, a whine from the rear diff which I had checked, it was more or less bone dry.

Luckily warranty stepped up and I had the entire rear diff replaced along with new prop shaft etc, cost around £3500 iirc

I hit 115k miles and I had the transmission serviced again, usually around every 50k miles and so although I had no issues with the rear diff, that was serviced too.

Point to note - my original 2008 rear diff had only the fill hole ( no drain plug ) BUT.......The replacement done around 2015 had a drain plug......what does that tell you??

Jim
 

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Discussion Starter · #8 ·
Ok, so it's looking like Jaguars recommendation is best ignored and I should change it at some point in the future when the millage on the box gets a bit higher. I'd guess that my diff won't have a drain hole as it's an older model, but sounds like it's worth attempting to check and top up every so often.
 

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Discussion Starter · #10 ·
Jaguar changed it many years ago (at least 9). Many people never noticed because they never use TOPIX (their tech site).
Thank you for that, I've just registered and even without a subscription active there's a wealth of information there including an in-depth guide on fitting a tow bar (something which I will be doing in the near future).
 

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Discussion Starter · #12 ·
I think for an enthusiastic DIYer it's very good but - sadly - vastly over-priced (for us).

Perhaps to be expected for such an up-market car marque.
I'd have to have a very serious job to do before I'd consider taking it to a garage. Usually my cars see a mechanic once a year for their MoT and occasionally if I struggle to diagnose something myself. Mind you though, I wouldn't have bought an almost 19 year old car if I didn't have the ability to do the work myself, it'd probably end up costing more than a new Jag in the long run :D
 

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I personally change oil on modern automatics every 100,000 km (60,000 miles) and engine oil 10,000 km ( 6,000 miles). For the 1999 S type the fluid needs to be Mercon V, not Dextron III. (Although there are quality oils that fit both requirements.) The transmission the Ford 5R55n, a version of which was installed about every US ford around those times. I had a version of it in my 2006 Mustang. Nice transmission, although people say it's a bit noisy. - Naturally I also change filter every time I change the oil.

The oil change is a bit more work than traditional automatics with dipstick, as you need to measure the level at oil in correct temperature, engine running and naturally do it all under the car. There are procedure guides floating around the interweb. It's not really that much work once you get around to it...
 

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I personally change oil on modern automatics every 100,000 km (60,000 miles) and engine oil 10,000 km ( 6,000 miles). For the 1999 S type the fluid needs to be Mercon V, not Dextron III. (Although there are quality oils that fit both requirements.) The transmission the Ford 5R55n, a version of which was installed about every US ford around those times. I had a version of it in my 2006 Mustang. Nice transmission, although people say it's a bit noisy. - Naturally I also change filter every time I change the oil.

The oil change is a bit more work than traditional automatics with dipstick, as you need to measure the level at oil in correct temperature, engine running and naturally do it all under the car. There are procedure guides floating around the interweb. It's not really that much work once you get around to it...
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Never use a multi-spec fluid in the ZF 6HP gearbox!

It's all lies, use Only single-spec Shell M1375.4 spec which is the original ZF Lifeguard Fluid 6.

You can get a 20 litre drum for £98 delivered to you from Smith & Allan, the UK Shell official distributor. It's red not gold but it's been verified by Shell as identical in spec.

We have a very long thread in our S Type Stickies about this research.

And Never trust an auto specialist who wants to put in generic 6 speed Auto gearbox fluid!
 
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