When I replaced my filter I "just" used my air hammer on 15 of those little guys...I've had more fun cleaning the kitty litter!

wj

 

@Atlastajag1 - guess I was just lucky as they all came out without any drama. The car was in pieces for some time as I was doing pm over the winter. I just gave them all shots of penetrating oil a few days prior. Some of the filter kits come with a set of T40s, which ZF eventually got around to using sometime during the 6HP26 production.

 

The T40s are the replacements and I keep a few bags of 'spares'.

I use the old T27 as M6 weldable studs for projects.

 

Hi Billy Clyde,

Have you scanned the ECM & TCM for trouble codes? Often a fault like the one you are experiencing will trigger at least one code that will help narrow down the diagnosis. Look for TCM, ECM and Network/CAN codes.

Are you certain the fluid level is correct at 80°C? Any signs of leaks?

Common problems with the 722.6 include fluid contamination of the electrical connector pins due to leaking seals on the connector sleeve, a broken pressure regulator spring (in the valve body - Sonnax makes a repair kit), and intermittent failure of one of the speed sensors on the conductor plate. It is possible to replace only the two sensors (search eBay), though it takes a bit of skilled work. New conductor plates are available from M-B parts sources.

Cheers,

Don

 

I think Billy C has a 4.2, not the 4.0 XKR. If so, he doesn’t have the Mercedes 722.6 transmission.

one question: are you referring to a specific vendor having the 722.6 conductor plate ? My favorite place for 722.6 replacement parts is Pelican Parts, and I don’t think they sell the genuine MB 722.6 conductor plate anymore, just aftermarket copies.

Sad.

If you know of other vendors still selling the genuine MB part, please post the link to same.

I occasionally see one still in the Mercedes box on eBay for sale, but that’s it.

I bought a 722.6 conductor plate on eBay a few years ago that was supposed to be a genuine M-B part, but it was a counterfeit, and it has had occasional spurious false “high transmission temp” warnings every since I installed it.

Lesson learned. Counterfeit OEM parts are the norm on eBay, not a rarity.

Z

 

Hi Z,

You're right - his signature shows he now has an '05. I was thinking of one of his earlier XKRs - I recall he used to have one with the 4.0L because he put the blue top solenoids in the 722.6.

So if Billy Clyde now has the ZF 6HP26, known issues include incorrect fluid level (it is set at 40°C), fluid contamination of the electrical connector due to leaking seals on the connector sleeve, and hardened/cracked Mechatronic bridge seal and tubular seals. As these transmissions age, we're also hearing about problems with solenoids. Early Jaguar 6HPs also had trouble with torque converters. There should be DTCs stored and the Powertrain ones can be read by a generic scan tool. Network codes require a more advanced scan tool to read.

I have bought new "genuine" conductor plates from importpartsdirect.com and from our local Mercedes-Benz dealership (I get a modest discount). M-B now offers remanufactured conductor plates. I show supersession from part numbers 140-270-08-61 to 140-270-11-61 to 140-270-12-61. I don't know if there is an even newer part number.

Rock Auto carries aftermarket conductor plates but the savings are not so significant that it makes sense to go aftermarket if genuine parts are available.

I have also repaired a couple of conductor plates with the cheap speed sensors available on eBay, and neither vehicle has come back with transmission problems. It's been a couple of years since I bought a new conductor plate, so I don't know the current state of availability.

P.S. Pelican Parts is good, but I find that FCP Euro typically has better prices on parts for Jags, M-Bs, BMWs, Audis, Porsches, Volvos, etc., and they're good about identifying parts that are essentially the same as the automaker-branded part but sold by the OEM at a lower price. They also offer a lifetime warranty on parts purchased from them, and on the two occasions when I have had parts fail, they have honored the warranty - I just had to pay the cost of return shipping on the defective parts.

Cheers,

Don

 

+1 for FCP Euro regarding quality, accuracy, and price for the various parts I have purchased from them since discovering them in 2014....

 

Don B & Z Ray,
Hey guys, I've had 4 XK Coupes....1998 XK8, 2000 XKR, 2003 XKR and the current 2005 XKR Coupe...I wish I still had the 2003 Coupe because I never had any problems with it......That is until the Little Ole Lady crossed 3 Lanes of Traffic to Total it! I replaced it with the current 2005 XKR, which has created way too many problems over all these years, It went into the Shop again Today....It stopped running on the Freeway....Seems like it just wants to be in the Garage with someone working on it! I am really tired of this problem Child!

Billy Clyde @ Cinco Ranch

 

so sorry. You deserve better, even if you are a Texan.

Okie Z

 

Sorry to hear, Billy Clyde! Please let us know what the shop finds. This is how we all learn!

Cheers,

Don

 

Don & "The Okie",

Thanks for your thoughts, Guys! The problem is that I bought this Coupe "Used" @ 47,000 miles....It had been treated very Badly....example: The Oil had not been changed but one time and that was at around 5,000 miles! I had to rebuild the Engine @ 55,000 miles! It has consistently been a problem ever since! You name it and it has been there and done that!
I don't know yet what the problem is this time but if it is too big....It's HISTORY! .

Billy Clyde @ Cinco Ranch

 

OUCH
wj

 

Hi Mikejag1,

Welcome to the Jaguar Forums! It's great to have you with us!

Many knowledgeable and respected members of these forums have spent countless hours researching correct fluids for Jaguar transmissions, and one thing we've learned is that Valvoline cannot be trusted regarding the specifications its Multi-Vehicle fluids are claimed to meet. Apparently, they are able to offer fluids at lower prices by compromizing the formulations to make them "suitable" or "just good enough" for use in a wide variety of vehicles. But a fluid "good enough" for use in so many gearboxes can't possibly be optimal for use in any of them.

For example, Valvoline claims its MaxLife Import Multi-Vehicle Transmission Fluid is suitable for use in ZF 3-speed, 4-speed, 5-speed, 6-speed, 8-speed and 9-speed transmissions. Yet ZF insists that the 3-/4-, 5-, 6-, and 8-/9-speed boxes require four different fluids that are not interchangeable or backward-compatible, and if you check the Material Data Safety Sheets for those fluids, you'll find that their chemical properties are quite different from one another.

As another example, Valvoline claims that this same fluid is suitable for use in Ford vehicles that require Mercon SP, Mercon V, Mercon LV and more recently, Mercon C (for CVTs!). Yet Ford insists that these fluids are not interchangeable and, for example, Mercon LV must never be used in a transmission that requires Mercon V, and vice-versa. And Ford states that Mercon C must never be used in a conventional, non-CVT unit! By the way, Mercon SP is chemically identical to ZF Lifeguard 6, which is VERY differrent from Lifeguard 5, yet Valvoline claims their fluid is a suitable replacement for both!

Here's a link to the product info sheet in which Valvoline makes its implausible claims:

Valvoline MaxLife Import Multi-Vehicle Transmission Fluid Product Sheet

If your M-B E420 is late enough to have the 722.6 transmission, the fluids I am aware of that are approved and correct are:

MB ATF 236.14
Fuchs Titan ATF 4134
Liqui Moly Top Tec ATF 1600
Mobil ATF 134
Motul ATF 236.14
Pentosin ATF 134
Ravenol ATF M 9-Serie
Shell ATF 134
Shell Spirax S6 ATF 134M
Valvoline ATF Pro 236.14

If your E420 has the earlier 722.3, 722.4 or 722.5 transmission, it's a simple matter to search for the appropriate Mercedes-Benz Approved Fluids sheet. M-B is unique among auto/transmission makers in its willingness to test and approve third-party fluids.

For your 2003 Jaguar VDP with the ZF 5HP24 transmission, the fluids I know to be approved and correct are:

ZF Lifeguard 5
ESSO LT 71141
Mobil LT 71141
Febi Bilstein Automatikgetriebeöl (ATF) nr. 29738
Pentosin ATF 1
Ravenol ATF 4/5 HP

Automaker-branded packaging of LT 71141:
Jaguar JLM 20238
BMW 8322 9407807
BMW 3 22 2 220 442
BMW ATF 71141
BMW LA 2634
BMW ATF-1
BMW ATF-4
Citroen Z 000169756
Mercedes Benz A 0019892203
Mercedes-Benz 236.11
Peugeot Z 000169756
Porsche 999.917.547.00
VW/Audi G 052 162 A1 / A2 / A6
VW LT 71141

Since fluid-related transmission failures may occur over tens of thousands of miles, it may be impossible to realize a fluid is causing your transmission to have incorrect internal pressures, temperatures, torque converter power transfer, slippage, anti-corrosion and anti-foaming properties, seal incompatibility, etc.

The transmission is the second-most expensive component in your vehicles. Is it really worth using a fluid that has been designed to be just "good enough" to work in dozens of dissimilar transmissions for which the manufacturers specify very different fluids? Since transmission fluid needs to be changed so infrequently, why not spend a little more and use a fluid the transmission engineers tested and approved?

Cheers,

Don

 

Don, "The Okiie" & WJ,

Well, it's a new Day! The Beautiful 2005 XKR Coupe is running again! I guess she just needed a little attention....This time one of the connections to the Fuel Pump came loose! Had to be reconnected....Can't imagine how or why it came loose as it was soldered on originally....Anyway, it's running again, so I'm much happier now! She is backkk......and I am Happy!

Billy Clyde @ Cinco Ranch

 

Awesome news, Billy Clyde!

I'm always thankful to hear that another Jaguar has been saved from the scrap heap!

Cheers,

Don