Hello All,

Unfortunately, methinks my 03 STR needs the torque convertor replaced (see my other posts). I am still working on a few other checks to verify this fact with the shop where its currently at, however, I just spent the last four hours on this site plus the UK site and it appears the TC definitely needs to be replaced based on several posts by a few forum members who exhibited the same issue. The tranny was re-flashed with the latest software earlier this year, and it didn't fix anything. I am tempted to do the usual pan, flush, and refill, but I am thinking this won't accomplish anything but should be done in sequence with the TC replacement.

First, is there any money I can get out of Jaguar or ZF? I think its BS that this appears to be a common problem. I will call our local Jag dealer in Scottsdale and see if there is anything that needs to be done (LOL, probably not).

Second, my shop did the usual shop thing and did a quick estimate on replacing the TC new, $2500, LOL. So obviously I am not going to pay that. Per the TSB 307 in reference to code P0741 (I am getting this code), the new TC part number is C2C 6704. When I do a google search on this, only jagbits comes up but doesnt have a price (I will call them) and several other russian websites. On top of that, I do see several reman 6hp26 torque convertors that say, "Jaguar" "BMW" "Rover" on the heading but dont have any more specific information. So this is what I have but am curious if there are any other options:

Jaguar CONVERTER-TORQUE - C2C6704

Random google find: Jaguar Torque Converter S-type

CTSC also has them but only for BMW's (sent them an e-mail): Torque Converter: The CTSC - ZF Parts

The ebay option, I might call these guys tomorrow: ZF6HP19 ZF6HP26 Torque Converter BMW Audi Jaguar Ford 6HP19 6HP26 | eBay

Anyone have any other ideas before I start speaking with the transmission shop in person? I want to be prepared with options once I speak to them in person. Thanks!

 

This is not a common torque converter, thus, I doubt you'll find any rebuilt units. For BMW, there are plenty of rebuilt torque converters that have an upgraded seal to keep the torque converter from "hunting".


Yes, it is a shame that premium cars are junk. You can drive an old 70s Chevrolet and never have problems with the torque converter or differential. Try that on today's premium vehicle.


This is why I no longer sell used Jaguars. Never-ending repairs.

 

The torque converter for the 4.2L S/C cars is different to the N/A cars, don't ask me why, I've been trying to find out myself for a while now. I can only assume there is an internal difference because of the higher power/torque output from the S/C engines.

In theory, anyone who's able to rebuild a ZF torque converter should be able to do it, the trick is do you take yours out & send it off? or try to find one from a donor car & get that one rebuilt?

The 2nd option would be my choice, for several reasons, but they are very hard to find....

The part C2C6704 has been superceded, the latest version is C2C28435 from what I can tell.

Keep an eye out for converters from the 4.2L S/C X350, XKR (X103 & X150) & the XF's, they are all the same, apparently...

 

Yikes, for the cost of a new torque converter you could get a whole transmission:
Transmission Automatic 2004 Jaguar XJR with 14 267 Miles | eBay

I really have to wonder if the Jaguar part interchanges with another make that uses the 6HP26 or even a Ford 6R80. Ford would be ideal since there are lots of options for the Mustangs and they certainly can take the power.

 

I got this data from the ZF pdf parts catalog listed below, data is only for SC'd cars:

http://www.zf.com/na/content/media/e...atalog_pdf.pdf

Prod Dates | OEM Reman # | Trans ID | TransID w/Mech Body | Mech Valve Body | Torque Convertor | TC Code
02/02 - 06/02 | 2R837000LE | 1068 010 031 | 1068 012 068 | 1068 198 948 | 4168 028 635 | B84
07/02 - 01/03 | 2R837000LF | 1068 010 044 | 1068 012 083 | 1068 198 948 | 4168 028 635 | B84
04/03 - 04/03 | 2R837000LG1 | 1068 010 076 | 1068 012 179 | 1068 012 948 | 4168 028 635 | B84
06/03 - 10/03 | 2R837000LH | 1068 010 076 | 1068 012 141 | 1068 012 948 | 4168 028 635 | B84
06/05 - 10/05 | 6R837000CC | 1068 010 164 | 1068 012 379 | 1068 012 948 | 4168 028 635 | B84
10/05 - Current | 6R837000CD | 1068 010 164 | 1068 012 387 | 1068 012 948 | 4168 028 635 | B84

 

So one part number only across the whole year range? Okay.....

ZF probably has a different way of running their part numbers than JLR.

It's crazy with JLR sometimes, you have an identical part, identical dimensions, identical functions, and it gets a new part number because of ?

If you see the ZF Lemförder suspension parts listed for Jags, they have 1 part number, and JLR has 4, 5, 6 different ones...

Which reminds me, you should also look out for Range Rover 4.2L S/C unit as a donor

 

At 10 yrs old I can't imagine you could argue it's any kind of warranty claim, especially as there seem to be cars without the problem. High performance cars as this was when made do commonly have issues by 10 yrs old if not much sooner. The way to avoid them is simply to stick to high volume rather ordinary cars.

The SC's 6HP26 weighs quite a bit more than the NA's so something is substantially different. There must be used ones around.

 

Thanks to Cambo giving me the new part number, C2C28435, I was able to find a few online dealers that sell this TC brand new; price ranges are $1440 to $2000 (ouch). Upon doing more research, I found two more places that actually noted within their website that they re-man these TC's for Jags. This issue with remanufacturing this would obviously be logistics, where the transmission shop would have to pull out the TC, ship it out, and then wait for it to come back. I bet most will not be too keen on that idea where customer turnover equals $$'s.

Torque Converters used in ZF6HP26 Transmissions - Precision of New Hampton
Item # 7271 - Lady said it would be $262 plus freight excluding depost. I had her lookup the sales history, and she said they have done 13 this year, specifcally for this part number. Turn around is 1-2 business days.

TRANS SPECIALTIES : JAGUAR ZF 6HP26 TORQUE CONVERTER Remanufactured and rebuilt automatic transmissions, transmission parts and torque converters
Item #: TS-JZF26RR - Gentleman whom I spoke to was an actual technician, and cross referenced my car with item # I found. Said they install a new piston, carbon composit clutches and some kind of refinished fins; he also mentioned he orders parts directly from ZF. $495.00 exluding deposit and freight, turn around is 2-3 business days.

Also called up a random eBay company and they said they could re-man it, but I didn't get a warm and fuzzy.

The shop hasn't called me with any updates as of yet, so more info to come...

 

I like the $495 one. Sounds like they know what they are doing.

Any chance you could pull the tranny and send the TC in? I see you have a hot rodded Camaro so you do your own work?
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I am watching this thread closely.

 

yup. me too. I'm hoping it's covered under the extended warranty I got from the dealer I bought the car from last year.

 

It's in the power train so most warranties should cover that.
But post back with your results.
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Since I'm int he same area, I'm also interested in what shop you end up going with to do the work and how the experience is.

I intend to keep the car a long while, so I expect that sooner or later I too will need someone who knows their way around a 6HP26.

 

If $495 works out it's a bargain!

 

Good call sir; I pulled the engine on the Camaro twice (not fun as it should come out from the bottom not the top) so I could most definitely pull the tranny and do the work myself, but my biggest complaint with the Jag is being able to jack it up safely to a height I feel comfortable with. Even with my low profile jack from Harbor Freight, I always feel like its in an awkward position do to the jack points being toward the inner part of the car. So at this point I enjoy doing the minor maintenance on the car, but will leave the really big jobs such as this to the professionals who hopefully "know" what they are doing, have a lift, and have the proper tools to complete it correctly. I'm also going to request they change the pan/filter, sleave, and fill it up from Lifeguard 6 from thectsc.com on top of doing a TCM reflash.

More results to come...

 

The shop is now telling me that since the torque convertor is failing, they believe there is now debry all throughout the tranmission. Due to this unverified fact, they are recommending a new transmission at an expected astronomical price. I have requested they pull the plan and verify this, but my question to all is if this a normal result of torque convertor failure, to have the clutch lining break apart and destroy the transmission? Seems slightly plausible at first thought, but would like to hear if anyone has experience in this or if it is fear mongering.

Thank you

Edit, car has 65K miles and drove it for 30+ miles on the P0741 code only.

 

Well that has NOT been reported before. But if you keep driving forever the chewed up lining has to go somewhere?

So I would open the drain plug and sneak a small sample of fluid. The shop could be right but I think they don't want to put a converter in an old car and then be held liable if the rest of the transmission has problems or gives out.
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isn't that the job of the filter to catch any debris?

 

The issue with the torque converter is that the seal fails and that makes holding direct engagement impossible as the trans warms up. Same problem with BMWs. The issue is not debris, it is a crap seal that is there from the factory.


The rebuilt torque converters have an updated seal design and that alone will give you trouble-free operation of the torque converter. Too bad ZF can't get it right the first time. Even a cheap car like a Dodge Stratus has a better torque converter.

 

That was my understanding too, it's not that the torque converter disintegrates or falls apart, it's that it no longer holds pressure through the seal. No pressure = no drive.

Doubt very much that the trans could be affected by this in any major way.