My 2000 Jag Stype, 4.0 Liter, Auto Trans, is giving me a Gearbox Fault Code. Appears the Transmission Solenoid Pack (In the Transmission Pan) needs to be replaced.

Does anyone know where I can find one at a good price ? Do not want to buy used, but new. Anywhere in North America where it is available will work.

Thanks in advance.

 

I don't work much on S Types, so I don't know for sure...but doesn't a 2000 4.0 use a ZF5HP24? If so, that's an unusual failure you are chasing. I'd be inclined to remove and clean the harness connector at the LR of the trans case. If it's a Ford trans, sorry I do not speak he language.

 

Surprisingly enough I had a solenoid malfunction in my ZF 6HP26.. Once the solenoids go, the transmission start self destructing. I'm having mine replaced and the bill is right around $7k. If I didn't have a warranty I would be quite angry right now. ZFs are incredibly complicated transmissions so trying to replace a solenoid is a pretty adventurous move and I've heard it damn near impossible to do successfully, but I hope it works out. Do it as soon as you can though, it's only going to get worse. Eric

 

Thanks for that Whitey, I had not read that before and that's the later XJ/XK trans as well.

 

The Transmission I believe on a Jaguar 2000 Stype is the 5R55N model, which is made by Ford, not the other type mentioned in the threads above.

 

Thanks, I was wondering. Sorry to have hijacked your thread. If you're looking for best price, might is be worthwhile to source your items through Ford?

 

whiteSTR,

Do you have knowledge (or just an opinion) of why the solenoid in your ZF transmission failed? Clues to watch out for may help all of us with these complicated and expensive ZF contraptions....

Also, I assume your ZF is running Shell M1375.4 mineral oil as its transmission fluid. Correct?

 

Well the best consensus of opinion that we could come up with is my driving style.. My car is permanently in sport mode and almost always in the manual shift mode. I downshift into turns, bounce it off the rev limiter, and autocross my car a lot. I also modified a couple of things that may have sped up the breaking process. I drive my cars hard and I guess the ZFs just aren't built for that kind of abuse. If I could have thrown a tremec in there I would have, but I may just be driving the wrong kind of car..

The fluid is whatever Jaguar sells.

Lol I know this doesn't really answer the question, but that's all I know. Eric

 

Does the 4.0 from 2000 use the (Ford) 5R55N? The 3.0 does, but I'm wondering whether the 4.0 uses the (ZF) 5HP24. (The XK8 used this combination.)

An auto specialist should be able to find out easily enough.

jtis may or may not help.

 

"breaking process" lol

Jon, this caught my attention too as I had not read of six speed ZF failure patterns. It would be beneficial to find out if this is just a rare case where destructive testing got the job done. I don't think it's common, but would like to learn more.

 

Well, whiteSTR has never been shy about admitting that he drives the pure hell out of his car, probably well past what some might label as "abuse". I suspect that is indeed the primary cause of why he is in the process of having his transmission replaced now....

I also would like to learn more about these failures. While I respect the quality and integrity of the ZF, its extreme replacement cost scares the living daylights out of me....

 

First I had a torque converter clutch solenoid go on mine, which caused other far more severe problems. I just though it was the good ol' "lurch" when I started having problems and didn't think anything of it, but then I started getting gearbox faults and CELs.. Then we took a fluid sample and the tranny fluid was blacker than mud. So we figured the clutches and gear are most likely shot as is the TC. So there was really no other option other than an entire new transmission. If it was a turbo hydramatic or a torqueflite it would be spread out across my work bench, but a German ZF is a little bit out of realm.. Eric

 

AP Here. I did verify that the stype 2000 v8 uses the 5R55N transmission not the ZF. The ZF came in 2003 and later years.
Appears that many people have had the pre-stroke 4-3 spring bring that causes this non-shifting into 4 or 5th gear and the Gearbox Fault. Definitely bad engineering.
My first path to correct will be to replace the pre-stroke 4-3 spring and see if that corrects the situation. Secondary course of action is the Solenoid pack, but that costs quite a bit, so don't want to try that unless the first path does not work.

Apparantly Ford wants like $1200 for the Solenoid pack, but aftermarket its in the $280-$350 USD range.

Will find out in a few days and report back.

 

What did you find out? I am in the same fix. Any info. would be most helpful. Thanks.

 

Make sure your problem matches the same error codes? This spring is for codes P0734, P0735. Have you lost 4th and/or 5th gear? Here is a page from Sonnax who makes the aftermarket spring.

http://www.sonnax.com/tech-articles/TB-VOL1-NO7.pdf

The Ford solenoid pack is part number:
4L2Z-7G391-AA BODY ASSY-TRANS SOL

Now be sure and verify this number!! Ford used this transmission (5R55N) starting in 2000 on the Lincoln LS but put in a slightly different mode (5R55S)l starting in 2003.
.
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.

 

It's definitely the 5R55N. That is also the same trans. on my wife's 2001 S-type 4.0.