Hello everyone! Just a simple question; I recently heard that the transmissions in Jags start to go bad after 100k miles. Is this true? Mine has 112,400 miles and still runs fantastic! Or is it just depending on how well or not so well the Jags are taken care of? Thanks!

 

For me the gearbox Will fail, its just a case of when, more reading from you is required on this subject as it's easier and cheaper to deal with it now than after it's gone bang.

 

The XJ8 has the ZF5HP24 gearbox which is subject to A-drum failure. This can be avoided by upgrading the pressure regulator valve (part # 1058-327-030).

Of course, it's possible that yours has already been upgraded if you bought it used.

 

Would there be a link to buy that? I can't seem to find the part anywhere. Thanks!

 

Jaguars have traditionally used some of the finest transmissions available from the major manufacturers (ZF, Mercedes, GM), and when properly maintained they tend to be nearly bullet-proof, with many examples having traveled over 250,000 miles. The A-drum on the ZF 5HP24 is one of the rare exceptions. Most shops that repair ZF transmissions and most ZF parts suppliers can get the main pressure regulator valve for you. Here's one example:

http://www.thectsc.com/catalog/hardparts-32.html

Cheers,

Don

 

My 2001 XJ8 currently has just over 98,000 miles and I am planning to drop the transmission pan, change the filter and refill what comes out with new Lifeguard 5 fluid. I did this same service to my wife's 2004 XJ8 (x350) about a month ago and her car shifts noticeably smoother.

The previous owner of the 2001 was elderly and had all servicing done at a Jaguar dealer, supposedly. The car drives very smoothy and I could not ask for better shifts. It does not seem to "kick down" when I accelerate at highway speeds but other than that I have no complaints about the drive quality. The fluid/filter change is for my peace of mind.

The Question: Should I go ahead and replace the main pressure valve with part number 1058 327 030 01 while I am changing the filter/fluid? I already put it in my cart at the California Transmission Supply Company, only $25!

If the answer is yes, this is a good preventative maintenance idea, how difficult is the installation and is there a link to a good DIY for this job.

Thanks

 

Money is a little tight right now; I can definitely get the part but if it's too expensive to be replaced by a shop, then I may need to wait. Unless there's a simple DIY version. Then I might be able to.