Piston Slap: Are You Jagsperienced?

Sajeev Mehta
by Sajeev Mehta
piston slap are you jagsperienced

Allen writes:


Hopefully you can offer some light at the end of the tunnel for an issue that a friend has with her 2004 Jag X-type. The car is in great shape for its age and all was well until the bad news came regarding the transfer case. The car recently started acting up and the local Jag dealer diagnosed a failed transfer case with a part price of 3,600 with 6+ hours of labor.

I’m not Jagsperienced so I have to take their quote at face value.

Do you know of any resources on a failure of this type? The failure occurred virtually overnight and with the value of the car, it seemingly is a death sentence for what is an otherwise healthy car.

Any wisdom you can offer would be greatly appreciated.

Sajeev answers:

Explain more about this “acting up” before the car needed to go to the dealer.

Allen writes:

Literally overnight: rough, jerky acceleration closely followed by garbage can full of pistons sound and lack of drive. I had changed the plugs the week before. During the test drive after the plugs, I only heard a couple of rough clashes that I wasn’t even sure were from that car because they didn’t repeat and I was in traffic at the time.

Sajeev answers:

Ah-ha! This problem?

I reckon this happened because of a lack of fluid changes in the transfer case. Ask her if she followed the service specifications outlined in the owner’s manual. Even if she did, supposedly Jaguar/Ford doesn’t make it very easy: perhaps no mechanic ever touched the transfer case? Let’s hope not.

You can get a used X type transfer case, finding one might be easy depending on if her Jag has traction control. But considering the inherent weakness found in a lack of fluid servicing, will you get another pile of crap from the junkyard? Remember this: it’s not your car, not your problem.

Tell her to sell it, or roll the dice with an independent mechanic installing a junkyard replacement (and fluid change). The former is a better idea, especially if she’s better off (financially) in a cost-effective vehicle.*

*That’s not a sexist thing, there are plenty of cash-strapped dudes in ticking time bomb, maintenance deferred premium vehicles when they should be in a used Corolla. Your job as a Piston Slap reader is to give people a reality check if or when they need it.

[Image: Shutterstock user Timofeev Vladimir]

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry…but be realistic, and use your make/model specific forums instead of TTAC for more timely advice.

Join the conversation
3 of 73 comments
  • Danio3834 Danio3834 on Apr 28, 2015

    Take this failure as a sign that it's time to put this cat down. This will be just one in a long line of expensive repairs to come. These weren't good cars for the faint of heart.

  • Superdessucke Superdessucke on Apr 28, 2015

    A 2004 Jaguar needing a $3,600 part AND 6 hours of labor? A red gas can, a gallon of regular unleaded and a cigarette letter from the Circle K would be a much more cost effective solution.

  • MaintenanceCosts This is now our fourth 20th Anniversary GTI, and the third of those four that had major structural modifications for purely aesthetic reasons. I didn't picture Tim as the type to want to join the STANCE YO crowd, but here we are?
  • JMII This is why I don't watch NASCAR, it just a crash fest. Normally due the nature of open-wheel cars you don't see such risky behavior during Indy car events. You can't trade paint and bump draft with an Indy car. I thought it was a sad ending for a 500. While everyone wants a green flag finish at some point (3 laps? 5 laps?) red flagging it is just tempting people too much like a reset button in a game.The overall problem is the 500 is not a "normal" race. Many one-off competitors enter it and for almost every driver they are willing to throw away the entire season championship just to win the "500". It sure pays way more then winning the championship. This would be like making a regular season NFL game worth more then the Super Bowl. This encourages risky behavior.I am not sure what the fix is, but Indy's restart procedures have been a mess for years. If I was in charge the rule would be pit speed limiter until the green flag drops at a certain place on the track - like NASCARs restart "zone". Currently the leader can pace the field however they wish and accelerate whenever they choose. This leads to multiple false and jumped starts with no penalty for the behavior. Officals rarely wave off such restarts, but that did happened once on Sunday so they tried to make driver behave. The situation almost didn't happen as there were two strategies in the end with some conserving fuel and running old tires, driving slower with others racing ahead. However the last caution put everyone on even terms so nobody had advantage. It always gets crazy in the last few laps but bunching up the field with a yellow or red flag is just asking for trouble.
  • Tim Healey Lol it's simply that VWVortex is fertile ground for interesting used cars!
  • Jalop1991 I say, install gun racks.Let the games begin!
  • EBFlex For those keeping track, Ford is up to 24 recalls this year and is still leading the industry. But hey, they just build some Super Dutys that are error free. Ford even sent out a self congratulatory press release saying they built Super Duty’s with zero defects. What an accomplishment!