Hi all,

New Jaguar owner and new forum member here. Bought a 2005 S-Type 3.0 last weekend with ~46k miles on it. Very clean inside and out and thought it was a great find.

Just this morning I noticed some weird problems and hope that some of the more experienced members here can help me out.

- Shifting into OD seems to happen prematurely and the car makes a sound almost like a groan. When I open up the throttle a bit and force a downshift, everything seems fine.
- Under normal coasting or very slight acceleration around 55 mph the odometer wavers. Not so much that I feel the car lurching, but enough that I notice the the needle moving around and not staying steady.
- I've begun to notice that downshifting from 2nd to 1st is becoming a bit unsmooth.
- No CE light.

My first thought was that I should change the transmission oil, but after reading some posts on here that doesn't seem too good of an idea. Anyone have any input?

 

It's a very good idea to change the gearbox oil, 60k miles is the recommended interval I belive.

Check if you have any codes or pending codes, if your engine isn't in perfect running condition it can cause gearbox issues.

 

I presume you mean tachometer.

This condition is very common:

"S307-14: This Technical Bulletin has been issued to address a customer concern of a surge in
excess of 150rpm during engine warm up, at a temperature of 30°C to 50°C and at a vehicle speed
in the region of 40mph (64.3kph) to 60mph (96.5kph).

Action
Should a customer express a concern, the Transmission Control Module (TCM) should be reconfigured
using the Worldwide Diagnostic System (WDS) with software release JTP 759/27 or later."

As police stated, changing the fluid wouldn't hurt either.

 

Thank you both.

Yes, I did mean tach - thank you. If it is the TCM software, a dealer should complete the service for free, right?

 

You wish! A dealer will charge you plenty, but if you can find a local independent, much better.

 

Might have been free when new but now - no chance. Not very expensive to reflash, normally.

 

To get a better understanding take a look at the "Lurch".
Any internet search with Jaguar and Lurch will bring you right to it.

Yes get the transmission serviced BUT read up on it first. We have many threads with where to buy the stuff and what stuff to buy. You need knowledge as the S Type is not real common and even the dealers get it wrong sometimes!
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Did this ever get resolved?

 

Just adding to this old thread to say that my 2005 VDP started having extremely hard upshifts. I had an indepentent Jag shop reprogram the tranny and now it's shifting fine. The car had 78k on the clock at the time this started.