So I'm lazy, and the answer I'm looking for is probably on here but I don't feel like searching through dozens of pages.

Just got 2006 s-type with 6 speed auto. When the car is cold (under 30 F outside), first gear sort of slowly shifts to second. Not rough, just a half second where there is nothing. Is this a sign of the dreaded transmission lurch? (52,000 miles)

 

don't think so sounds like sticky solenoid maybe give it a service.
when you say there is nothing does the revs flair like its dis engaged from drive ?
also have a read on this website its all about the dreaded lurch

Jaguar S-Type ZF Gearbox Lurch fault

 

I read those 2 variants and I don't have any of that. Again I notice it once when the car is very cold, I just assume it is transmission fluids not being circulated yet?

 

If your car is still running its factory fill of ATF, that fluid is now pushing ten years old and its friction modifiers have long since worn out. So it's time for an ATF drain-and-fill. That may be all you need to do to restore your ZF's shifting patterns to normal....

 

It did the trick for mine

 

I feel so paranoid now. I cant enjoy driving my car when I have little issues that could turn into big issues. I feel like I am talking myself into believing I have the "dreaded transmission lurch". I guess Ill follow everyone's advice and have the fluids professionally changed. Thanks

 

No reason to feel paranoid. Our S-Types are all getting a bit long in the tooth and certain components must be checked and sometimes refreshed or replaced. ATF is at the top of that list. So start with fresh ATF and see how your car responds. That may indeed be all you need to do in order to resolve your shifting issues....

Mercon SP is a much lower-cost alternative ATF to the factory fill of Lifeguard 6. Many of us are now running it in these ZF 6HP26 transmissions (which is what you have). Available at any Ford dealership for between $7 and $8 per quart. Do a bit of research and decide if you want to go with it....

 

Here is some basic information on replacing the sump/filter and connector sleeve on the ZF 6HP26 gearbox.

When replacing the connector sleeve, it is critical that there be no static electrical discharge to any of the gearbox pins and that the sleeve maintains a 3mm gap with the housing.

Follow the procedure outlined in JTIS for filling the gearbox to the correct level at 45 - 50 C.

 

I was quoted at $650 to replace fluids. 2 hours labor, 6 liters, and a $220 pan/filter.

 

That's a relatively high quote. Check some of your local indie shops. Find one that will let you source your own parts and just charge you for their labor. You'll come out hundreds of dollars ahead....

 

I understand it is "recommended" to only use zf lifeguard 6 fluids. I'm seeing it for ~$20. Do you know of a place that sells it cheaper, or what are the best alternatives to zf fluids? (In USA)

Edit: is a BMW zf6 filter/pan going to be comparable?

 

So I now have an ever so slight knock sound when letting off the accelerator at under 15 mph.

 

Check engine mounts . Both mine were broken when I purchest my car . It also had a small knock ! And I could see the bonnet/hood getting pushed up when I floored it , not ideal