Hey all, I might have issues with my trans and it might be on its way out, but I have always been wondering this.

Is it possible to swap in the 8 speed zf from the jaguar xf into our cars? I am specifically talking about the S type R.

Will it fit?
Will it bolt up to the engine properly?
Will the tcu be plug and play?

I know its a long shot but I don't want people telling me "sure anything is possible with a lot of money"

What I do know is the earlier xf with the 5.0 sc motor had a similar 6 speed in the s type rs, and then changed to the 8 speed.

Anyone who knows anything about this, it would be great to hear.

Thanks.

 

Definitely not plug and play or even plug and pray.

The cost of custom conversion would exceed the value of the vehicle.

 

Why though, mechanically what would it take, I am really curious about this, it seems like getting the stock transmission rebuilt is already exceeding the value of the vehicle.

 

Start with a datalogger and see if the CAN messages are the same. (They won't be, the STR is not going to ask for gears 7 & 8, the torque reduction requests will be different, etc.)

You'll have a ton of issues even if so. Like the "diff" (final drive) ratios.

Probably cheaper to sell or scrap the STR and buy an XF.

You could replace the 6HP26 with a used unit or fix it for a lot less.

 

The car's electronics is looking for a very specific 6 speed box but finding something very different. The mechanical side would probably be child's play by comparison.

I wouldn't even assume that all year S-type V6/V8na/V8R 6 speeds are interchangeable.

 

I expect the V6 & V8 are not.

 

I think that it would be great, if you could do it. When I test drove a 2010 XF with the 5.0 liter engine and the 6HP28, a real sequential 6 speed and paddle shifters that actually work, I fantasized the same thing. I like the S Type's looks better and prefer buttons to a touchscreen. The 2009 with the 4.2 has the same transmission as 2010 and should bolt right on, the 5.0 model 8 speed transmission might bolt up to the 4.2 engine too. I'd check with a dealer to see how compatible a switch would be, in regards to wiring harness, computers, bell housing, and such.
They're built on the same Ford platform DEW98, so at least things could be attached. If you could mount the paddle shifters to the S Type steering column, at least you wouldn't have to swap that. You'd need to switch the consoles, probably have the drive line shortened or lengthened, not a big deal, and if you're lucky the transmissions have their own computer that would plug into the S Type harness.
One thing though, the instrument cluster displays what gear you're in when using the paddle shifters and the instrument clusters are different in shape and size. You might be able to get a stand alone display that shows what gear you are in or just shift up and down by feel and revs. The NA 5.0 liter engine has almost as much power as a supercharged 4.2, so it could handle the power, so it widens your choices, along with the fact that XK and XJ models all share the same drive trains, in searching for a wrecked donor car.
Have you tested a XF with the paddle shifters?
If you could swing it, it would be the most awesome S Type out there. Money Shmoney.

 

See now this is what I'm talking about Catmobile. I have not tested the xf with paddle shifter by the way.

So even if the 8 speed will not work, I did not know the six speed in the xf in 09 with the 4.2 had a different model 6 speed, I just would like an improvement over this slush box, if it is relatively inexpensive I am all for it. Is there even any difference between trans from an 08 s type r? and is it a plug and play with that?

Anyways, the issue with the paddle shifters and all that is what do you do with the J-Gate shifter...and swapping dash clusters will be relatively difficult considering the dash is integrated with the security system, I was condering swapping to the facelift dash cluster since mine is an 03 and the new one is more aesthetically pleasing, especially since I am spending most of my time looking at it. Odds are getting the paddle shifters will require some serious wiring and probably an xf steering wheel, I just want everything integrated and stock, and make my s type r slightly faster and yeild higher mpg, the 8 speed will do all that, but I guess I am being unrealistic.

 

Study the (workshop, tech etc) manuals and I suspect every one of those desires is not financially viable.

 

Paddle Shifters? Man, make yourself an 8 speed j gate shifter! A guy can dream. 😎
8 speeds will definitely be bad ***.

 

Somebody get Cambo in here. If anybody would know how to hack this thing it'll be him or somebody he knows

 

Hi
Its possible to add paddle shift to the S-type R, as a company in the uk racing green, use to do it but no more, I assume not cost effective now
I'm sure if your good with mapping and the jaguar software it could be done
also look here for the paddle shift https://www.jaguarforums.com/forum/s...e-shift-76903/
as for the eight speed, same again, if your good with the software it can be done, just depends how much it costs and what you prepared to pay
I see a lot of people with old original jaguar s-type and mk 2's, grafting jaguar 4.0L supercharged engines, transmission, suspension and complete wiring looms, to modernize there old retro car.
maybe in the future people with be putting complete 5.0 supercharged engine/transmission and electrics in there S-type R's, to bring them up to date
cheers
Joe

 

Money - lack of - seems the problem. No-one is prepared to spend big. So it hasn't happened and won't unless that changes.

 

That's cool to see that someone was able to put in the newer transmission and working paddle shifters, or buttons anyhow. Adding functional paddle shifters would be a lot of money and work. Getting a newer transmission wouldn't be that hard if it has its own computer that would plug into the connectors for the trans computer on the S Type. Either way, if you buy a used transmission it has to be one from a R model, the internals are different for the different engines. If you wanted a newer transmission, you could just drive it in auto mode without the paddle shifters. Definitely test drive a XF to see if it's worthwhile for you. I looked and the gas mileage is about the same. The only way to get better gas mileage is to keep your foot out of it. Good luck with that. Putting a whole 5.0 drivetrain in a S Type would be cool. It's probably the last V8 that Jaguar will build.

 

[QUOTE]maybe in the future people with be putting complete 5.0 supercharged engine/transmission and electrics in there S-type R's, to bring them up to date[end QUOTE]

its already happening, but with LS's . not all in R's though
i've seen three now .