Transmission question. Driving after cold start...
#1
Transmission question. Clunky shifts after cold start?
Does anyone else's XK or XKR trans operate clunky after a cold start? Like after 8 hours+ of sitting. Ever since I bought my car a year ago, the first mile of driving (especially slower speeds while I leave my neighborhood) the transmission shifts poorly and clunky.
My car is CPO so I had Jaguar take a look and there was regional ZF rep there too, and they found no issues, apart from the fluid being a little bit low. They topped it off, but the issue persists.
It happens for about the first mile of driving. And then the car shifts great once it warms up, I suppose?
My car is CPO so I had Jaguar take a look and there was regional ZF rep there too, and they found no issues, apart from the fluid being a little bit low. They topped it off, but the issue persists.
It happens for about the first mile of driving. And then the car shifts great once it warms up, I suppose?
#2
#3
Nope, never do. Like I said, leaving my neighborhood I'm doing slow speeds for about .5 mile. And then I get on a highway and accelerate fairly gingerly (shifts around 2500) and the shifts are just...clunky. But once that first 1-1.5 mile or so is driven, it smooths out.
I'm thinking of keeping the car long term once the CPO expires in 2018, and I had an Audi A6 4.2 with the same ZF6 trans that started to fail after 70K miles. So if there's a known potential issue, I'd love to get it fixed by the CPO.
I'm thinking of keeping the car long term once the CPO expires in 2018, and I had an Audi A6 4.2 with the same ZF6 trans that started to fail after 70K miles. So if there's a known potential issue, I'd love to get it fixed by the CPO.
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#7
I don't think that disconnecting the battery will clear the transmission module adaptations, only the powertrain adaptations, so you may have to use a diagnostic tool to do it.
My 07 XKR had a really harsh change from first to second for the first few minutes when started from cold when I first got it. I cleared the adaptations using SDD and it has been fine since.
My 07 XKR had a really harsh change from first to second for the first few minutes when started from cold when I first got it. I cleared the adaptations using SDD and it has been fine since.
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ArnoldKay (02-26-2017)
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#8
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ArnoldKay (02-26-2017)
#10
I don't think that disconnecting the battery will clear the transmission module adaptations, only the powertrain adaptations, so you may have to use a diagnostic tool to do it.
My 07 XKR had a really harsh change from first to second for the first few minutes when started from cold when I first got it. I cleared the adaptations using SDD and it has been fine since.
My 07 XKR had a really harsh change from first to second for the first few minutes when started from cold when I first got it. I cleared the adaptations using SDD and it has been fine since.
My 2012 XF 5.0 when I had it in NYC and FL never exhibited that behavior. It could be that line pressure settings are quite different for both transmissions, though. I personally think it's the valvebody that's the culprit and may be designed this way. But I am curious to see how the SDD clearing will work.
#11
The only time my XK would ever shift "clunky", was when going from sport for engine braking, say to cross rail road tracks, then back to regular once on the other side.
After changing the transmission fluid and filter @ 60K Miles, this particular situation became a lot less noticeable.
I do not really notice a difference hot vs cold start before or after the fluid change.
After changing the transmission fluid and filter @ 60K Miles, this particular situation became a lot less noticeable.
I do not really notice a difference hot vs cold start before or after the fluid change.
#12
Join Date: Apr 2008
Location: Ottawa, Ontario, Canada
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The only time my XK would ever shift "clunky", was when going from sport for engine braking, say to cross rail road tracks, then back to regular once on the other side.
After changing the transmission fluid and filter @ 60K Miles, this particular situation became a lot less noticeable.
I do not really notice a difference hot vs cold start before or after the fluid change.
After changing the transmission fluid and filter @ 60K Miles, this particular situation became a lot less noticeable.
I do not really notice a difference hot vs cold start before or after the fluid change.
Cheers All.