XK8 5th Gear "Slip"?
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Junior Member
Joined: Jan 2018
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XK8 5th Gear "Slip"?
Hi,
I'm having a long term problem with my XK8 trans.
When driving/cruising at say around 50-60mph, in 5th gear - if I accelerate lightly (not enough to downshift), the engine revs will climb 200-300 rpm before I get any "pull" from the trans - then it will "bite" and the revs will drop back down and car will drive as expected.
If it was a manual stick shift it feels like the clutch is slipping or the clutch is depressed then released.
Only seems to to happen in 5th at around 1800-2000 rpm.
I recently had the common cracked valve body replaced by a specialist which sorted the clunk into R&D, but the "slipping" issue was present before this, and hasn't changed since?
I'm aware of various problems with these boxes, but haven't read of anyone else with this issue.
Any help much appreciated!
TIA
I'm having a long term problem with my XK8 trans.
When driving/cruising at say around 50-60mph, in 5th gear - if I accelerate lightly (not enough to downshift), the engine revs will climb 200-300 rpm before I get any "pull" from the trans - then it will "bite" and the revs will drop back down and car will drive as expected.
If it was a manual stick shift it feels like the clutch is slipping or the clutch is depressed then released.
Only seems to to happen in 5th at around 1800-2000 rpm.
I recently had the common cracked valve body replaced by a specialist which sorted the clunk into R&D, but the "slipping" issue was present before this, and hasn't changed since?
I'm aware of various problems with these boxes, but haven't read of anyone else with this issue.
Any help much appreciated!
TIA
Veteran Member
Joined: Nov 2013
Posts: 3,397
Likes: 1,633
From: Regional NSW, Australia
Hello there . . . I was just ready to add my . . . +1 to what Chris said, then add . . . "Guessing at your car is not just an issue of time-wasting. Any advice given against an incorrect guess could be downright dangerous" . . .
However, in looking at your profile, I note you are in GB and appear to have attempted to add the necessary to your sig. News is that it has not worked so perhaps you need help to do so. If so, go to main menu, User CP, Edit Sig, then type in details (year, model, engine, g/box etc). Remember to Save. Exit, go to your post, refresh and check.
OK? So, for a '98 XK8, I am guessin a 4.0L V8, NA, with a ZF 5HP24 trans?
But there I go guessing. Let's get your sig sorted, eh?
Cheers,
Ken
However, in looking at your profile, I note you are in GB and appear to have attempted to add the necessary to your sig. News is that it has not worked so perhaps you need help to do so. If so, go to main menu, User CP, Edit Sig, then type in details (year, model, engine, g/box etc). Remember to Save. Exit, go to your post, refresh and check.
OK? So, for a '98 XK8, I am guessin a 4.0L V8, NA, with a ZF 5HP24 trans?
But there I go guessing. Let's get your sig sorted, eh?
Cheers,
Ken
Thread Starter
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Junior Member
Joined: Jan 2018
Posts: 22
Likes: 9
As far as I was aware a hard reset does not erase the transmission module adaptive learning?
Will give it a go anyway and let you know!
Thanks
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