XK8 / XKR ( X100 ) 1996 - 2006

Transmission clunks, no codes

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Old May 11, 2010 | 09:46 AM
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Got a Jaguar Jones's Avatar
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From: Simi Valley, CA
Default Transmission clunks, no codes

Hi, I'm a Newbie to the forum, but not to Jags. My N/A '99 XK8 w/104K miles has a trans. problem.
When warm (20-30 minutes driving), I'll come to a stop, and as I'm taking off, I'll give it a little gas and there is a slight hesitation, then it slams into gear with a severe clunk. I feel this is what destroys the A drum, according to other threads on this and other forums. It seems that it doesn't apply the forward clutch at the stop until it's given some throttle. I have checked the fluid at proper temp, and it's full.
Now, my question is whether this is a problem with the hard parts or possibly a solenoid problem. This does not happen at every stop, though it is getting more frequent. Trans shifts perfectly any other time. I have owned this car for about a year, no history before that.
My XJ8 has the same trans, but rebuilt by the PO, and the XK8 feels comparable, with the exception of the clunk. Any insight would be appreciated.

Thanks,
Larry
 
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Old May 11, 2010 | 05:48 PM
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Dan R's Avatar
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Mine does the same occasionally.

I will be interested to know what is causing it.
The ATF fluid is fresh and at the correct level.
 
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Old May 12, 2010 | 10:03 AM
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It sounds like 'the lurch', its a common symptom of the earlier ZF transmissions, some worse than others, and also theoretically can be corrected (or reduced) by TCM programming upgrades. You could also try a hard reset of the car's computers (TCM included) by removing the negative cable from the battery and briefly touching the positive terminal. The TCM will have to relearn your driving styles and may help your situation. Mine does it from time to time. I learn to avoid the California stop signs (roll then slightly gas it) and I've almost eliminated my occurrences.

Read up on your 'version' here.
 
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Old May 13, 2010 | 01:52 PM
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Got a Jaguar Jones's Avatar
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Although this seems to apply to the 6HP26 trans., my symptom resembles "version" 2.
I will try a hard reset over the weekend and see if any change.

Thanks for your response.
 
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Old May 14, 2010 | 08:40 AM
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Default Mine was doing this...

exact same thing. I had a leak coming from one of the tubes coming out of the tranny. They fixed the tube, filled the fluid and the problem went away.
 
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