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Jaguar XK8: I have a 1998 xk8 with 90K miles which runs perfectly…

I have a 1998 xk8...
I have a 1998 xk8 with 90K miles which runs perfectly for 45 minutes or so and then the transmission doesn't shift properly. Problems are that Gear changes at too high RPM and won't go into 5th gear. Seems that once the car runs awhile and heat increases transmission problem begins.
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Answered in 16 minutes by:
8/1/2013
Jaguar Mechanic: Richard, Jaguar Technician replied 9 years ago
Richard
Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 16,762
Experience: 12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.
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Hello and welcome to justanswer.com

Does the gearbox fault warning come on? Do you notice a problem if you drive in sport mode? Do you have any issues when accelerating from a stop?
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Customer reply replied 9 years ago

The gearbox fault warning does not come on and there is no problems accelerating from a stop.

forgot to mention, Sport Mode has same problem, no better or worse than normal mode.

Customer reply replied 9 years ago
Relist: Other.
No answer yet, just a question. Responded with info requested but only silence.
Jaguar Mechanic: Richard, Jaguar Technician replied 9 years ago
Sorry for the delay.

Does the transmission slip at all or just will not upshift.
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Customer reply replied 9 years ago
No slippage.
Jaguar Mechanic: Richard, Jaguar Technician replied 9 years ago
Ok it sounds like we may have an issue with one of the shift solenoids or regulators causing this when they get hot. It can also be a mechanical failure. We first should check the fluid level and condition. Since there is no fluid dipstick this is not easily done. There is a fluid level fill plug that is removed on the rear side of the case and fluid filled/checked through that plug. This must be done on a level surface or lift and with the fluid warmed up from 30-50 degrees C.
Richard
Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 16,762
Experience: 12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.
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Richard
Richard
Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 16,762
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Experience: 12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.

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