W124 4-speed auto - lock-up in top?

S80

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Hi,

Can someone please tell me if the 4-speed auto box fitted to the W124 has torque converter 'lock-up' in 4th?

In my 280E, when cruising around 70mph, even the slightest added pressure on the accelerator will see the revs rising without any increase in road speed.

A previous Jaguar XJ40 did have 'lock-up' which would see revs 'match' road speed increases under gentle acceleration - just as if it had a manual g/box.
 
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S80

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Thanks Malcolm - I'll keep a more watchful check on exactly how the revs behave relative to road speed and accelerator position.

Should it be possible to tell when lock-up takes place?
 

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Thanks Malcolm - I'll keep a more watchful check on exactly how the revs behave relative to road speed and accelerator position.

Should it be possible to tell when lock-up takes place?

It is only momentary, then releases again, this stops the jolt that some cars are prone to when going into top
 

turbopete

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It is only momentary, then releases again, this stops the jolt that some cars are prone to when going into top

but ruins fuel economy, id imagine?
 


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