Hey mate
Not quite sure what you mean. Did you mean noise in terms of the D1 (linkage) being noisier than the D2 (cable) system?
If so, with all the other noise of a constant 4WD drivetrain going on, I don't think you'll notice.
In terms of general noise, I get a little more now, as when I fitted the Ashcroft I was too cheap/lazy to make up a new foam gate shroud for the shifter as you (obviously) need to cut it to allow shifting across the gate when locking. However this is really minimal in the great scheme of things.
If you take care of this I really don't think you will find any difference at all between a CDL/non-CDL vehicle. 
Cheers
Mike
'00 D2 Td5 'Alice'
'03 V6 Freelander 'Phoebe'
'04 Td4 Freelander 'Harry'
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