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Home > Technical (L322) > Low range help

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Philcaz

Member Since: 18 Apr 2020
Location: London
Posts: 20

Low range help

Hi guys
As title says I would appreciate some help from the wealth of knowledge on here

I’ve got a v.8 2004 petrol ffr with 118k on the clock
My symptoms are when I put the car into low range it seems like it takes a boot full to get it
Going like a clutch is slipping but in high range it’s totally fine I’ve scanned the codes and
It does say
Noise on actuator signal

Has anyone had this before I’ve done a bit of digging and some people say it could be the sensor
In the transfer case motor

Any help would be much appreciated

Phil

24th Mar 2025 6:56pm

RRPhil

Member Since: 22 Aug 2011
Location: Blackburn, Lancashire
Posts: 1000

When you perform the range change from High to Low, does the low range indicator light on the instrument panel flash while the range change is occurring, and then illuminate constantly? Also, do you get a warning chime sound and ‘LOW RANGE’ displayed in the message centre for a few seconds after the change?

Phil

25th Mar 2025 11:45pm

Philcaz

Member Since: 18 Apr 2020
Location: London
Posts: 20

Hi mate
Yeah it all seems to do exactly what you asked but in low range it gives the symptoms of a clutch slipping and is quite jerky not smooth if that makes any sense

26th Mar 2025 12:03am

PaulTyrer

Member Since: 22 Jul 2013
Location: Devizes, Wiltshire
Posts: 1261

2006 Range Rover Supercharged 4.2 SC V8 Cairns Blue

I dont know if its related, but we had a 4.4V8 L322 petrol (now a 4.2S/C )and ours was jerky going into (mostly) reverse), , not sure if there were any codes but the opinion was a possible crack or leakage in the valve block.

26th Mar 2025 9:39am

Philcaz

Member Since: 18 Apr 2020
Location: London
Posts: 20

Thanks mate for your reply we haven’t got a clue at the moment what it could be

26th Mar 2025 4:48pm

RRPhil

Member Since: 22 Aug 2011
Location: Blackburn, Lancashire
Posts: 1000

The ‘Noise on actuator signal’ error generally means that the potentiometer in the transfer box shift motor is producing an intermittent signal.

Click image to enlarge

The transfer box controller uses this signal/voltage to determine which range the box is in. However, from what you’ve said, the selection of Low Range seems to be working fine, so I don’t think that’s your issue.

PaulTyrer is quite right that there’s a weakness in the upper valve block which, if it cracks, leads to higher engine revs being required to get the vehicle to move off the line. However, you would expect the issue to be there in High Range as well as Low Range.
https://youtu.be/wUsc-sNFvJU

Clearly, in Low Range, the engine speed will be 2.7 times higher and the torque at the wheels will be 2.7 times more. I don’t wish to sound patronising, but are you sure that what you see as “symptoms of clutch slipping” isn’t just a result of the higher rate of engine speed increase, and the jerky behaviour not just a result of the much higher torques generated by a given throttle pedal movement?

One thing you could try is manually selecting 2nd or 3rd gear as your starting gear before pulling away from rest, and seeing if it still feels like a clutch is slipping. Only 1st gear is available as the starting gear in High Range, but in Low Range you can pull away in 1st, 2nd or 3rd gears.

Also. just to mention by way of reassurance, that the control system on your 5HP24 transmission is highly sensitive to any clutch slip in the transmission. It continuously monitors the input and output speeds and, if there’s the tiniest hint of clutch slip, it will immediately drop the transmission into failsafe mode.

Phil

27th Mar 2025 5:16pm

Philcaz

Member Since: 18 Apr 2020
Location: London
Posts: 20

Thanks Phil
I’ll try putting it into manual tomorrow when I get home

Cheers Phil

27th Mar 2025 11:10pm

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