AUTOBOX

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daren92

Member
Posts
51
ok box seams ok under normal driving but if you kick down it hits 4000 revs and box seams to stop accelerating revs stay up take foot off and go light on accelerator speed climes.
any ideas

p38 2.5 d 1999 dipstick on box
oil red
 
ok box seams ok under normal driving but if you kick down it hits 4000 revs and box seams to stop accelerating revs stay up take foot off and go light on accelerator speed climes.
any ideas

p38 2.5 d 1999 dipstick on box
oil red

Main forward drive clutch slipping likely.
 
Worth changing the oil with some of that Lucas transmission fix?
Ok slight change but little things can make big difference
As before but revs stay at 4000 for couple of seconds then drop about 2600 reapply throttle revs up then down it as if something is disengaging drive then limiting revs could torque converter disengage and ecu cut power
 
Ok slight change but little things can make big difference
As before but revs stay at 4000 for couple of seconds then drop about 2600 reapply throttle revs up then down it as if something is disengaging drive then limiting revs could torque converter disengage and ecu cut power

No you have a clutch slipping. Probably caused by a sticky valve block. Drive it quietly for a while and see if the Lucas frees it.
 
next on list oil change 4l run it for a bit and then lucas and another 4l

When you drain the oil you will only get about 5 litres out. Drain change filter add Lucas and fluid to level. Run quietly and gently for a few weeks and note any improvement. If things improve drain again add further Lucas and new fluid. It may get a bit expensive but if it works it's cheaper than a new box.
 
A new fuel filter sometimes helps. Because the gearbox may be acting up doesn't mean the gearbox has the problem.

Maf sensor, engine temperature sensor, fuel filter not 100% etc. All these can upset the gearbox.

The best example of this was one sunday morning. Recovery truck arrives. This particular range rover had been to two main dealers, three independent land rovers, 3 gearbox's later, & I found the fault within two mins. Engine temperature sensor costing £15. Lots of embarissed people over that one.
 
A new fuel filter sometimes helps. Because the gearbox may be acting up doesn't mean the gearbox has the problem.

Maf sensor, engine temperature sensor, fuel filter not 100% etc. All these can upset the gearbox.

The best example of this was one sunday morning. Recovery truck arrives. This particular range rover had been to two main dealers, three independent land rovers, 3 gearbox's later, & I found the fault within two mins. Engine temperature sensor costing £15. Lots of embarissed people over that one.
Thanks for the heads up. My auto box is slipping and being weird! Also the temp gauge doesn't move, Worth a new temp sensor at minimal cost!
 
2001 P38 2.5 auto
Check the oil level. How long since an oil and filter change? Should be done every 25K miles.
If there is slip on shifts, drain the oil and check the colour and smell it should not be dark and smell bad.
Then drop the sump and follow the advice of @Henry b to check and tighten all the bolts on the valve block.
As for the temperature sensor for the gauge, check the connector first for corrosion.
Welcome to LZ. You would have been better to start your own thread rather than tag on to an old one.
 
Last edited:

2001 Range Rover Mk2 P38 Diesel HSE Automatic​

One of two sensors for pré 99 and one of three for post 99 is for the gauge and the second for the engine ecu that can effect the gearbox performance in some ways, the third being the "too late I'm bringing the fans on its cooked" to help cool the engine in an overheat situation.
😣
Only the post 99 is towards the back of the engine, the other two can't remember for sure...
 
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