L322 Range 4.4 V8 04 Auto Gear Change Down

Hi

Wonder if there anyone could shine a light on a problem i havewith my Rangie.

Sometimes lately while on a long drive and accelerate to erm say 70 and revs should be on about 2 1/2 my revs stay at around 4-5 as it accelerates giving some boot then it should drop back down to 2 1/2 as it changes down.

Well it has not been doing that, so a journey driving down the motorway resulted in me wasting a tank of fuel, it did not changing down. If i completed the boot or little kick down sometimes, it changed down after but not all the time. I turned the car off and back on, it was ok for a while, but then it happened again. I put the car in manual, it was saying i was in 3rd, on small roads where speed was less it was 2nd. I changed up in manual to 5th, but it just flicked back to 3rd or what ever. This is intermitant though. Now i think it would be wise for me to mention i do have an LPG tank as well as petrol and was on LPG when this happened. not had a chance to test on petrol, as fault is not here at the moment. When it is i will flick to petrol to test

Any ideas

Ta

Rich

Sounds like your transmission fluid is overheating so the ECU is engaging its cooling strategy mode to keep the engine speed (and therefore pump flow) high.

thanks for that i will get it checked out.

so it could be the pump? or the actuall transmission.

Thanks for your help


Rich

Or i can check this if its not too hard to do

Rich

In order of likelihood :

1) Main radiator :



2) Transmission fluid cooler (or feed/return pipes)

3) Transmission fluid cooler thermostat

4) Fluid temperature sensor in transmission wiring harness

Thanks very much for this

I will go and take it to the garage to get it checked.

Ta

Rich

Sorry for the old thread resurrection but how did you get on with this?

My L322 (incidentally also with LPG) exhibited the same problems!

THanks
Jai

jaipal2004 said:

Sorry for the old thread resurrection but how did you get on with this?

My L322 (incidentally also with LPG) exhibited the same problems!

THanks
Jai

Click to expand...

I had similar ....

changed oil cooler, all groovy

Saint.V8 said:

I had similar ....

changed oil cooler, all groovy

Click to expand...

Cheers buddy - will take a trip to my local indy and ask them to check and replace!

Yeah. So did I. Changed radiator (it was leaking slightly anyway), ATF cooler, thermostat, backplate and pipes. So far so good.

OK Long time. This fault has been back a few times..... keeping revs high in low gears to compensate for overheat. Now on occasions I have notice. Well more so I have not noticed for a few month the fault has gone. Its normally when I travel up north and normally go to the garage and give the car a once over air oil water in windscreen etc... you get the idea. Didn't actually realise the issue went away for a while, reasonable amount of time.

I pumped the tyres up. LOL Really!!!

I read an article that I cannot find now but it said that if you have wrong tyre size or pressure is out dramatically etc... it bugs out the transmission on the Range Rovers. As the computer forces the other wheels to compensate for the other wheel lacking.

My explanation is not good but you get the jist. Not to sure why apart from above, but it has worked for me.

Rich. Or am I talking crap. either way its working

Ta


Rich

The transmission controller has a 'curve recognition strategy' that prevents the transmission for upshifting while cornering – so as not to upset the rock-steady high-speed stability of the Range Rover . If the tyre pressures at the front are lower on one side of the vehicle than the other (or the tyre sizes different) the unequal rolling radii can cause the transmission ECU to believe that the vehicle is continuously cornering.

Phil

Thanks for the better explanation Phil

Cheers

Rich