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Landcruiser D4D Lc5 Auto Gearbox


MadMax1955
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Any suggestions please. I have Landcruiser D-4D LC5 Auto gearbox, 2002 with 85K miles.

Just recently - it is reluctant to change gear when I have my foot hard down. Seems to be worse going into 3rd and 4th. If I drive it gently it changes gear perfectly.

If I lift my foot and wait 10 seconds or so it changes perfectly.

I dont appear to have any oil leaks - any suggestions please.

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Any suggestions please. I have Landcruiser D-4D LC5 Auto gearbox, 2002 with 85K miles.

Just recently - it is reluctant to change gear when I have my foot hard down. Seems to be worse going into 3rd and 4th. If I drive it gently it changes gear perfectly.

If I lift my foot and wait 10 seconds or so it changes perfectly.

I dont appear to have any oil leaks - any suggestions please.

hi mate

the gears shifting is controlled by each gear solenoid valve passing hydr oil into the respective responsible power cylinder. The solenoid gets command from rpm sensor. What are the possible reasons:

- dirty A/T oil/filter;

- delay with el signal from rpm sensor to solenoids of 3-4th gears power cylinders;

- solenoinds stems got partly rusted and do not slide easy leading to delay of opening and passing an A/T oil into the resppective power cylinders.

AS you can observe good performance when gently shifted it is presumed the possible issues might be as listed above.

Cheers/Igor

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Any suggestions please. I have Landcruiser D-4D LC5 Auto gearbox, 2002 with 85K miles.

Just recently - it is reluctant to change gear when I have my foot hard down. Seems to be worse going into 3rd and 4th. If I drive it gently it changes gear perfectly.

If I lift my foot and wait 10 seconds or so it changes perfectly.

I dont appear to have any oil leaks - any suggestions please.

hi mate

the gears shifting is controlled by each gear solenoid valve passing hydr oil into the respective responsible power cylinder. The solenoid gets command from rpm sensor. What are the possible reasons:

- dirty A/T oil/filter;

- delay with el signal from rpm sensor to solenoids of 3-4th gears power cylinders;

- solenoinds stems got partly rusted and do not slide easy leading to delay of opening and passing an A/T oil into the resppective power cylinders.

AS you can observe good performance when gently shifted it is presumed the possible issues might be as listed above.

Cheers/Igor

Thanks very much. Very Useful.

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I have similar problem. Similar model, similar mileage.

Started suddenly yesterday about 20 miles after driving in snow over very rough frozen ground - which later melted into deep mud and rocks.

Gearbox seems ok except in 3rd to 4th.

Will change up if I slow down and coast, then accelerate VERY gently.

Otherwise, if I attempt to continue to accelerate above point where gearbox should change up,

either engine will not speed up (as if a governor has cut in) or

engine will power-up rapidly which results in gearbox dropping down a gear.

Sometimes a degree of "mechanical indicision" - not sure what it is going to do... changes down-up-down

Does not seem to happen if going downhill.....

??Same probable causes??

Dirty A/T filter/oil leading to poor flow sounds likely, hence no problem at low torque -

- but possible problem with poor signal from rpm sensor to 3/4 solenoid (salted roads / loose connection)

Any other ideas or previous experience of this????

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I have similar problem. Similar model, similar mileage.

Started suddenly yesterday about 20 miles after driving in snow over very rough frozen ground - which later melted into deep mud and rocks.

Gearbox seems ok except in 3rd to 4th.

Will change up if I slow down and coast, then accelerate VERY gently.

Otherwise, if I attempt to continue to accelerate above point where gearbox should change up,

either engine will not speed up (as if a governor has cut in) or

engine will power-up rapidly which results in gearbox dropping down a gear.

Sometimes a degree of "mechanical indicision" - not sure what it is going to do... changes down-up-down

Does not seem to happen if going downhill.....

??Same probable causes??

Dirty A/T filter/oil leading to poor flow sounds likely, hence no problem at low torque -

- but possible problem with poor signal from rpm sensor to 3/4 solenoid (salted roads / loose connection)

Any other ideas or previous experience of this????

Hello Cassiterite - it does seem identical to my problem. The more I have driven mine since posting, you have explained the issue more accurately than I did. It has to be the same problem.

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Had advice from professional motor mechanic (non-Toyota)wo confirms

Probable cause 1: low A/T oil or contaminated A/T oil

2: corroded electrical connection

Recommended fastest solution - get Toyota dealer to run diagnostics.

We shall see.......

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Had advice from professional motor mechanic (non-Toyota)wo confirms

Probable cause 1: low A/T oil or contaminated A/T oil

2: corroded electrical connection

Recommended fastest solution - get Toyota dealer to run diagnostics.

We shall see.......

Hi Cassiterite - Had the electrical connection checked and sprayed with WD40 - no change. I thing I have noticed, mine is much worse when first driving the car, ie when the oil is cold and thicker. My friend checked the computer diagnostics and there were no warnings recorded. I'll keep you updated. Colin

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Hi MadMax1955

Some good news and some bad news:

Yes, syptoms much worse when starting from cold - even had problems getting it to change-up from 1st yesterday.

My mechanic friend phoned. I had mentioned that it "felt like a governor was cutting in". Having thought about it, he said yes, it can work like that as throttle ultimately controls gearchange. He said throttle malfunction can sometimes give these symptoms but cause may not show-up without reading malfunctions from memory. (In the meantime the A/T warning light had started coming on from time to time and it was getting embarrassing going uphill after joining a dual carriageway or leaving a roundabout!)

So......Had diagnostics checked-out by Toyota. Showed problem with SCV valves in fuel system and governor(!).

Costs: SCV valves £69.94 fitted, Governor kit £219.54 fitted (ouch!). plus VAT £50 ('till new-year!).

"Bit the bullet" as need to use 4WD for work, so had it done earlier today (1hour).

Good news: Problem solved. Can't complain about dealership service.

Bad news: Cost.

Maybe you can get the parts and fit yourself (or with help from your friend) cheaper, if you have time...... - BUT don't know if any systems have to be reset etc.

Assuming yours is same problem, maybe this is a common or known fault (bit of a co-incidence otherwise!)

Would not have expected this from a Landcruiser - Don't suppose Mr Toyoda will admit it though.

Anyone else out there had this problem?

....Also - watch out for corrosion on unions on bottom A/C pipes - [A/C specialist said: "known problem" .... but Mr Toyoda say Nooo!]

Best of Luck

SnO2 (Abbreviation for Cassiterite!)

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Hello Sir - mine is in the main dealer now. As you say, got almost impossible to drive when cold. Fingers crossed and thanks for the update. Colin

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  • 4 years later...

Hi All,

I have a very strange problem in my Land Cuiser LC5 (2005 Model ) Auto Transmission.

1. The vehicle auto transmission - gear change is not going after 3rd Gear. The auto transmission works fine till 3rd gear - not going up to 4th and above or overdrive.

Actions compeleted :

1. Visited Toyota delear - Jemca Toyota Edgeware Road. Got all the checks - Run the diagnostics. No issues.

2. Advised - Auto Transmission fluid change - 2 times flushed out -

3. No change - same issue.

4. Final conclusion from Jemca - change the gearbox.

Took to a Auto Transmission specialist .

1. He agreed to re-construct the gear box for £1500 -

2. He had run the diagnostics no faults. He had done complete re-fitting/construction of the gearbox - No issues found.

3. Tested the solenoids - No issues.

4. He also sort of gave up

5. He is waiting for an appointment with Electic specialist in the auto transmission area.

Updates as on 19/May

1. Situation changed - now electrical problems along with gear not shifting above 3rd gear or overdrive.

2. When you switch on the headlight or A/C or wiper - the speedometer go down to zero. Switch off the other electricals (Fan/Wiper/Headlight) - speedometer works fine. Looks like electrical load is not maintainted.

3. When start in the morning - gear **** is really jumping. Looks like low power supply.

Anybody can help - suggestions welcome.

Thanks

Sajeendra

Update on the Gear shift issue : May 2015

Took the vehicle to Overland Cruisers - Julian had a look and spotted the issue immediately. It was a problem with earthing in the engine. Removed the lose earthing from engine and body side. Fixed new earth bolts. Perfect gear shifting . Julian is a real genius with respect to Toyota LCs.

I would recommend - any issues - if possible visit Julian.

Thanks

Sajeendra

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  • 5 months later...

Sajeendra

Did you ever get the problem resolved ?

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Sajeendra

Did you ever get the problem resolved ?

Taken from the previous page.

Update on the Gear shift issue : May 2015

Took the vehicle to Overland Cruisers - Julian had a look and spotted the issue immediately. It was a problem with earthing in the engine. Removed the lose earthing from engine and body side. Fixed new earth bolts. Perfect gear shifting . Julian is a real genius with respect to Toyota LCs.

I would recommend - any issues - if possible visit Julian.

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Thank you very much , i have exactly the same problems and have just emailed julian i will keep you posted wish me luck

stu

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  • 4 years later...

Hi i have problem with 2010 lc4 auto gear box make vibrating sound as if driving on rough surface .Seems to happen between 50 to 60 mls per hr. otherwise gearbox fine.any ideas what cause could be.

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19 hours ago, Wm O Neill said:

Hi i have problem with 2010 lc4 auto gear box make vibrating sound as if driving on rough surface .Seems to happen between 50 to 60 mls per hr. otherwise gearbox fine.any ideas what cause could be.had tracking done. had wheels   balanced to no avail. if i press down on accelerator a little or take foot off a little noise stops

 

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