A/T oil light on lc100td

Submitted: Friday, Sep 02, 2011 at 11:36
ThreadID: 88803 Views:2342 Replies:3 FollowUps:0
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Hi All

Im seeking info on the above problem if others have had the same.

Ive got an 06 LCTD sahara. Under normal driving operations it performs great. The problem starts when ive got the van on the back. The first time it happened was about 6mths ago in hot weather driving to perth from the NW. We encountered road works that had us stopping and starting, so when the light came on i just assumed it was because of air flow ( i was driving in D as advised by toyota service manager). It happened again on a hot day 4wd in the dunes and beaches around Coral Bay. I made a few phone calls and dropped vehicle off at Melville Toyota who specialise in transmissions for WA once we arrived. On speaking with them they informed me it was light 1.5lt, which surprised them as its WS oil and rarely needs replacing. I thought ok problem fixed and headed back north. This time i drove in 4th sitting on 95 / 2600rpm. Car did it easy and we averaged 18.5lt/100km. When we got back to Port Hedland again encountered some slow traffic and i was surprised to see the AT light come back on. I had to idle car for 20 minutes before the light went out.
My concerns are that the previous owner has done some heavy towing in D and may have damaged the g/box. i intend on getting an oil analysis to see whats going on.

Any idea's or similar circumstances related would be great. Thanks in advance!
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Reply By: Dust-Devil - Friday, Sep 02, 2011 at 13:48

Friday, Sep 02, 2011 at 13:48
Dude! for stuff like this you really have to go to the LCOOL forum, which, if you don't already know is the place to find out anything and everything about any model Toyota ever sold in Australia and Globally.

You have to become a member, however it's FREE , repeat FREE and I am dead set sure this is where you will find the answer/s to your questions.

This the link for LCOOL:



AnswerID: 464048

Reply By: Bob Y. - Qld - Friday, Sep 02, 2011 at 13:55

Friday, Sep 02, 2011 at 13:55
By your post it appears the warning light only comes on when at low speeds, or doing heavy 4WD work. The missing 1.5 L of oil wouldn't have done it any favours, especially in your climate.

Unless there is some damage to lower gears, I'd suggest it's a cooling problem. Even if the engine isn't showing any overheating problems, clean the external cores of the radiator, and air con evaporator thoroughly with compressed air, then water, and perhaps think about an A/M tranny cooler.

If the fluid looks at all dark, or discoloured, get it changed too. The tranny cooler won't fix any problems you may have inside the auto, but will help the auto do its thing better, especially towing the van.

Doubt if the previous owner has damaged the auto, if it doesn't overheat in D. But doubt if it would have done it any good either. It's been well documented on this site about towing in 4th, rather than Drive, and would expect that the engine & auto would run cooler, in the lower gear.

Hope you get it fixed, and find the problem.

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AnswerID: 464050

Reply By: snoopyone - Friday, Sep 02, 2011 at 14:54

Friday, Sep 02, 2011 at 14:54
The vehicle already has a trans oil cooler on it standard It is in front of both the A/c and water radiator in the top L/h corner..

Sounds strange as we travelled 50,000k with nearly 3000kg on the back and my light never came on even on days of over 40c.

We NEVER towed in 5th and the handbook suggests the same if towing heavy trailers

Lcool will probably help but one suggestion would be to bypass the pipe through the radiator and run it straight up to the oil cooler on its own.

Not hard to do We used to do it all the time in NZ on Coronas which had a bad habit of cracking the pipe in the radiator and leaking water into the trannies.

Another thing could be the radiator needs a clean and water is too hot.

Easy to fit a temp gauge on as well I had one in the out pipe( the lower one) from the tranny to the cooler and it rarely read over 70c except on a long hill on a hot day and then only got up to 95c which is not excessively hot.
AnswerID: 464054

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