toyota hilux surf overdrive light is flashing

[alkanaft]

Hey guys, I'm new here so let me know when I've done something wrong

So my problem is that the overdrive light in my toyota hilux surf 2.4 turbodiesel 1992 is flashing after about 30 min of driving. when this happens, the car is really slow going forward, the ram's are going up really slow even when I'm going into the kickdown there is no change or shifting. When I'm in the first gear it's the same, it goes really slow, so doesn't matter if it's in drive or low gear.

Sometimes if I turn of the car for 10 min it works again on about 80% of power

Even in the morning my car is struggling to go up the ramp in the basement.

I've been to 3 mechanics yet, nobody knows really what it could be, anybody help or an idea 💡

Edited February 22, 2015 by alkanaft

[trentmeyer23]

Is it revving high when you are moving slowly?

[alkanaft]

No the Rev's are going up really slow aswell even when I put it in the lowest gear in the automatic transmission

[CONROD]

Bugger going to a mechanic, go to a automatic trans specialist. Could be as simple as a service.The filter in the auto could be clogged and its starving, and because the pressure has dropped off the ecu controlling the auto( assuming it is electronically controlled) has gone into limp mode.

[trentmeyer23]

Bugger going to a mechanic, go to a automatic trans specialist. Could be as simple as a service.The filter in the auto could be clogged and its starving, and because the pressure has dropped off the ecu controlling the auto( assuming it is electronically controlled) has gone into limp mode.

Being a 92 model, I would very much doubt it is ECU controlled.

Is it slow to travel in reverse?

[alkanaft]

I've been to the transmission specialist, he wasn't sure what it could be, so he send me to an engine specialist, and he send me to an auto electrician where the car is since Tuesday now, when he didn't find something I will leave it at the transmission specialist again to get the service done

Yes even in reverse it is slow, like hardly moving back

[Lozz]

G'day Herbert,

Does your 92 run a A43D auto??

There could be many possibilities that could be at fault mate, unfortunately is not an easy find unless you stumble across it!!

As was advised earlier, the Trans service is a really good start, but I don't think it will rectify the issue, however does need to be done.

This Auto is primarily hydraulicly actuated, meaning the first 3 forward are selcted by hydraulic pressure and the 4th is electronically selected via a solenoid in the valve body

A couple of questions though: When you select R or D does it drop in gear straight away with a thump or is it slow and sloppy?

It also seems, from your description it only plays up when you have reached operating temperature??

Does your engine still have power at operating temperature? Or is it a situation where the transmission has lost power at the rear wheels (like its slipping) but you still have full engine revs and or power??

Edited February 22, 2015 by Lozz

[alkanaft]

Hey mate

Actually my car is at the auto electrician, when I get it back I can check what auto it runs

It depends actually when the car is cold it drops in gear straight away until I run the car for about 20-30 min it is Realy slow and sloppy This happens

happens at the same time when the overdrive light is flashing, sometimes it stops flashing on the drive, but still slow moving forward

I've checked the temperature all the time when it happens it is in normal temperature area, it has even no power after about 30 min running the Car.

Your last question is exactly right except that it looses engine Revs aswell

And one day It stopped at the traffic lights for about 5 min and couldn't get up the hill, I'd tried it on every gear, but the Rev's would only run up to about 1500

After 5 min of trying everything is could think of, it slowly started working again

[Lozz]

G'day Mate, Ok I think I may have a solution for you or part there of 👍

Fundamentals of oil & temp: low temp = high oil viscosity / high temp = low oil viscosity!!

Regardless of oil weight. Having said this multi-viscous oils resist this from happening to a certain extent.

Hydrolic oil (like Auto Trans oil) is not multi-viscous! And is commonly single weight, that's why we have to replace the Auto oil to the manufactures specs as the transmissions are designed to operate on a particular grade/weight of oil.

I believe your Auto Transmissions oil pump is faulty/worn out?? This can result from many things however the most common causes are: 1 - insufficient services. 2 - oil in pan has run low and the pump sucks air.

3 - excessive kilometres.

In order to fix this you will have to remove your transmission from the vehicle, remove the torque converter then remove the bell-housing! This will enable you gain access to the oil pump of the transmission.

I would recommend to find a suitable replacement pump from a used trans at a wreckers with low Km's, or ask your local Auto Trans guy to locate one for you, as they have really good contacts.

You can replace the gears in the oil pump but you may still have a worn housing (sometimes it works, sometimes it doesn't). These pumps are designed for the life of the trans, and a good second hand replacement pump as a complete unit is the way to go. Your choice??

Attached are a couple of photos of what the trans oil pump should look like.......

Now I cannot guarentee what condition the clutch packs are like in your transmission though!!

If you do go ahead and do this is is probably a good idea to install an external trans oil cooler too.

That should solve the transmission problem but not the engine problem??

As to why your engine is loosing power is another thing all together! This could simply be a coincidence, and the resulting cause could be you injector pump is on its way out, but I dought that!!

I really think the only way to find a solution is to tackle 1 thing at a time, and start with the trans oil pump, then move to the next. If you really love your truck and want to keep it, that's what I would do.

Or the other way is to replace the trans as a complete assembly?? Your decision again though.

I really hope this sheds some light on your situation mate?? 😜👍🍻

[alkanaft]

Mate thanks a lot for your effort,

This gives me some hope

You definitely helped me to find the issue, I've booked in the transmission specialist for Thursday again to tell him to do the service step by step, my beauty is still at the auto electrician .

I let you guys definitely know what's going on as soon as possible, have good evening

[alkanaft]

Actually I went to the transmission specialist,

It's probably the torque converter that's broken, some metal things in the oil.

I got a quote to get it all done with cleaning out the gearbox for 3000 $