No 4wd..

[clivehorridge]

I originally only posted the sticker on the door pic as it supports what i said about "only when your stuck" . But as i had the owners manual to hand i thought why not post it at the same time because this guys been given lots of advice relevant to an LC80 and not relevant to an LC90 . I've got a Haynes Workshop Manual here as well but i figured i'd be here for hours posting just the pages relating to diff .

Thanks Shayne for helping to put Ben Edmunds straight after I filled his head with 80 nonsense. I blame the beer I had on Sunday night after a day tidying up the garden!

I love those door stickers though, designed to be ignored (to some extent anyway) ! The rear locker's great when climbing in heavy clay as long as you're going in a straight line. When cornering it causes more trouble than without. I reserve the front for very special occasions, normally 5 minutes before I'm looking for a tree (or ship's mast!).

 

[Shayne]

As a novice myself i could clearly see how this thread was becoming as clear as mud for any other novice trying to follow it , just pointing out the 80 and the 90 are very different toys . I am still very curious though about the 2wd issue ?

 

[clivehorridge]

Me too Shayne, that's what got me into this thread and into trouble at the same time. Come back Ben all is forgiven!

 

[benedmonds]

Cheers for the advice, I tried the 4wd spin on gravel, checked for the propshaft.. Looks like it is in 4wd. I paid attention to the 4Wd control and am not sure it is good.

It runs fine and drives in HL (high speed with center diff locked) and in LL (low speed center diff locked) although its offroad ability seems lacking.. No dash lights on ..
But stick it in H and it doesn't go anywhere but makes a nasty grounding sound....

If you try to lock the rear diff as per page 127 (thanks shane) the diff light flashes
Ben

 

[BobMurphy]

But stick it in H and it doesn't go anywhere but makes a nasty grounding sound....

Ah Ha !!

So it doesn't move with the centre diff open. Now that makes sense.

Something is broken somewhere - but is it front, middle or rear .

So . . . Where is the grinding sound coming from??

Front = A broken drive shaft or (worse) the front differential has failed.

Middle = Centre differential in the Transfer Box. A broken Planet Carrier would cause this effect (I've seen a couple of these).

Rear = A broken half shaft or (worse) the rear differential. The rear is quite strong so my guess is it'll be front or middle .

Can you let us know where the noise comes from and we'll put our collective heads together.

We'll get there yet.

Bob.

 

[clivehorridge]

Welcome back Ben!
That's it from me, I got into trouble last time... Good luck with your drive train, sounds nasty. These guys will sort you out eventually!


Sent from my iPad using Tapatalk

 

[Chris Green90]

Cheers for the advice, I tried the 4wd spin on gravel, checked for the propshaft.. Looks like it is in 4wd. I paid attention to the 4Wd control and am not sure it is good.

It runs fine and drives in HL (high speed with center diff locked) and in LL (low speed center diff locked) although its offroad ability seems lacking.. No dash lights on ..
But stick it in H and it doesn't go anywhere but makes a nasty grounding sound....

That sounds to me like an issue with the transfer box wheree he center locker isn't disengaging, It could be possible that driving with he center locked on tarmac has caused some transmission wind up. Bob Murphy is the man in the know whatnn it come to TC's and I am sure he will be along soon with his input.

Rear Locker knackered in my opinion. This is a common (and costly) fault. As far as I can remember they are rebuildable but to do that you need to get it off in one piece and that is a challange in itself. There have been quite a few of us on here that have replaced them and milners one are OEM parts. Again Search for Bob Murphey for a full write up on how to do it (might be on the Dark side)

 

[Chris Green90]

Ah Ha !!

So it doesn't move with the centre diff open. Now that makes sense.

Something is broken somewhere - but is it front, middle or rear .

So . . . Where is the grinding sound coming from??

Front = A broken drive shaft or (worse) the front differential has failed.

Middle = Centre differential in the Transfer Box. A broken Planet Carrier would cause this effect (I've seen a couple of these).

Rear = A broken half shaft or (worse) the rear differential. The rear is quite strong so my guess is it'll be front or middle .

Can you let us know where the noise comes from and we'll put our collective heads together.

We'll get there yet.

Bob.

Damn Bob you got in there whilst I was typing

 

[Shayne]

Yikes H is for normal driving somethings very wrong there . Yet you have power to all 4 wheels but only with your centre diff locked . I'm sure somebody on here can give you a very clear idea of what part of the jigsaw is missing now you've explained that .

When the rear diff switch flashes i think it means its not yet engaged . I believe the wheels must turn at least one full revolution before it can engage even if it's not like many others completely seized from lack of use . Mine does the same but looking at it on the axle it looks in very good nick so i'm hoping when i find time to take it off and strip and clean everything it might be salvaged .


Just thinking outside the box for a minute before the old pro's start rubbing their hands together and dissecting your entire drivetrain with relish i will ask for you -

Could it possibly be something simple like the lever linkage ?

 

[Chris]

Shayne where did we deduce that there is power to all 4 wheels? With the centre locked it will drive with only the rear wheels connected. I suspect there is no drive at all at the front. I agree with Bob, this could be in the box or at the axle end. Easy to drop the prop and see.
When the light flashes it does not mean that the locker isn't engaged. It only means it MIGHT not be engaged. It could easily be a faulty switch on the housing. Very common.
The wheels don't have to turn for the locker to engage. They sometimes will lock without moving at all.

I'd completely forget about the rear locker for now. It's not relevant to the problem at all and will only confuse the issue. We can sort that later once there is full drive to all 4.

As to wind up, there is altogether too much made of that. The Colorado is not a Landrover with a sloppy driveline and twiglett drive shafts. Turning 90 degree corners on grippy tarmac isn't going to be fun, but having it locked in a relatively straight line isn't the end of the world.

There are other tests that are needed to narrow this failure down.


C

 

[Shayne]

Quote benedmonds "I tried the 4wd spin on gravel, checked for the propshaft.. Looks like it is in 4wd."

 

[Chris]

Sorry Shayne, that means nothing. How can you tell it's in 4WD by looking at the prop? Even if you could see underneath and see if the prop goes round, it could be driven by the wheels, not the transmission. The props go around even if a car is in neutral rolling down a hill.

It's just not conclusive matey. If it won't drive in High - unlocked then that means that the drive is 'escaping' somewhere. As soon as you lock the centre drive has to go forwards and back - but if the diff is bust at the front there will be no drive even though the prop is going around.

The wheels need to come up off the ground really. What we can't tell from the evidence so far is whether the front drive train is busted or it's in the output of the centre box.

Chris

 

[Shayne]

He started this thread because he thought he didn't have 4x4 at all yet he is still driving the truck , I suggested a simple wheel spin on grass would tell him which wheels had power because a 2wd will only leave 2 skid marks . He tried it on gravel and evidently all 4 wheels spun .

However he is driving with the centre diff locked all the time and if he unlocks it he has no drive at all and a grinding noise instead .

This is why i asked the question for him - is it possibly something simple like the linkages beneath his gear lever are damaged so when he tries to select H the gear below is not engaging as it should ?

 

[Chris]

I'm sorry Shayne but the 4 WD spinning test just isn't valid really. If there is something broken, you may still have some drive and this drive would be most evident on a loose surface. Now, spinning all 4 on tarmac would be more conclusive. If you read his reply he says he tried the wheel sin test. It doesn't actually say that all the wheels went around.

Looks like the OP is a bit of a novice when it comes to the drive system here and tests just have to be more definitive than 'find a field or gravel and floor it'. Unlikely to be damage to the linkages. Have you seen them? They are internal to the box too, not something on the outside.

Clearly it's not going to spin all four if the centre isn't locked - not if it's making that kind of noise.

We need to take him though a series of workshop tests to detect where the problem is. Wild guess aren't going to get us there. Not this time.

We any idea where Ben is? I wish people would put their location in the side bar as requested. He could be near to someone who could have a look and tell in minutes.

C

 

[benedmonds]

We any idea where Ben is? I wish people would put their location in the side bar as requested. He could be near to someone who could have a look and tell in minutes.

C

As some have figured I am a novice when it comes to this... I am based in the East Midlands, between Nottingham and Derby. I am going to have to find a friendly mechanic, but it might wait. I don't really want to spend alot. Can anyone recommend a specialist in the area? Will let you guys know the outcome.

 

[Chris]

Ben, check out my side bar. My location is East Midlands. Follow the A38 through Alfreton and you'll get to me on the South side of Chesterfield. More than happy to have a look at it for you. There isn't a specialist in the area other than Toyota. And if you go in there, they'll just say you need a new one of these, these, this, 4 of those, £2500 please!

If Bob wants to suggest a series of diagnostics (front left wheel in the air, locker in sort of thing) then I can go through them. I've had 90s in bits so I know what I am looking for.

Chris

 

[benedmonds]

Ben, check out my side bar. My location is East Midlands. Follow the A38 through Alfreton and you'll get to me on the South side of Chesterfield. More than happy to have a look at it for you. There isn't a specialist in the area other than Toyota. And if you go in there, they'll just say you need a new one of these, these, this, 4 of those, £2500 please!

If Bob wants to suggest a series of diagnostics (front left wheel in the air, locker in sort of thing) then I can go through them. I've had 90s in bits so I know what I am looking for.

Chris

Cheers Chris, I might do that! Ben

 

[Chris]

Well Ben, I can't help you anymore than that. It's up to you. It's a free look-see, I don't run a garage business - it's just my drive. I should be able to work out what's going on. Not saying I can fix it for you. But you never know. I may be able to isolate the problem at least.

If you get a better offer then feel free to take it.

PM me if you want to come over.

Chris

 

[AndyCook]

Good man Chris

 

[adrianr]

Good Man.

If it was me I'd be round in a flash to take up that offer!