has this ever happened to you

[DefcoL]

As per title I have lost my Hi / lo selection and think this might be the reason

I would like to know if any of you have ever suffered this and what the cause might be?

As there are experts on this forum I would be pleased to have their advise

1/ get new/ used t-box and replace

2/ leave as is and see what happens

3/ panic like mad about the holes in my pockets

4/ order new gear and replace my self

6/ call a grownup (this option will require a name)

whats your view on this?

TIA

[watson]

As per title I have lost my Hi / lo selection and think this might be the reason

I would like to know if any of you have ever suffered this and what the cause might be?

As there are experts on this forum I would be pleased to have their advise

1/ get new/ used t-box and replace

2/ leave as is and see what happens

3/ panic like mad about the holes in my pockets

4/ order new gear and replace my self

6/ call a grownup (this option will require a name)

whats your view on this?

TIA

my lt95 has done the same thing. the gearbox and transfer case are in 1 case or cant be split so im told

also it hardly ever spins more wheel than 1 even if the difflock is engaged

watson

[watson]

also

if it does engage does it bang about and then some times it engages and other times theres nothing???

(mostly nothing)

[bill van snorkle]

As per title I have lost my Hi / lo selection and think this might be the reason

I would like to know if any of you have ever suffered this and what the cause might be?

As there are experts on this forum I would be pleased to have their advise

1/ get new/ used t-box and replace

2/ leave as is and see what happens

3/ panic like mad about the holes in my pockets

4/ order new gear and replace my self

6/ call a grownup (this option will require a name)

whats your view on this?

TIA

That doesn't appear to be your problem.

When you say you have lost hi /low selection, do you mean the truck won't drive in either high or low , even with the centre difflock engaged? Or do you mean the range change selector collar doesn't shift backwards and forwards when you move the lever? If it's the former then the splines on the gearbox mainshaft and /or transfercase input gear have probably worn away. If it is the latter then the problem is with the selector linkage, probably external, which is a relatively easy fix.

Bill.

[nicks90]

on the high low lever just under the seat box is a pin that connects the lever to a metal bar connected to the tranny box.

the pin sits inside a stupid plastic collar/bush. If this collar splits and falls out, then the pin rattles around inside the hole in the metal bar and prevents it from moving to its fullest extent - stopping selection of high and low without getting under the motor and giving the lever a shove by hand.

[DefcoL]

That doesn't appear to be your problem.

When you say you have lost hi /low selection, do you mean the truck won't drive in either high or low , even with the centre difflock engaged? Or do you mean the range change selector collar doesn't shift backwards and forwards when you move the lever? If it's the former then the splines on the gearbox mainshaft and /or transfercase input gear have probably worn away. If it is the latter then the problem is with the selector linkage, probably external, which is a relatively easy fix.

Bill.

Hi Bill

Prior to removing t/box to have a look, I was only able to select c/diff lock and not normal drive.

This was only available in high, and happened whilst driving.

I lost all drive and was only able to select (diff lock) by moving the lever to the left engaged it and to the right disengaged all drive. Note I was unable to move the lever forwards or backwards.

stuck two miles from home I drove, BAD move as resulted in front diff exploding

so we removed, stripped,(the box) looked and took pics as above.

On reassembly we tensioned the spring ball to enable selection: C/diff lock high and low, normal high and low.

Great; all working until started engine, whereupon were only able to select (with a massive struggle) Normal drive in High and have not been able to disengage since.

I am fairly sure that the linkage is sound but will have another look this weekend.

on the high low lever just under the seat box is a pin that connects the lever to a metal bar connected to the tranny box.

the pin sits inside a stupid plastic collar/bush. If this collar splits and falls out, then the pin rattles around inside the hole in the metal bar and prevents it from moving to its fullest extent - stopping selection of high and low without getting under the motor and giving the lever a shove by hand.

Again, I am fairly sure that the linkage is sound but will have another look this weekend.

if it does engage does it bang about and then some times it engages and other times theres nothing???

As above

[bill van snorkle]

Tia,have you previously had difficulty shifting into low range ? or has this problem occurred only recently ? I feel that further diagnosis would require separating the difflock linkage from the high/low lever and operating the linkage independantly to ascertain what's going on. Back the high/low detent spring/ball plug on the right hand rear side of the transfercase right off, remove bottom inspection plate and try to shift the range change collar via the hi/ low lever with the help of a large screwdriver against the collar if necessary. If you are certain that the collar is fully engaged with the dog teeth on either high or low gear the vehicle should drive. If it doesn't drive and makes horrible crunching noises the Spidergears in the centre diff have broken, but you will still get front wheel.drive if you lock the diff. If you manage to engage low range, ie collar moved forward and engaged with dog teeth on large gear, but the engine stalls when you try to move off, it is because the high range (smaller) gear has partially seized onto the centre diff carrier. In this case the vehicle will drive or attempt to drive with the shift collar in the neutral position also. Just so we are both clear, your photos show the transfercase gears in low range.

Bill

[JST]

Lawrence sorry cant help other than to say ring Dave at Ashcrofts, get some shallower pockets and your truck doesnt seem to be bedding in quite as we would all have hoped.

Stick with it, it will be worth it in the end.

[DefcoL]

have you previously had difficulty shifting into low range ? or has this problem occurred only recently ?

Only recently, ie: started having difficulties with selection on last event. Prior to removing t/box to have a look,

I was only able to select c/diff lock and not normal drive. This was only available in high, and happened whilst driving.

I feel that further diagnosis would require separating the difflock linkage from the high/low lever and operating the linkage independantly to ascertain what's going on.

Yep tried that and was able to operate and select

Back the high/low detent spring/ball plug on the right hand rear side of the transfercase right off, remove bottom inspection plate and try to shift the range change collar via the hi/ low lever with the help of a large screwdriver against the collar if necessary.

On reassembly we tensioned the spring ball to enable selection, and was rewarded with:

C/diff lock high and low, normal high and low.

If you are certain that the collar is fully engaged with the dog teeth on either high or low gear the vehicle should drive. If it doesn't drive and makes horrible crunching noises the Spidergears in the centre diff have broken, but you will still get front wheel.drive if you lock the diff. If you manage to engage low range, ie collar moved forward and engaged with dog teeth on large gear, but the engine stalls when you try to move off,

No crunching or noise, no stalling as was able to select normal high drive,

“Great; all working until started engine, whereupon were only able to select (with a massive struggle) Normal drive in High and have not been able to disengage since.”

it is because the high range (smaller) gear has partially seized onto the centre diff carrier. In this case the vehicle will drive or attempt to drive with the shift collar in the neutral position also. Just so we are both clear, your photos show the transfercase gears in low range.

Bill

it was driving in neutral when moved to the left and no drive when moved to the right.

Now just stuck in normal high after being selected ie: moved to the right and towards the back of cab.

one possibility is that the linkage has bent thus not allowing full movement. will get it over the pit hope to find something obvious.

Are you sure that the damaged gear will not be the problem?

And if so, How long will the gear remain operational with that amount of damage already sustained?

All help and advice welcomed

T hanks

I n

A dvance

Defcol

[Rednex]

Hi there!

Did u manage to solve the issue? I'm very interested in how.

I do have similar problem on my Def 90.

1st time I got the lo/hi shifting stick in tranny broken. Fixed that one, had everything working for a while, but now do have same difficulties.

Was blaming to wear on gears, but was told that should not be a root cause (my wear actually is less than yours).

So - thanx in advance for any clues!

[DefcoL]

Hi there!

Did u manage to solve the issue? I'm very interested in how.

I do have similar problem on my Def 90.

1st time I got the lo/hi shifting stick in tranny broken. Fixed that one, had everything working for a while, but now do have same difficulties.

Was blaming to wear on gears, but was told that should not be a root cause (my wear actually is less than yours).

So - thanx in advance for any clues!

sorry for late reply ....

I am still on same box, Was advised (because of Auto) to turn engine off before shifting ...it works but engine dose not after cam belt fail mid challenge

great even, my team mate done a front drive and i done a wing, headlight, wing mirror, rear winch (again) and cam belt+

but a brill site nr tring....

Good luck with you box

[forklift]

I hate to say this but I would hazard a guess that the two pins that hold the planet gears in the centre diff have broken. you can see the outside of the two pins that should be flush with the cylindrical body of the centre diff if they are loose or sunk in/sticking out then they will be broken on the flat parts where they cross each other. You can confirm this by looking down the centre diff from one end once you have pulled it off the shaft. The wear on the teeth you can see is extremely unlikey to be the cause of you problem.

The two pins in question are the small ones in the top right hand side of the pic with the flats on the middle of their shatfs. You will not see them like this unless you pull the diff apart as it is much more compact than the diffs on the axles.