Viscious Centre Diff conversion to manual

[alltrans]

Have a 93 RR with Viscious centre diff lock and am not that over pleased it it's performance.

Is there a conversion kit that permits removal of the existing Viscious and replace it with a Manual Centre Diff Lock.

Appreciate any advice

Barry

[Rangier Rover]

LT230 out of a Disco or pre viscous Rangie, You will need the longer out put shaft and linkages etc.
I'm also putting a LT230 on my 89 model. Hopefully out of a Defender as has lower high range to help with the oversize tyres.

Tony

[buzz66]

I will be using the electric diff lock actuator when i do this mod next month
on my 89 model

[p38arover]

Have a 93 RR with Viscious centre diff lock and am not that over pleased it it's performance.

Is there a conversion kit that permits removal of the existing Viscious and replace it with a Manual Centre Diff Lock.

Get a viscous coupling, they are not as vicious. :angel:

The conversion to an LT230 is, I'm told, relatively easy.

[Pierre]

Beastly, Ron.

Pete

[p38arover]

I wonder if a replacement VC would be cheaper and easier?

[alltrans]

Thanks Guys,

The problem I found with Viscious is that it does not operate unless the front wheels spin, am told they only need about quarter of turn in soin and the viscius locks up and does the job....this works well, unless you get in the problem I encountered.

Front wheels on rock, rear on soft sand, back wheels spun, thus no drive to front wheels..thus am circumspect about the viscius centre diff.

It was tested after the event and was found to be working as designed, 1/4 turn slip and locks ups - but that dosent help if cannit get the front wheels to slip....viscious really handly on the black top when roads are slippy, but not so good in the circumstance I was in.

Thanks for your ideas and tips

[Scouse]

found to be working as designed, 1/4 turn slip and locks ups - but that dosent help if cannit get the front wheels to slip....The slip it detects is front to rear slip, not front side to side.
It should have locked up in your case.

[buzz66]

I find I can't steer at all in reverse on steep loose terrain.

I don't think the VC locks up too well with torque applied from the wheels back into the drive train. They certainly lock ok with torque from the gearbox direction.

Can anyone confirm this?

I have a differnent technique when reversing back down steep loose terrain. I use 2 feet. One on the brake, Auto selected in first gear. Other foot on the accelerator with a touch above idle on the throttle. I ease off the brake and let let the vehicle start to go backwards, when the bitch won't steer and starts to swing around in the front I give it the gas to straighten up then let it go again. Works for me.

I'll never forget the first time my brother went from his old 84 model 4 speed with the LT95 transfer case and got into his new 90 model. He nearly **** himself when he tried to back down hill. He said to me "how the **** do you drive this thing"

I said "thank god it's not just me. I was starting to think I couldn't drive for ****"

He was so used to throwing the old 4 speed into reverse taking his foot of the brake and driveing with the throttle down hill.

I should have an LT230 with crawler gears in mine by early September with any luck........ and a pile of money thown in.

Looking forward to reversing down a hill without the front trying to overtake the back.

[p38arover]

I see it's still dangerously viscious! :p

[mike 90 RR]

Front wheels on rock, rear on soft sand, back wheels spun, thus no drive to front wheels..thus am circumspect about the viscius centre diff.

Take the rear tail shaft off ... and go for a drive ... This test will reflect the circumstances that you described

It should operate drive to the front as per normal /// if it does // then it's not your Viscous at fault

Mike
:)

[mike 90 RR]

I find I can't steer at all in reverse on steep loose terrain.

I think you will find it's more the Auto box ...rather than the Viscous

You get no direct engine lock at low speeds ... verses a manual, which does

Scary tho, having the nose come around, ain't it :p

Mike
:)

[Grimace]

I never really had the nose trying to come around to a point that it has been scary or completely uncontrolable?

Maybe my viscous is working well?

[mike 90 RR]

I never really had the nose trying to come around to a point that it has been scary or completely uncontrolable?

Maybe my viscous is working well?

My bro has a D2 Auto, and lent it to me for a drive in the dunes ... So I found the steepest one to go up, and only got up half way .. Huge incline, real soft :)

Anyways ... Have to reverse it .. OK / Put it in neutral and coast down // Took foot off brake and "straight up" felt the front end move to the side :(

// STOP // OK ... try again in 1st gear forward .... and again "straight up" felt the front end move to the side :(

// STOP // OK ... so we are gonna have to put it in reverse gear and DRIVE it down :( (this should be interesting, I'm thinking) ;)

Now here's the drama .... You have to drive it in reverse gear backwards, to stop the front end from swinging around // The best part is the ABS /// When you want to slow down ... You can't .... cause the brake pedal refuses to lock up the wheels /// The modulator keeps kicking your foot off the pedal and you can't actually lock up the wheels in the soft sand to make it bog in and stop

Not funny when you have to do a sharp turn at the bottom of the dune .... in reverse .... to avoid going over & down the next sand ridge ;)

and now I found out since, that you can turn the ABS off :angel:


Luck-ely ... I have a RRC with no ABS :D

Mike
:)

[LOVEMYRANGIE]

and now I found out since, that you can turn the ABS off :angel:
I do, how do you turn it off???

If you want to dig in, just shift into drive with foot on the brake while you still going backwards and lift it just above idle, but I never had issues backing down a sand dune..... I never really had to... :angel::cool:

[mike 90 RR]

I do, how do you turn it off???

On his disco ... car stopped / engine running / pump the pedal 10 times?


but I never had issues backing down a sand dune..... I never really had to... :angel::cool:

Yea,, Yea :p

[LOVEMYRANGIE]

Hmmmm... does it light up on the dash or anything and how do you turn it back on again...?

Probably different to mine plus being a D2 its later anyway....

Worth a try tomorrow tho...

[mike 90 RR]

Hmmmm... does it light up on the dash or anything and how do you turn it back on again...?


Unsure (cause it's not my ride) ... But I believe the ABS light comes up /// To reset it ... turn the motor off


Errrr ... I think we are hijacking this thread .....

[newmanps@bigpond.net.au]

I have recently completed this conversion in my 94 Classic.THE L230 is a stronger transfer case especially if towing, however it is noisy in comparison,even having it reconditioned.You will need front tail shaft,quill shaft from auto,right mount,gear leaver and support bracket.You may need to check fr, & r diffs for planetery gear shaft wear if you have been running the car with the viscous coupling locked.A straight forward conversion , if you have all the parts.:)