Outer Limits 4x4 Board

Ok - I am asking these questions on behalf of my husband so please forgive me if I don't make sense!!

We have a '90 t/d rocky

We are looking at welding up the back diff are there any problems with doing this - (uneven tyre wear, turning problems, things wearing out quicker than they should?)

We are also looking at fitting drop shackles - apart from extended shockies is there any other mods necessary?

What gear box oil is recomended for the rockys?

And finally in 5th gear at 2000-3000rpm there is a whistling whirring sound almost like a second turbo. What is this?

And for all you slackos who didn't go to double island, we did and it was a great day. We even had the pleasure of seeing a new shape pajero running into a tree on the freshwater track. Dunno how someone can just turn towards a tree and hit it for what looked like no reason but these people did. They got out looked at the mess, got back in and kept on driving.

anyway any help from your experiences would be grateful. And I apologise again if it doesn't make any sense

Unless you drive your Rocky off road only then welding the rear diff is a very bad idea (and illegal). You'll most likely end up breaking an axle or something if you drive it a lot on bitumen like that too.

It will also affect the handling and on wet roads could be very dangerous.

Welding your diff won't grenade the center like people think if it's done properly Do a search about welding diffs there's heaps on this site

It will wear your tyres quicker but not too much worse than an auto locker from what I've seen. It will require a change in driving style because your wheels will want to turn the same speed around corners. It is illegal but so are a lot of things, you know that and the risk is up to you. Don't let people scare you off trying thought it is easy to replace the center with an open one if you really hate it, nothing ventured

I will be doing a welded rear diff on my zook in the next few weeks and my thing does see some road miles

Drop shackles mmmmmmm......

I have them and dislike them immensely. Some people like em though. Again they're illegal and far more obvious to the boys in blue than a welded diff center I have found that it's not really travel but flop you gain, no force on the ground. Hence there is heaps of wheel hop. I fell my xterrains bite.hop.bite.hop...... and it pisses me off. I've also found them unpredictable at times which is a bit unnerving when you need to know how the suspension will behave

You can get good real flex from some longer leaf springs and long shocks and it will probably wind up a good bit cheaper than a COMPLETE flop shackle package Again do a search there's heaps on this site

Michael

mj wrote: It is illegal but so are a lot of things, you know that and the risk is up to you.

It's a bit hard to hide the fact you've got a welded diff when everytime you make a turn, or negotiate a carpark, there's the screech of the tyres fighting each other! Believe me it will make lots of noise.

I have also read of people having problems with their axles breaking (or stripping splines?) from doing such mods.

murcod wrote:

mj wrote: It is illegal but so are a lot of things, you know that and the risk is up to you.

It's a bit hard to hide the fact you've got a welded diff when everytime you make a turn, or negotiate a carpark, there's the screech of the tyres fighting each other! Believe me it will make lots of noise.

I have also read of people having problems with their axles breaking (or stripping splines?) from doing such mods.

I run around with spooks with welded diffs and the ONLY time you hear tyre screech is carparks ie 90 + degree and full lock turns in VERY confined areas

I've never heard a chirp on any other piece of road

well we didn't know that it was illegal - s'pose never thought of it. How much more travel can you get out of longer shocks and leaf springs? Is there any places that can be recommended?
As for welding the diff I think it can just be left - will try and shop around at some wreckers for a lsd or locker, noone makes them for rockys anymore do they?

Rung up a transmission place today and they said to run dextron III (automatic fluid) in the gearbox as the gears won't be as nicky.
does this sound right - I'm not to sure.

If you've got shift problems when cold etc then Redline Shockproof Lightweight oil is excellent. It's not cheap (about $33 per litre) but has done wonders in my Feroza gearbox.

www.redlineoil.com
www.redlineoil.com.au

Previously I was running Dextron mixed 50:50 with Castrol VMX80 which was sort of OK but still not the best. It also made the gearbox very noisy.

murcod wrote:

mj wrote: It is illegal but so are a lot of things, you know that and the risk is up to you.

It's a bit hard to hide the fact you've got a welded diff when everytime you make a turn, or negotiate a carpark, there's the screech of the tyres fighting each other! Believe me it will make lots of noise.

I have also read of people having problems with their axles breaking (or stripping splines?) from doing such mods.

have you had a welded rear?
mine neva screeched except when i had the tires aired down to around 6psi. mine was a daily driver still is. but now have airlockers front and rear and wouldnt go back

i done one rear pinion with 31's with the welded diff but it would have done it with an airlocker 2 so no i dont think it causes anymnore brekage

drop shackles are gay

I had a look at the redline site i was amazed to see that they actually had rockys listed bravo!!! that is a first. Any way I sent an email to them for some prices. We are in the process of changing all of the oils, coolant etc (as you do with a new car as you don't know what anyone else has done!!)so it sounded so good we may just use all redline products to do so.

This thread is not helping me fight the temptation to weld both front and rear. Stop it, stop it right now!

redzook wrote:have you had a welded rear?
mine neva screeched except when i had the tires aired down to around 6psi. mine was a daily driver still is. but now have airlockers front and rear and wouldnt go back

i done one rear pinion with 31's with the welded diff but it would have done it with an airlocker 2 so no i dont think it causes anymnore brekage

I was involved with club car racing and a lot of them had welded rear diffs. The noises they used to make negotiating the pit area would put me off ever doing it- off road tyres would no doubt not be as noisy.

An airlocker is turned off when you drive on bitumen- you can't turn a welded diff off.... Therefore a welded diff is going to put a lot more strain on the diff components when driving on the bitumen!

Dangerous Dave wrote:This thread is not helping me fight the temptation to weld both front and rear. Stop it, stop it right now!

Go on Dave, I dare you to do it!

So can you fit 31's under a stock height rocky or how much lift will you need.

How do i get my pictures smaller to fit on this site? And then I can send a few pics from us at landcruiser park, although as per usual all the good shots were missed - we were to busy having fun or sh*tt'n ourselves!!

Some more reading for anyone interested in a welded rear diff:

http://www.outerlimits4x4.com/PHP_Modul ... elded+diff

http://www.outerlimits4x4.com/PHP_Modul ... elded+diff

http://www.outerlimits4x4.com/PHP_Modul ... +rear+diff

http://www.outerlimits4x4.com/PHP_Modul ... +rear+diff

http://www.outerlimits4x4.com/PHP_Modul ... +rear+diff

http://www.outerlimits4x4.com/PHP_Modul ... +rear+diff

Geez David......you're too good to these guys

Searching for them instead of telling people to CLICK HERE

Go on Dave... be Dangerous... WELD THEM UP!!!!
Then you might not get stuck in puddles out the back of Echunga!

I get the impression that David will never experience the CIG/BOC Locker in any of his cars

BUT Crowey.....I thinks you should experience it

Wadda ya got to lose

I am getting the front done fairly soon.
Just put a set of centerpedes on and i still want more grip!
Besides you can always unlock your fron hubs when you are on the road and you would never know!

Sweeet

Where 'bouts are you getting it done ?? (or are you gonna risk doing it yourself ??)

Centipedes ?? = Extreme Trekkers ?? or just the Road Tyres ??

As the guys in the Suzuki Forum reckon about welded front diffs, they drive around with one hub locked in for the light off road stuff, and when it gets gnarly, they lock the other hub.....viola....LOCKED

Got the trekkers. Only had them on the car for about 2 weeks now but the amount of difference they make is amazing!

I am friends with the guys at Cross County 4x4 here in Adelaide, so they are going to weld it up for me.

I need a lokka because i dont have much down travel in the front as it is so it gets a fair bit of wheel spin.

I got a bit hoppy coming up out of a creek and snapped the front diff last year. 2 holes in it!

Isnt saying a word.

murcod wrote:

redzook wrote:have you had a welded rear?
mine neva screeched except when i had the tires aired down to around 6psi. mine was a daily driver still is. but now have airlockers front and rear and wouldnt go back

i done one rear pinion with 31's with the welded diff but it would have done it with an airlocker 2 so no i dont think it causes anymnore brekage

I was involved with club car racing and a lot of them had welded rear diffs. The noises they used to make negotiating the pit area would put me off ever doing it- off road tyres would no doubt not be as noisy.

An airlocker is turned off when you drive on bitumen- you can't turn a welded diff off.... Therefore a welded diff is going to put a lot more strain on the diff components when driving on the bitumen!

as i said mine neva screeched around coners unless i was aireddown
so i dont care how many racecars u have been around that used to screech mine didnt

redzook wrote:as i said mine neva screeched around coners unless i was aireddown
so i dont care how many racecars u have been around that used to screech mine didnt

What size and type of tyre are you running? The larger the tyre size, the more it will flex and the less noise there should be.

BTW I don't care if your's doesn't "screech"! I like the way some people jump in and blindly recommend these mods to someone who has got no idea about the legalities, potential breakages or safety aspects. It's only fair that they know the down side as well.

Unlike Zooks, Feroza and Rocky diff centres and axles aren't a dime a dozen if something breaks, or they don't like the locked diff. Who says a Feroza rear diff assembly will handle the abuse too- they may not be as strong? Sierras being a light weight/ low powered 4WD will not put as much strain on their diffs.

Besty, when my Feroza spends 95% of it's time off road I'll be welding the diff.

murcod wrote:

redzook wrote:as i said mine neva screeched around coners unless i was aireddown
so i dont care how many racecars u have been around that used to screech mine didnt

What size and type of tyre are you running? The larger the tyre size, the more it will flex and the less noise there should be.

BTW I don't care if your's doesn't "screech"! I like the way some people jump in and blindly recommend these mods to someone who has got no idea about the legalities, potential breakages or safety aspects. It's only fair that they know the down side as well.

Unlike Zooks, Feroza and Rocky diff centres and axles aren't a dime a dozen if something breaks, or they don't like the locked diff. Who says a Feroza rear diff assembly will handle the abuse too- they may not be as strong? Sierras being a light weight/ low powered 4WD will not put as much strain on their diffs.

Besty, when my Feroza spends 95% of it's time off road I'll be welding the diff.

31" MTR's

i didnt recomend it if you read what i posted

i just put in my 2 cents wich i think is worth more then yours since you havent run a welded rear

redzook wrote:
i just put in my 2 cents wich i think is worth more then yours since you havent run a welded rear

I haven't run a welded diff because I know the effects and don't want to live with them in a daily driver. I'm not going to waste my money doing a mod like that when a replacement wrecked diff centre costs in the vicinity of $400 for a Feroza. There are other places I'd spend the money before going to that extreme.

How do people in places like NSW go with yearly roadworthy inspections and welded rear diffs?

when i had my welded rear it went through inspection twice
they didnt say a word about it cos they didnt know it was there

murcod wrote:If you've got shift problems when cold etc then Redline Shockproof Lightweight oil is excellent. It's not cheap (about $33 per litre) but has done wonders in my Feroza gearbox.

www.redlineoil.com
www.redlineoil.com.au

Previously I was running Dextron mixed 50:50 with Castrol VMX80 which was sort of OK but still not the best. It also made the gearbox very noisy.

Well,
I put in some of the redline gearbox oil tonight at a cost of $167 to do gearbox and transfer case. I took the rocky for a test drive (50kms) and the gearbox is like a new one. Well worth the money in my point of view, it is also meant to last 200 000 to 400 000kms.
Thanks for putting me on to this stuff, will probably do the rest of the car with redline products.
Its great to find people who can actually help

Glad you like it. I was very sceptical after reading all the info on it and did a lot of research before handing over my $$$. I couldn't find a single bad report on the stuff from anyone who had actually used it.

I was lucky as the Feroza box only takes 2 litres, but I'm planning on putting some in the front diff (might save it from going bang one day) and the transfer case. It's amazing stuff.

Sometimes when cold 1st gear can be hard to select, but the changes into second and third have improved out of sight on cold mornings. And it's so much smoother to change gears at any temp.

I have heard a rumor, correct me if this is wrong, but if you get your diff welded and then balanced there should be no problems with bearings etc etc and there would only be a problem if the diff was unbalanced causing uneven wear?

Dave



by the way, i've never known two people to get so fired up over a welded diff! LOL Oh and yeah, totally unrelated but i got caught speeding yesterday 66 in a 50 and now i am going to be $238 short That could have been both diffs welded or some new gearbox/transfer case oil. Ahh the price ya pay for speed.