Outer Limits 4x4 Board

Got a price for an atlas today $2750

cheap when I take off $1250 a th400 to nissan adaptor will cost me. and another $200 a nissan case would cost.

so are they any good?

suitable for speed?

any Info would be good.

cheers bru

I prefer a globe myself.

From all reports they are very good. I'm petty sure JR runs one in his awesome Bronco and that seems to handle the speed and rockcrawling pretty well. best bet would be do a search on Pirate and get some first hand reports

grimbo wrote:From all reports they are very good. I'm petty sure JR runs one in his awesome Bronco and that seems to handle the speed and rockcrawling pretty well. best bet would be do a search on Pirate and get some first hand reports

He does. As Does Shannon Campbell, The winner of KOH 08.

didn't cheezy run one in his mav.

stu wrote:didn't cheezy run one in his mav.

Thought that was a geared GQ.

Shane/Firbug Has one.
Pete A Has a few i think.
Gonads has one (shanes old Jeep, Owned by someone else)
Think 'maddog had one.

They are awesome but they are costly!

not going by the price he has got

grimbo wrote:not going by the price he has got

Depending what you want it for?

Gears/3 speed $
F&R Disconnect $
Twin Stick $
Strength $

If you just want gears they are cheaper but if you want all the above Atlas or Stak are better.

sorry I was talking about bru and his price for the Atlas

Most of the Victorian Jeep Winch Trucks run them.

Give Al Mac at Pro Comp a call, he has had a few and probably done the most and fastest work of any in Oz.

Won the OBC with an Atlas.

Have u looked at the stak? what about the lovell is its a comp buggy

jeep97tj wrote:Have u looked at the stak? what about the lovell is its a comp buggy

I don't think the lovell is really suitable - from memory it's a single speed only (no high range) and if it looses air pressure you end up in neutral.

Stak is cool and cheaper than the atlas for a 2 speed AFAIK, but it's hard to go past the atlas for repuatation.

Steve.

im wanting to put the 4 speed atlas into my truck with the t700 have looked at it for a while, but im waiting for the aussie dollar to come back up , just have to change rear diff, gearbox mount etc, from what ive read on pirate the are bomb proof, they have auto addapters you can buy off the shelf, which over come any problems

http://www.advanceadapters.com/

rob

thanks fellas.

I am awaiting reply as to if they can change it from left drop to right drop.

If so I'll grap one.

assuming toyota style flanges are just a bolt on?

cheers bru

bru21 wrote:thanks fellas.

I am awaiting reply as to if they can change it from left drop to right drop.

If so I'll grap one.

assuming toyota style flanges are just a bolt on?

cheers bru

You can get either side front drop.
Make sure you get the upgraded 32 spline front output (more $), the stock output shaft is pretty lame.
Shifters are also more $ (cable or standard)
AA do a Toyota flange for yet more money, There is also a couple third party Toyota flange setups.
Get the AA adapter and output shaft setup for your 400, it is nice and short and relatively cheap.

[edited for dsylexia]

thanks mate.

the one I have lined up is left hand drop so I will need to convert it or flip the 80 diff I have which I would rather not due to this being a high speed buggy.

I have to either take it or can the idea as with the way the us dollar is it will be 4k for a basic case, and months of waiting that will in effect delay the buggy 12 months. looking to put a soild three weeks into it over christmas so hope to sort it by then.

If there are any vendors looking at this please pm me a price for a 23 spline, th 400 atlas right hand drop.

cheers bru

The case won't care about being upside-down, all you have to do is clock it around to where you want and bolt it up. It's just that the shift rails will end up at the bottom in a constant oil bath. Might become a reliability issue, leaks and so forth.
Read up about it on Pirate, they may have been run like that before with no issues?

yeah I was looking last night and didn't come across anything. I am assuming It would just be a matter of swapping the front and rear cover plates for right hand drop to do it correctly?

I'll ring them on monday and see what they come up with.

Dont know about running the Atlas upside down - but probably harder to read. But I'd be checking beofre running one upside down as they as usually specifically built for the required drop side and I can only assume that this is for optimumal oiling etc.
Its 32 spline you want not 23
We've supplied a few now and they are a strong short box. We are currently waiting on a Monster Stak to be built for us so will be interesting to compare - but I already know it's nearly 50% heavier than the Atlas (which weighs approx 50kg) and dimensionally larger.

bru21 wrote:yeah I was looking last night and didn't come across anything. I am assuming It would just be a matter of swapping the front and rear cover plates for right hand drop to do it correctly?

I'll ring them on monday and see what they come up with.

I have an atlas and they can not be converted from left to right drop by swapping front and rear cover plates.

The same case casting is used for both left and right drop. But the machining for the input is different to the rear output. And the machining for the front output is different to the rear cover. These differences are so great it is obvious from looking at it.

It may be possible to swap the input and rear output, by re-drilling for the different bolt patterns (the spigot diameters look close, but i haven't measured).

The spigot diameter for the front output housing is larger than the bore for the rear support bearing.

It would be possible to have the case machined so the front output housing could be swapped to the other side. But a new carrier and cover would have to be made to adapt the rear bearing to the larger bore where the front housing was previously.

It doesn't look like there would be any problem, swapping the intermediate shaft/gear assembly, or the shift rails/forks around.

The holes for the oil level sight tube would need to be plugged and new holes drilled and tapped on the other side.

If the input shaft doesn't suit your gearbox, this would have to be changed as well. I had to have a new input shaft made as Atlas did not have an option to suit my gearbox.

If the uni yokes don't suit, they would have to be replaced as well.

It's do'able, but easier and probably cheaper (if the input shaft and/or uni yokes have to be changed0, to get a new Atlas with the gear ratio and other options that are best for your application.

Edit: I haven't looked for any posts on running an atlas upside down.

There could be issues with the shift levers, but probably not to much trouble (especially if cable shift). Possible oil leakage from seals on shift rails.

As far as lubrication of internals, I would expect this would be easy to correct. The main issues would be lube to the bearings, possibly involving spinning the housings through 180 deg, and making new oil grooves/drain holes in the case.

I recall there are kits to flip a D300 upside down to use in late model jeeps and as the stlas is basically D300 architecture, it should be possible, but I agree leaky shift rails could be a killer.

Steve.

Apparently not reccommended for speed events. I have not spoken to Mark first hand but received this email:


Hi Justin
>
> Thank you for your patience. I have verified with Mark his thoughts on
> your project. The Atlas in Mark's opinion is not a suitable option for
> this type of racing. He suggests using the 75 series transfer case &
> TH400. Our TH400 adaptor plate is not fitted with mounting facilities,
> we use our TH400 cast oil pan, I have attached a set of the instructions
> so you can see what it looks like. This pan also strengthens the back of
> the TH400 which is renowned for braking. You might also like to know
> that we make a tapered roller conversion for this transfer case which
> makes it ideal for your application, I've pasted the link to the info
> below. The GQ would probably give more clearance on the drive shaft but
> it's chain drive which makes if weaker. Our TH400 sump is scalloped at
> the side to help get drive shaft clearance
>
> http://www.marks4wd.com/products/split- ... ersion.htm
>
> Hope this information has assisted you
>
> Please don't hesitate to contact me if you need any further assistance
> or information
>
> Kind Regards
> Denny
>
> Justin wrote:
>>
>> Hi,
>>
>> I have just spoken on the phone regarding the atlas transfer case.
>>
>> I am building a 4x4 off-road race buggy, that will also be road
>> registered as an ICV.
>>
>> I have a LS2 v8 mated to a th400 gearbox.
>>
>> This will be used for Finke, Aust safari and Cliffhanger style events.
>>
>> Is the atlas suitable for high speed use - 160kph + ???
>>
>> I require the transfer to be drivers side front output, mate to the
>> t400 and I have a preference for Toyota style drive shaft flanges, no
>> speedo output required (short shaft preferred).
>>
>> If this can be done for a good price I would prefer this option.
>>
>> If not I will look at fitting a 75 series or GQ patrol transfercase.
>>
>> Is there enough meat left around the gearbox mounting holes to enable
>> them to be drilled myself at my preferred clocking angle as I am
>> trying to keep the base of the buggy flat.
>> Can this adaptor be purchased without the gearbox mounting holes?
>>
>> Would the 75 or the GQ transfer allow greater clearance between the
>> front driveshaft and th400 pan.