Outer Limits 4x4 Board

ive got a spare tranny sitten at work and was wondering if it was
possible to split and have dual transfer case
do i take it to specialist gearbox mecho or 4x4 shop

how similar would it be to the procedure for other makes

who has done it to their truck?

im intersted in nowing if its possible or wether to sell it

cheers Lucas

it would be custom job. Not aware of anyone doing it. The Haultech guys may, I repeat MAY, be in a position to customise the joining, but it wouldnt be cheap

I have given this a thought for myself a while ago , since the F20's drivetrain is basically the same as the Rocky's, and after some research I think it would be a real pain in the arse to mate the two trannies, for a couple of reasons:

First, the propshaft is driven by the secondary shaft of the transfer, which is off centre. This means that you'll havo to mate the sec. shaft of the first trannsfer to the primary of the second, which one is centered.

Second, if you manage to do this , you'll end up with a high range gearing whichs is multiplied. Normally the high range ratio is about 1:1.3, which with a dual tranny setup will result in a ratio of 1:1.69. This comes close to the feroza's low range..... You'll have to run really big rubber to make it driveable on road.....
Third, drive shaft angle, lenght and phasing definitely will be huge problems as the output of the tranny will be more off centered than before

I think the easiest way to get some lower gearing is get some new gears made, althouhg there isn't much spaci in the transfercasing left.

Having said that, dual transfer setups still seem ideal to me, and i'm still thinking of it, haven't found out how to do it yet. Gives me an crawl ratio oof 1:103, pretty awesome me thinks!!

elgordomuygrande wrote:
First, the propshaft is driven by the secondary shaft of the transfer, which is off centre. This means that you'll havo to mate the sec. shaft of the first trannsfer to the primary of the second, which one is centered.

drive shaft angle, lenght and phasing definitely will be huge problems as the output of the tranny will be more off centered than before

the first tranny will be off center so where the second one would bring
it back to the middle, wouldnt it
in a hilux the second sits in line with the 1st?

hadnt thought about the space it'd take up...
just have to compensate by pushing diff back couple o inches


how do i get new gearing made? who does it?

Hey Lucas,

Spartacus wrote:in a hilux the second sits in line with the 1st?

hilux' second is inline with the primary. Highrange they're locked, just like 4th in the gearbox. In this configuration you "simply" put the output (s) of the first into the input (p) from the second. All shafts are inline so its easy to connect it to the diffs. You only need the 4x4 system of the second, so get rid of the first (cut and grind the housing and close it with a plate or something) .

check this one
http://www.marlincrawler.com

Spartacus wrote:the first tranny will be off center so where the second one would bring
it back to the middle, wouldnt it

That wouldn't be practical, because you'll have to use the output from the last one for both front and rear drive. turning the second will leave the front output to interfere with the housing...... still got it...?? Can send you a pic from the service manual, piccies say more than words

Spartacus wrote:how do i get new gearing made? who does it?

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You can design your gears yourself , If you have the engineering skills and let a local machineshop do the fabricating. Or you get the old gearset out en tell them what tou want, a decent shop should be able to tell you what's possible or not. flipside is that these custom mods probably don't come cheap...