Home brew duals adapter

[Turoa]

I thought I might stick up a little post about what ive been up to over the last week. It started off with buying a gbox and transfer off the net for $20 8) ....

Then I got the idea of dual transfers. Since I dont have any money I couldn't buy one, and since I have access to a great workshop, I decided to make one instead

First off we start with the housing that goes between the Gbox and transfercase. The idea was to remove the flange and then mill it down flat. So out came the 9" and the mill





After milling it flat I started work on the output shaft.

This is the standard output shaft



Then I cut it where it steps down next to where the circlip is to hold the bearing on it





And then stuck it in the lathe and bored out the inside of it. I bored it to 34mm



And then I took the standard coupler that goes between the gbox and xfer. This gets turned down to a press fit inside the outputshaft (I turned a little extra by accident, but it doesn't matter too much). Not shown in the chamfer I put in to assist penetration whilst welding.







Here they are next to eachother



Next up it was time to start work on the 2nd flange used in my adapter. It is cut from the rear housing of the xfer and bolts on to the back of them.

I used the same technique of cutting with the 9" and then milling flat (you cannot mill the whole thing flat though). Remember first though to cut off the front output part (I used the plasma).







Next up I welded up the output shaft. I wanted to plug weld it but there was no way a drill bit was going through that hardened steel, so I used a 3mm cutting disc and cut 2 slots about 1" long each and welded through, and then turned it back down so the bearing and gears can pass over the top.

The bearing surface needs to be completely flat. Also at this stage harden to your liking.







Next up it was time to start measuring. I ended up cutting a tad off the coupler to get it a bit shorter. Note it is possible to get it much shorter than I have done, but I have decided to leave it the length I have for a few reasons I won't go into. I ended up using some 50x6mm strap between the 2 flanges.



Then I stood it on its nose and used various bits of 50mm strap around it and tacked some bits in place.





And then started filling in the gaps with more



This is rough guide on how I have done my duals adapter. Its not pretty but it works well and it was cheap. I thought it was a damn good bit of engineering for a 17year old

There are no finished pics yet as it is away getting welded (I am not competent enough on a tig to do more than tack). I did forget to mention though that I clocked it 10deg at the same time.

Let me know what you think

[bj on roids]

To make it look better could you have left a bit of the housing on one end of your adapter (instead of using the 50x6 flat bar?)

Then you only have to Tig around one side.

I like it though...

[Harb]

Really like people having a go and making stuff themselves, good stuff

[v840]

Fawk you for having access to a mill and lathe and tig and...........I pretty much just hate you.





Good job on the adapter though. Looks the goods.

[locktup4x4]

Very Nice .

Jason

[TWISTY]

for thinking outside of the box and making it yourself!!!!

[RED60]

A couple of things to think about.

1. be careful when setting gears up in any chuck. It is possible for the teeth to to put you off centre if they don't sit properly in the jaws.

2. for accurate work 4 jaw chucks are better, I know they're a pain to set up but they are more accurate than 3 jaw, especially if you have to take the job out, do something, then place it back in the chuck.

3. if you stagered the welded cuts they MAY be a bit stronger.

This is not to criticise your work, just something to think about. As someone else said, good on you for havin' a go...

[Z()LTAN]

awsome mate.

I can see you becoming a new marks or marlins.

Keep on keeping on !

[Turoa]

Cheers for all the compliments guys. I enjoy engineering stuff. Its the mechanical side of 4x4's I hate.

To make it look better could you have left a bit of the housing on one end of your adapter (instead of using the 50x6 flat bar?)

Then you only have to Tig around one side.

Yep i did look into that but by the time I shopped out enough to make way for the bolt holes there ended up not being much left of the original case so I opted to just mill them flat.

A couple of things to think about.

1. be careful when setting gears up in any chuck. It is possible for the teeth to to put you off centre if they don't sit properly in the jaws.

2. for accurate work 4 jaw chucks are better, I know they're a pain to set up but they are more accurate than 3 jaw, especially if you have to take the job out, do something, then place it back in the chuck.

3. if you stagered the welded cuts they MAY be a bit stronger.

This is not to criticise your work, just something to think about. As someone else said, good on you for havin' a go... Cool Cool

Yep I was wary of the teeth putting it out of whack, but I beleived it to be close enough (is going in a bush truck after all). Next time I probably will do it in the 4 jaw though just to be more accurate.

Cheers for the criticism though. Its the only way we learn

[bj on roids]

Send it over to me I will tell you if its any good or not.

[v8zuki]

i too can also help with testing
top job

[stock 4runner]

hey mate how did you go with this? did it work as you thought?