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worth shaving 40 series diff? YES! - build pics

General Tech Talk

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worth shaving 40 series diff? YES! - build pics

Post by Baja Burley »

Putting 40s diffs under the lux and dont wanna lose too much of that awesome diff clearance from a lux,,

How much can be taken out of the bottom of a Toyota 40/60/80 Rear Diff??
Last edited by Baja Burley on Sun Apr 21, 2013 7:29 pm, edited 2 times in total.
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Re: worth shaving 40 series diff

Post by V.W.Dave »

15mm is what I have taken out of a 80 but it still has a few mm clearance.
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Re: worth shaving 40 series diff

Post by SierraDan »

15mm is 15mm you didn't have before.
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Re: worth shaving 40 series diff

Post by Baja Burley »

That's exactly right. A shaved diff on 37" has the same clearance as a normal diff running 38.5"

I just wanted to know how much
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Re: worth shaving 40 series diff

Post by SierraDan »

Also can create a better surface to drag over shit when it does hit even if you dont gain heaps of clearance.
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Re: worth shaving 40 series diff

Post by Struth »

You can probably take about 20 to 25mm off a 40 diff, well worth the effort.
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Re: worth shaving 40 series diff

Post by Baja Burley »

Can anyone link me to a thread with pics of the process? I want to know how much to cut out to start with?
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Re: worth shaving 40 series diff

Post by brad 93hilux »

There is pics of me doing my hilux one in my build up thread

Brad
3.0L turbo diesel, 4" lift, bud's front housing, track assasin cv's, air lokker front + Rear, beadlock'd 37 stickies, high steer, 15.5" travel ranchos, high pinion diff and coils on the rear
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Re: worth shaving 40 series diff

Post by SierraDan »

I cut a small hole in the bottom, so i could see how far away the crown wheel was.
Then gradually cut away and put some 6mm on top to see my clearance till i was happy.
I also cut across the front, not just the bottom..

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Re: worth shaving 40 series diff

Post by Baja Burley »

Awesome tech dude. Cheers for that.

What sort of clearance should I be aiming for? Obviously the less the better but what the minimum?
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Re: worth shaving 40 series diff

Post by Baja Burley »

I see you've cut and rewelded the diff cover as well.

Can this be done in a 40s and just rotate the carrier in the housing to make a high pinion? Or would that spin the wheels backwards?

Edit: I'm drunk... Of course it would
Last edited by Baja Burley on Tue Apr 16, 2013 11:58 pm, edited 1 time in total.
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Re: worth shaving 40 series diff

Post by 80's_delirious »

SierraDan wrote: Image
Goddamm!they are farken huge rims! Or its a puny Zook diff! :finger: looks funny as! :D
RN wrote:pussy is out, its the log for me... Thank you Jesus.
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Re: worth shaving 40 series diff

Post by SierraDan »

15x8 :lol:
Its a Vitara centre. Nearly Hilux size haha.
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Re: worth shaving 40 series diff

Post by Baja Burley »

After tearing down the 40 diff tonight I can confirm the clearance between stock housing and ring is 20mm.
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Re: worth shaving 40 series diff

Post by SierraDan »

Toy 8" housing
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Re: worth shaving 40 series diff

Post by Baja Burley »

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With the pinion pointed around 15* I picked up approx 20mm. Which I'm happy with. The inside rib/spine is to ensure the bottom surface doesn't deflect AT ALL. It's built with about 1mm clearance so it really has no room to move.
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Re: worth shaving 40 series diff? YES! - build pics

Post by AFeral »

Like the rib-spine, should stop any unwanted bending
Anything is possible, it just comes down to time and money.
Ferals build www.outerlimits4x4.com/ftopic164570.php
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Re: worth shaving 40 series diff? YES! - build pics

Post by SierraDan »

Nice! Good work. I like the spine idea. Are you going to/did you weld up the inside too?
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Re: worth shaving 40 series diff? YES! - build pics

Post by Baja Burley »

Haven't welded the inside yet. I got a bit sick of working on it and went wheeling! I should get round to it
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