Front Diff Disassembly

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Front Diff Disassembly

Postby BADNEWS » Mon Jan 13, 2014 9:56 pm

So for fun I took apart my front diff from my blown center diff assembly.

Here is a video of me taking it apart:

http://youtu.be/r30jkSc_CBA


Here are some photos of it:
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90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
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BADNEWS
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Re: Front Diff Disassembly

Postby BADNEWS » Mon Jan 13, 2014 10:01 pm

To compare the pinion/spider gears I measure the shafts of the front diff vs the center diff. I didn't have any good spider/pinion gears left from my center diff to do a comparison photo of them side by side.

Center diff shafts:
Image

Front diff shafts:
Image
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
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Re: Front Diff Disassembly

Postby CMS-GT4 » Tue Jan 14, 2014 1:32 am

So does the center diff rely on the front diff to maintain its position and fit inside the transfer? In other words can one exist in the transfer without the other?
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: Front Diff Disassembly

Postby BADNEWS » Tue Jan 14, 2014 1:46 am

They are both in the spot where a normal diff in a FWD trans goes. Not in the transfer case. Only the Viscous Coupling, and the transfer gears (ring and pinion) are in the transfer case.

But yes you need both the center and the front together for this unit to work. The Front Diff spins freely inside of the Center Diff housing.

You can see on that machined into the front diff housing is the center diff side gear. Obviously this is the side gear for the front wheels. The other side gear (Not photoed) is for the rear wheels. Also the spline in the middle is for the Viscous Coupling to be hooked up to the front wheel side of the center diff.

Image
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
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BADNEWS
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Posts: 671
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Location: Milwaukee, WI

Re: Front Diff Disassembly

Postby CMS-GT4 » Tue Jan 14, 2014 1:52 am

Alright thanks. I was curious in respect of welding the center diff for rwd and dumping the front diff to save weight.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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CMS-GT4
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Re: Front Diff Disassembly

Postby BADNEWS » Tue Jan 14, 2014 2:01 am

CMS-GT4 wrote:Alright thanks. I was curious in respect of welding the center diff for rwd and dumping the front diff to save weight.


You could get away with doing that. You would just weld the rear wheel center diff side gear to the center diff housing. Then you can get rid of the VC and the front diff.

http://youtu.be/UWXdrpdJA6U?t=28s


At the 0:28 point in the video I start to spin the side gear of the center diff that is for the rear wheels. You would just have to weld it to the housing like this.

Image
90 ST185 W/ HTZ4094R (6768), 2.2, Fully Built
865AWHP, 591 torque
Hope to have some 1/4 times this summer of 2016!!!
User avatar
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Posts: 671
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Location: Milwaukee, WI

Re: Front Diff Disassembly

Postby CMS-GT4 » Tue Jan 14, 2014 11:13 am

That is what I was wondering. There had been a few rwd conversion claims, but none explained how they did it with the stock gearbox. I always said, its sort of pointless of converting the awd tranny to rwd due to dragging around all the extra weight. Kind of counter productive to the performance gains. I would Imagine if one could drop some of that transfer weight, and then weld some covers on the axle holes, then one might have a fun little thing to do to an extra gear box as an experiment.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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CMS-GT4
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1992 Toyota Celica


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