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Author Topic: can a itr lsd diff be modded to fit a ls?  (Read 5518 times)

highroller54

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can a itr lsd diff be modded to fit a ls?
« on: September 06, 2010, 04:26:07 PM »

I've never had one side by side, I know you can swap final drives but I need the stock ls gear ratios so thats out. Any other ideas other then just getting a m-factory lsd?
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turbohf

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #1 on: September 06, 2010, 05:51:47 PM »

use a B16A LSD...
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crxwolski

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #2 on: September 06, 2010, 05:52:13 PM »

I was told from m-factory that a b16 diff lsd will fit LS trans. You will need to shave some of the trans case.

highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #3 on: September 06, 2010, 05:54:27 PM »

really? I was told the b16a factory lsd had a different bolt pattern then the regular open b16 diff.
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snm95ls

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #4 on: September 06, 2010, 07:07:05 PM »

It will work just fine if you use a GSR final drive set.

 :P

The bolt pattern for the ring gear is the main thing that keeps the ITR LSD from working with an LS transmission.  The GSR/ITR use a larger bolt pattern ring gear than B16/B17/LS ring gear.

highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #5 on: September 06, 2010, 07:22:03 PM »

yes, the itr has a 116.8mm whole in the gear and the ls is 109mm. Can a guy machine down a itr diff and redrill the bolt pattern? Is the flange were the ring gear sits the same hight?
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crttaz

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #6 on: September 06, 2010, 10:16:01 PM »

use GSR FD and CS with LS gears????

only 3% difference

7000 rpms with LS FD = 7200 rpms with GSR FD......
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crttaz

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #7 on: September 06, 2010, 10:20:53 PM »

B16/B17 has 130mm bolt pattern and 110mm crown opening

http://www.quaife.co.uk/sites/default/files/drawings/QDF1U.pdf

GSR/ITR has 138mm bolt pattern and 117mm crown opening

http://www.quaife.co.uk/sites/default/files/drawings/QDF6U.pdf

Kiwi at GearX was telling me they had tried making the ring gears with 117mm crorn opening and dual bolt patterns without issues.
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #8 on: September 06, 2010, 10:22:05 PM »

I have thought of that but I'm already under geared for what I want. Supposedly a y1 jdm lsd diff fits, but from what I hear they are one piece (cant take off the ring gear??) and that could be tough to find.
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crttaz

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #9 on: September 06, 2010, 10:22:41 PM »

I have thought of that but I'm already under geared for what I want. Supposedly a y1 jdm lsd diff fits, but from what I hear they are one piece (cant take off the ring gear??) and that could be tough to find.

Quaife/MFactory/OBX.....ITR diffs are weak anyways.
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #10 on: September 06, 2010, 10:23:13 PM »

B16/B17 has 130mm bolt pattern and 110mm crown opening

http://www.quaife.co.uk/sites/default/files/drawings/QDF1U.pdf

GSR/ITR has 138mm bolt pattern and 117mm crown opening

http://www.quaife.co.uk/sites/default/files/drawings/QDF6U.pdf

Kiwi at GearX was telling me they had tried making the ring gears with 117mm crorn opening and dual bolt patterns without issues.

good info!  :yes:
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #11 on: September 06, 2010, 10:24:36 PM »

I have thought of that but I'm already under geared for what I want. Supposedly a y1 jdm lsd diff fits, but from what I hear they are one piece (cant take off the ring gear??) and that could be tough to find.

Quaife/MFactory/OBX.....ITR diffs are weak anyways.

yes but there is no way this build will break it, lol.  I was trying to be cheap as I dont need to pay for the overkill on parts
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crttaz

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #12 on: September 06, 2010, 10:26:28 PM »

I have thought of that but I'm already under geared for what I want. Supposedly a y1 jdm lsd diff fits, but from what I hear they are one piece (cant take off the ring gear??) and that could be tough to find.

Quaife/MFactory/OBX.....ITR diffs are weak anyways.

yes but there is no way this build will break it, lol.  I was trying to be cheap as I dont need to pay for the overkill on parts

Like using LS rods in a D16 when after the costs they end uo costing more that the cheap H beams.

Stock ITR power can break the ITR LSD.....

Quit being a broke dick :)
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #13 on: September 06, 2010, 10:30:29 PM »

lol, yes you are right. I think a mfactory will be on the list. The price of this piece of shit car is really adding up quick  :?:
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crttaz

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #14 on: September 06, 2010, 10:35:15 PM »

Why I stayed SOHC.....I'm a brokedick :)
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #15 on: September 06, 2010, 10:37:55 PM »

Why I stayed SOHC.....I'm a brokedick :)

They fit into my chassis too easy, what fun is that? lol.
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dvst8r

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #16 on: September 06, 2010, 10:39:04 PM »

Why I stayed SOHC.....I'm a brokedick :)

They fit into my chassis too easy, what fun is that? lol.

And with a cheap holset make more power...  :-*
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highroller54

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #17 on: September 06, 2010, 10:48:33 PM »

Why I stayed SOHC.....I'm a brokedick :)

They fit into my chassis too easy, what fun is that? lol.

And with a cheap holset make more power...  :-*

fuck a t25 would make moar power  :P
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turbohf

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Re: can a itr lsd diff be modded to fit a ls?
« Reply #18 on: September 07, 2010, 01:15:51 PM »

I have thought of that but I'm already under geared for what I want. Supposedly a y1 jdm lsd diff fits, but from what I hear they are one piece (cant take off the ring gear??) and that could be tough to find.

Quaife/MFactory/OBX.....ITR diffs are weak anyways.

yes but there is no way this build will break it, lol.  I was trying to be cheap as I dont need to pay for the overkill on parts

Like using LS rods in a D16 when after the costs they end uo costing more that the cheap H beams.

Stock ITR power can break the ITR LSD.....

Quit being a broke dick :)

i havent broken mine yet.... :-\
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Dustin  :Jew:
1987 Buick Regal Limited 6.0L/4L80E (LQ4, 862 heads, tbss intake, 92mm tb, e1841p cam, Holley EFI)
2000 Silverado LS 5.3L Reg Cab Short Bed
1966 Chevy II Nova 400 4dr Sedan V8


'Faster, Faster, until the thrill of speed overcomes the fear of death.'
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