G series diff into a Ga70?

stevo332

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Jan 13, 2010
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I was wondering if a G series diff can be bolted into where an F series diff sits. would you have to change the axles or could you change the half shaft that go into the diff? Thanks.
 

Jeff Lange

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Mar 29, 2005
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jefflange.ca
IJ.;1494183 said:
Never heard of a GA70 having an F series thought they were all G's the same as any other A70 car?? (they do have a unique ratio 4.56:1 from memory)

Not all A70's had the G, the F was used in some GA70's, but I thought only on N/A models. As far as I know, all 1G-GTE equipped GA70's had the G-series diff.

What model do you have stevo332? I can check and see what's different between the models. :)

Jeff
 

stevo332

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Jan 13, 2010
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Thanks alot for the help so far. Basically the reason i want to run a g series diff in my supra is that my current f series diff blew the spider gears from doing burnouts, I locked it up which was ok for about 2000ks now the bearings are worn out from to much metal going through them. I've had a hard time trying to find a replacment f series diff. So my alternative could possibly be a g series if they fit.


28jf7ux.jpg


Currently running a 1jz with R154 box. I brought it with the conversion done, kinda strange since it was running an open diff. Anyway i hope you can read the details on that pic. Thanks in advance
 

stevo332

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Jan 13, 2010
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IJ.;1495831 said:
Can you get some pics of the F under your car?

I might pull it out this weekend since i need to replace my clutch anyway, if not i will take some pics of it as is. It looks pretty similar to a g series except the shafts coming out the side have 4 bolts instead of 6.
 

gofastgeorge

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Jan 24, 2008
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My Soarer had the F in it.
You would need to change the halfshafts, as they are 4-bolt, instead of the 6-bolt that the G series comes with.
Sorry, I never looked close enough at it to see if the G diff takes a different sub-frame.
Maybe Jeff could shead some light on that.
 

gofastgeorge

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Jan 24, 2008
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Just a thought......
Do you guys get the IS200 Altezza down there?
Because they come with a bullet proof F size helical, and it will go right into your housing.
A local guy here put one in his MkII, and loves it.
 

stevo332

New Member
Jan 13, 2010
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New Zealand
A couple of days ago i went to a self service car wreckers (Pick a part) for some parts for a friends car, turned out there was a supra there. Pulled the diff and the shafts out was only a g254 out of a turbo ga70. Payed 70 nzd. Got it home and it bolted up no problem.

Thanks for all the help.