Toyota A series differentials (~1995 onwards) ratios? can i use G series crown/pinion

[Sciflyer]

Wait a minute

the 'B' diff in a JZX i would suggest is entirely different to the B diff in the 6-speed JZA80!

Makes no sense at all.....

Funny that the thread that pic came from is here http://toymods.net/forums/showthread.php?t=2152

and its basically the same discussion that keeps coming up.... the older diff codes are well documented, but from the '90s on its just mass-confusion...

[whatthe?]

And just to add further complication....

http://www.toymods.net/forums/showpo...1&postcount=42

[ed]

And just to add further complication....

http://www.toymods.net/forums/showpo...1&postcount=42

not saying we want to swap the whole centre over (just as some f series centres dont swap over years) but that the crown/pinion dia/shoulder/pcd/splines can be interchanged

[Sciflyer]

Im going to make up a spreadsheet... really needs to be done.

edit: yeah looks like a case of suck it and see unfortunately

[whatthe?]

not saying we want to swap the whole centre over (just as some f series centres dont swap over years) but that the crown/pinion dia/shoulder/pcd/splines can be interchanged

Ah, gotcha. Be worth trying to find a top view pic then to make sure the PCDs look the same

If the centres are so different I'd be a little worried...

[ed]

heres my current take on the situation:

FIRST LETTER
A = 200mm crown wheel
B = 220mm crown wheel

SECOND NUMBER
01 = 4.083 ratio
02 = 3.769 ratio
03 = 3.266 ratio

THIRD LETTER
A = 2 pinion open
B = 2 pinion torsen
C = 4 pinion open
D = 4 pinion torsen

so.... (and feel free to clarify/expand with confirmed plate code data)

A01A - 2jzge manual jza80 supra

A01B - 1uzfe auto uzz30 soarer

A02B - 2jzgte auto jza80 supra

A03B - 2jzgte manual jza80 supra (>96.5)

B03B - 2jzgte manual jza80 supra (93.5-96.5)

[whatthe?]

Not necessarily



7.5" F series

I got a TRD centre for this which shared the same part number for MA61 also

[ed]

is200?
thats an f series yes? ie 7.5"

edit after your edit - well thats well fucked then isnt it!!??!!
wtf is toyota doing? this is impossible

suck it and see it is!!

[Draven]

IS200/300 have a smaller A-series than the JZA80 a-series, afaik.

[Sciflyer]

Yeah its really messed up Ed, for example

A01A in a Supra is 4.08:1

A01A in a Soarer is 3.92:1

The IS200/300 use the same diffs as the JZX100, which are either A or B, but completely different A or B from the Supra/Soarer....

Luv yer werk Toyota!

[whatthe?]

IS200/300 have a smaller A-series than the JZA80 a-series, afaik.

I thought when you checked the IS300 was a B series? I believe IS300 diff has an 8" crown (rumoured to be G compatible)

edit - yep, B series
http://www.toymods.net/forums/showpo...4&postcount=10

[Sciflyer]

Altezza Gita (IS wagon)

4.3:1

[ed]

fuck this - give me some G series gears and a rogered A series jza80 supra diff

[ed]

A01A in a Supra is 4.08:1
A01A in a Soarer is 3.92:1

i actually think thats incorrect
the supra and the soarer are basically the same vehicle
they share basically all driveline parts, with interchangable part numbers

it would be more likely that some internet garble has produced a mistruth than that above statement actually being true

i have a A01B from a uzz30 soarer in the supra. the road speed im getting out of it at present (with definitive 6500 rev cut) supports paper data for 4.08:1 ratio. the data for my diff being an 3.92:1 ratio just doesn't correlate

[Sciflyer]

One of mine



a 32 with Torsen



All V8s had the 3.92:1 ratio, the common swap is to put in the TT Soarer/ n/a Supra 4.08 to wake them up a bit