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At last, some solid
information, specifications & facts on the JZA80 Supra rear
differential.
All information on this page
refers to the JDM JZA80, export Turbo JZA80's with the 6 speed ran the B
series differential with a 3.133 ratio.
All VVTi JZA80's ran an A series
differential, including the 6 speed Turbo from the factory - it was
never offered with a B series.
There are 2 differential
sizes in the JZA80, the most common is the A series which runs a 200mm
crown wheel which was found in the 2JZ-GE manual and automatic as well
as the 2JZ-GTE automatic and in the manual 2JZ-GTE from 5/96 up until
7/02 when the JZA80 was no longer produced. The following ratios are
available for the A series diff - 3.266, 3.769 & 4.083.
Then there is the B series
which runs a 220mm crown wheel. It was found in the 6 speed 2JZ-GTE from
5/93 up until the 5/96 where it was discontinued and replaced with the
smaller A series. There was only ever 2 ratios offered on the B series
diff - Export JZA80's received the 3.133 whilst the JDM ran a slightly
shorter 3.266 ratio.
Both of the A & B series run
a Type 1 Torsen differential up until the 5/96 when the Type 2 Torsen was
introduced. Information, specifications can be found in the following
Technical documents from Zexel Torsen.
Torsen Type-1 Technical Sheet
Torsen Type-2 Technical Sheet
Torsen Performance Technical Sheet
Torsen LSD - Traction Control
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