LX RTS S & SL
Rim 13x4.5" Offset +0.75" ( 19 mm ) PCD 5x4.25" Stud 7/16" UNF Source:
Unconfirmed
Tyre 175SR13 (Approximate metric equivalent is 175/70/13) Source: LX Torana
owners manual
Track Front 54.9" (1394 mm) Source: LX Torana owners manual
Track Rear 54.0" (1372 mm) Source: LX Torana owners manual
In theory the diff width including brake drums should be 1372 mm + ( 19 mm x 2 ) = 1410 mm.
I think the track figure is wrong as the diff width should be the same across
the LX range with the exception of the A9X option)
LX RTS SL/R & SS
Rim 13x5.5" Offset +1.25" ( 32 mm ) PCD 5x4.25" Stud 7/16" UNF Source:
Unconfirmed
Tyre CR70H13 (Approximate metric equivalent is 200/70/13). Source: Unconfirmed
Track Front 55.3" (1405 mm) Source: LX Torana owners manual
Track Rear 54.4" (1382 mm) Source: LX Torana owners manual
In theory the diff width including brake drums should be 1382 mm + ( 31.8 mm x 2 ) = 1445.6 mm.
My LX diff measured 1446 without brake drums. It would appear this track figure
is correct.
L34
Rim 14x6" Offset -0.25" ( 6.37 mm ) PCD 5x4.75" Stud 7/16" UNF Source:
Unconfirmed
DR70H14 (Approximate metric equivalent is 205/70/14) Source: Unconfirmed
Track Front 57.89" (1470.4 mm) Source: "Holden Torana Performance Handbook" by
Eric Blair 1993 p 64 and 65.
Track Rear 56.82" (1443.2 mm) Source: "Holden Torana Performance Handbook" by
Eric Blair 1993 p 64 and 65.
In theory the diff width including brake drums should be 1443.2 mm + ( -6.37 mm x 2
) = 1430.46 mm.
L34/A9X
Rim 14x6" Offset -0.25" ( 6.37 mm ) PCD 5x4.75" Stud 7/16" UNF Source:
Unconfirmed
DR70H14 (Approximate metric equivalent is 205/70/14) Source: Unconfirmed
Track Front 57.2" (1452.88 mm) Source: "45 Years of Holden" Terry Bebbington and
Michael Malik 1994 p 93 and 96.
Track Rear 56.1" (1424.94 mm) Source: "45 Years of Holden" Terry Bebbington and
Michael Malik 1994 p 93 and 96.
In theory the diff width including brake drums should be 1424.94 mm + ( -6.37 mm
x 2 ) = 1412.2 mm
A9X Hatch & Sedan
Rim 14x6" Offset -0.25" ( 6.37 mm ) PCD 5x4.75" Stud 7/16" UNF Source:
Unconfirmed
DR70H14 (Approximate metric equivalent is 205/70/14) Source: Unconfirmed
Track Front 59.5" (1485.9 mm) Source: Just Holdens Toranas collectors series.
A9X edition pg 23
Track Rear 57.1" (1450.3 mm) Source: Just Holdens Toranas collectors series. A9X
edition pg 23
In theory the diff width including brake drums should be 1450.3 mm + ( -6.37 mm x 2 ) = 1437.56 mm
Three different sources give three different track widths. The offset figures
are probably wrong.
Diff Housing
The LH parts and LX parts manuals list the following housings.
Housing Assy - 2.78:1, 3.08:1 A.R. 6 cyl Eng 2819067
Housing Assy - 2.78:1, 3.08:1 A.R.
4.2 Litre Eng 2819067
Housing Assy - 3.36:1, 3.55:1 A.R. 6 cyl Eng
2819068
Housing Assy - 3.36:1, 3.55:1, 3.90 A.R. 4 cyl Eng
2819068
Housing Assy - 2.78:1, 3.08:1 A.R.
5 Litre Eng exc L34 Eng. 2825743
Housing Assy L34 Eng 9935109
Housing Assy
A9X option 92002517
Track
Wheel track is measured from the centre of the tyres. Wheel track will vary on
the front suspension depending on ride height as the control arms swing in an
arc. To maintain track all you have to do is maintain the standard offset
regardless of the rim width.
Backspace
The trick to backspace is that the rim width is measured from the inboard tyre
bead seat to the outboard tyre bead seat. Backspace is measured from the inboard
flange to the hub. There is typically 0.5" of flange beyond the tyre bead seat.
If you measure an 8" wide rim from flange to flange it will measure 9.0". If you
measure from the inboard tyre bead seat to the outboard tyre bead seat it will
measure 8.0".
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