View Full Version : How common are disc brake rear ends on GJ Sigma's?
29-05-02, 05:42 PM
As topic says, how common are disc brakes on the rear of GJ Sigma's? Thats 1983ish models.
Also does anyone know what diff ratio's they run? And are the 2.6's and 2.0L diffs and ratio's the same?
29-05-02, 09:23 PM
1.6 - 3.7:1 or 3.98:1
2.0 manual - 3.42:1 or 3.23:1
2.0 auto - 3.23:1
2.6 - 3.42:1
AFAIK disk brakes are fairly common on GJ 2.6's
30-05-02, 12:08 AM
GJ Sigma's ran from 1981 to 1983, and I owned two of them both secondhand.
In both of these cars, I had 4-wheel discs, and no car I've ever owned has had drum brakes. The GJ's I had were made in 1982, of which one was a 2.6L 5-sp, the other was a 2.0L auto. So I can only hazard a guess that from the GJ era onward, disc brakes were used, except if they were optional, which may have been the case back in those days. If this is so, then it looks like I got lucky. :)
The 1.6L version is the Saturn engine, and the 2.0L & 2.6L versions are Astrons.
As for diff ratio's, I really couldn't say, but I hear the 3.42:1 was very popular as it's right in the centre of the range; not too much acceleration, not too much power (which is the problem with a stock siggy). Hence the reason they're so popular for modifications - they're easy to upgrade, but parts are getting harder to find and more expensive for the enthusiast that likes every last detail to count.
30-05-02, 05:48 PM
Hmmm, whats the chances of getting one of the 3.98:1 ratios?:D
Would all the centres be interchangable?
I have 2 GJ's at the moment, a 2L auto sedan and a 2.6 manual wagon. Both have rear discs. Just wondering if it was normal.
30-05-02, 11:46 PM
Well you'd think the centres would be interchangeable - Scorpion owners change them over for other ratios, eg. exchanging manual diffs for auto's, better cruisability (less RPM @ 100km/h), yada yada...
I'm not too sure about changing out the 3.98:1 diff centre though - good idea. :p
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