Quote:
Originally Posted by Shadowman
Okay, who wants to sell their 4.10's? I'm not ready to make the 4.56 jump yet.
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If you;ve got a 6-speed, I can rationalize the 4.10 versus 4.56 for some situations. But, if you have the automatic, my computer modeling at the time I first proposed this "radical" idea of 4.56 gears to this SSR community, showed that the impact of the 4.56 on acceleration was so much greater than that of the 4.10 as to make the 4.10 a questionable choice.
Since the swap is not cheap ($600 to $900 in most markets, for parts and QUALIFIED labor), it does not make sense to do it twice.
The 4.56 gets an automatic up to only 2198 rpm at 60 mph in top gear, and imapcts fuel mielage very modestly. It makes the vehicle REALLY wake up.
To review reasons I have previosuly published as to why 4.56 is so good for an SSR:
1. The SSR has very large diameter tires - over 29" - much larger than on typical cars, so 4.56 on an SSR is like maybe a 3.3 or 3.5 on a Corvette or Mustang
2. The SSR is VERY heavy - MUCH heavier than almost any car and certainly far heavier than any performance car except maybe an original (large body)Impala SS. This very adversely affects acceleration, AND loads both the engine and the transmission very significantly at low rpm.
I think I have surely mentoned in earlier older posts that the computer modeling shows that the 4.56 gearing reduces 0 to 60 mph times, with a typical driver weight and half tank of fuel, by 3/4 second to 1 second. That's HUGE in terms of seat of the pants feel.
Jim G
p.s. I would not recommend using anyone else's used 4.10 gears. The odds are that they would never be as quiet as they should be, as rear end gears must be precisely installed and they wear ratherr specifically once installed.
