Gears
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Driver School Candidate
Joined: Sep 2018
Posts: 37
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From: TX
Gears
Does anyone make replacement rear gears or ever changed them? I was thinking this would be a good mod but all of my experience is with mustangs and camaros. I have not found any replacements or seen anybody post about changing them. Thanks for any info you can provide.
Lexus Champion
Joined: Oct 2005
Posts: 10,336
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From: Calgary, AB
On ISFs they swap the IS350 differential into their ISFs (numerically higher/shorter), but heard mixed opinions on it. It increases low gear acceleration at the cost of high speed acceleration and reduces top speed.
RCF essentially revs much higher, but has the same identical ratios designed for the ISF so for RCF, it is more optimized for higher speed race track or roads like Nurburgring or Autobahn etc.
RCF essentially revs much higher, but has the same identical ratios designed for the ISF so for RCF, it is more optimized for higher speed race track or roads like Nurburgring or Autobahn etc.
Last edited by 05RollaXRS; Sep 25, 2018 at 07:36 PM.
Lexus Champion
Joined: Oct 2005
Posts: 10,336
Likes: 2,730
From: Calgary, AB
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That may be a very good compromise ratio on top speed vs launch.
Anybody have a part number? I’m assuming a bolt in conversion.
This is very interesting!!!
now I have to do some research!
Anybody have a part number? I’m assuming a bolt in conversion.
This is very interesting!!!
now I have to do some research!
Pole Position
Joined: May 2017
Posts: 302
Likes: 63
From: PA
agreed, it feels slower off the line and in some gears (3rd I think) because they are so long. Shorter would torpedo the mpg though which may be one reason Lexus avoided it. Not that many here will care about mpg. THey had to make a v8 car that could live in a CAFE world.
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