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  #1  
Unread 26th September 2018, 07:23 AM
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Default SG low range swap

If you own a SG Forester and use low range you probably know it's useless. I have read a couple of threads already but can't completely understand so i'll just ask.

Can you just swap the low range gears from a 1st gen Forester (SF) into a 2nd gen Forester (SG) with no modification? And how much lower will the low range be?

I have also heard about people putting the L-Series low range into the SG Forester gearbox. Would this be as simple as just swapping it over? If it is i'd be surprised.

And, what other options are there to make the low range more like a "real" 4wd's low range?

Thanks.
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  #2  
Unread 26th September 2018, 07:50 AM
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Yes, the SF low range gears swap straight over. The earlier L series don’t apparently, and some machining is required. SF low range is 1.447 compared to 1.19. Apart from running shorter diff gears that’s about it. Alldrive are trying to develop 1.6 low range gears but are still not available
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  #3  
Unread 26th September 2018, 07:57 AM
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Quote:
Originally Posted by OneSixty View Post
If you own a SG Forester and use low range you probably know it's useless.
I disagree entirely. It's much better than no low range at all.
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  #4  
Unread 26th September 2018, 08:18 AM
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I agree Ben. Only when I began upgrading my diffs did I find the limits of the SG low range. Having said that, I still cannot figure out why Subaru went to all the expense of developing new gears which are in every way worse than what they already had
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  #5  
Unread 26th September 2018, 08:21 AM
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If you go down that path change the diffs to 4.44 and 5th to .738. The low range is then very close to a 1.6. It changes the vehicle driving dynamics in hi range as well so the torque is in a better rev range.
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  #6  
Unread 26th September 2018, 08:49 AM
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Yes, and with a turbo engine that set up means you are on boost pretty much straight away.
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  #7  
Unread 26th September 2018, 09:13 AM
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Are the 4.44 diffs and 0.738 5th from the SF Forester?
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  #8  
Unread 26th September 2018, 09:26 AM
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Not sure about the diff gears, they were on some imprezas. The 5th gear isn’t from an SF.
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  #9  
Unread 26th September 2018, 10:15 AM
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The 4.44 rear diff comes out of an auto SG or an impreza and the front comes from a single range impreza. The front crown wheel will need to have the edge milled to clear the dual range. I got the 5th gear from All Drive Subaroo.
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  #10  
Unread 26th September 2018, 10:38 AM
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Is the Auto SG rear diff still LSD?
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