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Old 08-11-2014, 10:35 PM   #1
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Very Likely Stupid Question regarding changing final drive ratio

Hello All,

I was wondering if there is anyway to change the final drive ratio on the Focus SVT. I am still building my knowledge of cars so this is likely a dumb question.

I am pretty sure in a RWD car you can change the rear end with say a low 3 ratio differential reverses a 4.10. I was wondering if you can do something like this in a FWD car or if the transmission/differential are pretty set in stone.

I could imagine there is not much of an aftermarket even if this was an option since normal people typically want i higher ratio for quicker acceleration. I just wish the SVT had a taller final gear, kills me to see about 4k RPMs when doing 80-85 on the highway. Would be nice to be in the low 3's and just downshift when needed. I feel you barely even need to downshift in the SVT when needing to accelerate on the highway due to gearing once you're above 75 (I typically still do just saying).

I did try to search the forums for this question, just found threads on people talking about how the getrag has two different final drives when comparing 1, 2, 5, and 6, vs 3 and 4.


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Old 08-11-2014, 11:33 PM   #2
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Moved this to SVT performance for a better fit.

While I've seen info. on slightly different ratios in MTX-75 versions, I haven't seen any variants noted for the getrag 6 spd. in the SVT.

Aftermarket LSD is the only option for the transaxle I know of, even repair/rebuild parts are virtually unavailable.
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Old 08-12-2014, 06:26 AM   #3
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I heard rumors of them on the UK side, for the ST170. But yeah, not worth it in the price. Same with rebuilds costing 2700 for everything.
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Old 08-12-2014, 09:44 PM   #4
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Thanks for the input guys, much appreciated, sad this is not very feasible.

Oh well, just gotta get a corvette to satisfy my weird fetish for highway cruising at at low RPMs!!
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Old 08-12-2014, 10:04 PM   #5
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Why does high RPMS bother you though....? It isn't eating gas like a corvette would even at lower rpms...?
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Old 08-12-2014, 10:20 PM   #6
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I just figure if the SVT had a much taller six gear it could get 30+ mpg on highway. It would be nice on road trips to get more than 250 miles on a tank too. When i'm on road trips averaging 80-85 i'm getting about 26 mpg, which I bet wouldn't be to far from a base corvette at that speed, and it's got a 6.2 L V8, not just a little 2.0L I4 on tap too. Don't get me wrong though, i like my higer revving engine, just like the low rpm's for the last gear for highway cruising too. But seeing there is nothing easy to get, the option you mentioned I would never make up in the difference in cost in gas.
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Old 08-13-2014, 12:16 AM   #7
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Another option is to slow down. I think it was geared to have good highway MPG at 65mph, I get 31 MPG if I'm not in a rush. I do know what you're saying, I wish the engine would turn just a little slower in 6th too.

The mediocre hatchback aerodynamics might have a little to do with it. On my Scangauge at 65 MPH it shows good mileage, at 67-70 MPH it drops like a rock even though the RPM didn't change drastically.
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Old 08-13-2014, 01:01 AM   #8
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the cooper S has the same trans for the most part as the SVT
but it has different gears or final drive I guess if you really want you could look into that

nothing state side for the SVT trans besides diffs
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Old 08-13-2014, 08:05 AM   #9
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Quote:
Originally Posted by 2002svtfocus View Post
I just figure if the SVT had a much taller six gear it could get 30+ mpg on highway. It would be nice on road trips to get more than 250 miles on a tank too. When i'm on road trips averaging 80-85 i'm getting about 26 mpg, which I bet wouldn't be to far from a base corvette at that speed, and it's got a 6.2 L V8, not just a little 2.0L I4 on tap too. Don't get me wrong though, i like my higer revving engine, just like the low rpm's for the last gear for highway cruising too. But seeing there is nothing easy to get, the option you mentioned I would never make up in the difference in cost in gas.
I used to work with a guy that had a 2005 Vette, and he showed me a picture on his cellphone once from when he was on a road trip. The car was at 95mph and getting 27mpg according to the dash cluster. Idk if he let off the gas or was going downhill, but if that was true that'd be pretty sweet.
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Old 08-13-2014, 02:53 PM   #10
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I regularly get between 310 to 330 miles to a tank of gas. This is with mixed city and freeway driving.
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