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How do I know if i have reduction gears or not?
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Author:  timmyd112 [ Mon Jul 02, 2018 7:17 pm ]
Post subject:  How do I know if i have reduction gears or not?
Hi I currently have 31's on my auzuki aierra wt, and at 100 I am at 3200 rpm
Author:  Technotron101 [ Mon Jul 02, 2018 9:43 pm ]
Post subject:  Re: How do I know if i have reduxtion gears or not?
I've just plugged some values into the gearing calculator, and I reckon you're standard.
http://www.zuk-n-ovations.com/gear_calc.html

If:
A leafy 1.3 transfer in high range is 1.409,
1.3 leafy diffs are 3.727,
Wt 5th gear (should be, but depends on year) is 0.864,
Tyres are 31" tall, then

At 3200RPM you're traveling 65mph or 102kph. So that's pretty much what you've got:
A 0.864 fifth gear (and by association, a 1298cc motor (vs 1324cc)), stock 1.3 leaf transfer, stock diff gears and 31s.

Hope that helps :peaceout:
Author:  bumstein [ Mon Jul 02, 2018 10:41 pm ]
Post subject:  How do I know if i have reduxtion gears or not?
I’ve got 3038 in 5th (assuming sj70 5th gear), WT diffs and standard 1.3 transfer.

3428 for same as about but a 1ltr transfer case.

You’re close to being bang in the middle. But there could be differences I tyre circumference, I’d suggest Technotron is correct, your on stock gearing.

Edit: is your 100kph by the speedo or gps?

Image

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Author:  timmyd112 [ Tue Jul 03, 2018 6:51 am ]
Post subject:  Re: How do I know if i have reduction gears or not?
Thanks for the reply. It's by the speedo
Author:  shep [ Tue Jul 03, 2018 7:20 am ]
Post subject:  Re: How do I know if i have reduction gears or not?
Speedo doesn't change with transfer gearing changes. My old LWB was nearly 30% out. Check again with a gps and see what revs you have,
I found it easier to just put a speedo app on my phone and use it.
Author:  bumstein [ Tue Jul 03, 2018 9:09 am ]
Post subject:  Re: How do I know if i have reduction gears or not?
With 31” tyres your speedo will be out by around 11% give it take? So when your speedo is telling you 100kph you’d actually be doing closer to 111kph.

So you’d almost certainly be running stock gearing.
Author:  Gwagensteve [ Tue Jul 03, 2018 10:09 am ]
Post subject:  Re: How do I know if i have reduction gears or not?
17% so 117km/h
Author:  just_cruizin [ Tue Jul 03, 2018 11:38 am ]
Post subject:  Re: How do I know if i have reduction gears or not?
If you need to ask, no you don't have reduction gears
Author:  bumstein [ Tue Jul 03, 2018 4:37 pm ]
Post subject:  Re: How do I know if i have reduction gears or not?
Gwagensteve wrote:
17% so 117km/h


Ah thank you!! Was just going by memory after night shift.. not a greatly reliable source
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