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shippo
Joined: Fri Apr 09, 2010 11:30 pm Posts: 74 Location: tamworth nsw
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 Posted: Thu Jun 17, 2010 12:00 am |
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Hey all am looking at a set of reduction gears for my zooki and was just wondering if there are any advantages / disadvantages apart from the slower crawl speed
Cheers Sean
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JrZook
Joined: Tue Aug 08, 2006 11:30 pm Posts: 5517 Location: Holland Park
Vehicle: Awesome!!
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Posted: Thu Jun 17, 2010 12:19 am |
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+Awesome low range
+Wayyy better high range
+Better acceleration
+Better fuel economy
Negatives?? Well just you have to spend some $$ and some time installing them but thats what you would do with pretty much any add on.
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shippo
Joined: Fri Apr 09, 2010 11:30 pm Posts: 74 Location: tamworth nsw
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Posted: Thu Jun 17, 2010 12:24 am |
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am a bit stuck have been reading a bit on here and everyoine says they help high range thbut are they talkingg about high 4 or high 2 but if they are talking about high 2 how do they affect 2wding ???? am new to all this so ay explanation is welcome
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Ben_Sierra
az supporter
Joined: Wed Sep 30, 2009 11:30 pm Posts: 4472 Location: Perth
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Posted: Thu Jun 17, 2010 12:30 am |
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High 2 and High 4 use the same gears, its just whether the front output is engaged or not.
Reduction gears will help restore good road gearing with larger tyres. That is one of the big advantages. The other is the reduction in low range to give you a nice low crawl.
When it comes to reduction gears you need to weigh up a number of things such as tyre size, how much highway driving you do, and what sort of 4WDing you do in order to get the right gears for the application.
_________________ I want my old sig back 
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matfan
az supporter
Joined: Sat May 29, 2010 4:27 pm Posts: 935 Location: Paraguay
Vehicle: WT Tinny, NT lwb, 1L lwb
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Posted: Thu Jun 17, 2010 12:37 am |
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Advantages.
Torque Multiplication - more available grunt and control (go more places easier)
Disadvantages.
Torque Multiplication - more loading on all of your moving parts (more time on auszookers looking for answers about the weird grinding noises your drivetrain is making)
_________________
JrZook - Mine only hangs 2.5".
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neofitou
Joined: Wed Mar 24, 2010 10:30 pm Posts: 1088 Location: Melbourne
Vehicle: 00 Jimny, 63 Haffy
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Posted: Thu Jun 17, 2010 1:23 am |
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You dont _need_ to do it till you go above 29s apparently.
I only used 5th gear going down a hill on the freeway with the stock transfer case gears and 31" tires.
I have a 1L Tcase in mine, which has fixed highway, and is pretty good in 2L, but I still use more revs and more clutch than I would like on the steep stuff.
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Ben_Sierra
az supporter
Joined: Wed Sep 30, 2009 11:30 pm Posts: 4472 Location: Perth
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Posted: Thu Jun 17, 2010 1:26 am |
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matfan wrote: Advantages.
Torque Multiplication - more available grunt and control (go more places easier)
Disadvantages.
Torque Multiplication - more loading on all of your moving parts (more time on auszookers looking for answers about the weird grinding noises your drivetrain is making)
Yes and no.
I know whats better for your drivetrain... 31's with gears, not 31's without... its not just about gears, its the whole setup. _________________ I want my old sig back
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joeblow
Joined: Sat May 10, 2008 11:30 pm Posts: 3273 Location: melbourne
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Posted: Thu Jun 17, 2010 1:37 am |
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Ben_Sierra wrote: matfan wrote: Advantages.
Torque Multiplication - more available grunt and control (go more places easier)
Disadvantages.
Torque Multiplication - more loading on all of your moving parts (more time on auszookers looking for answers about the weird grinding noises your drivetrain is making) Yes and no. I know whats better for your drivetrain... 31's with gears, not 31's without... its not just about gears, its the whole setup. its easier on components forward of the transfer, but loads after, i.e diffs and tailshafts still have similar or much higher torque loadings, hence all the need to beef up stuff after the t/case.
_________________
builder of custom road legal zooks......and stuff.
Last edited by joeblow on Thu Jun 17, 2010 9:50 am, edited 1 time in total.
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dano_mung
Joined: Sun May 17, 2009 11:30 pm Posts: 237 Location: Brisbane
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Posted: Thu Jun 17, 2010 4:04 am |
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shippo wrote: am a bit stuck have been reading a bit on here and everyoine says they help high range thbut are they talkingg about high 4 or high 2 but if they are talking about high 2 how do they affect 2wding ???? am new to all this so ay explanation is welcome
In Sierra's reduction gearing effect both the high and low range ratios.
Most other car reduction gear changes only effect low range.
This is an advantage if your car is already on big enough tyres or can handle an upgrade without too much problems (patrol/cruisers).
But in the zook case it also helps to bring your overall ratios back to near standard or better with larger tyres.
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