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Sierra W/T gearing

Posted: Mon Aug 24, 2009 9:24 pm
by wickedstix
hi all

i know i'm not the only one who is having trouble with stock 1.3ltr w/t gearing,

so with running 31" tyres, whats the best / cheapest / most effective gearing combo eg. 1ltr transfer, rock lobster etc.

please help with how you fixed and rough cost,

i would like to ideally be able to crawl in low 1st with no ecceleration, but keep high range still drivable and fix the speedo difference,

thank heaps

Posted: Mon Aug 24, 2009 9:41 pm
by Gwagensteve
4.9 or 6.5 transfer gears.

Either will correct you high range almost perfectly and provide enough low range.

4.9 if you are more into mud or flatter country, 6.5 if you are into the steep stuff.

A 1.0 case will help but won't correct enough in either high or low, and 5.12 gears are cheaper to buy (if you can find some wrecked vitaras) but your gearing will be too short in high range (4100 rpm @ 100km/h) and only 41:1 crawl ratio.

1.0 litre case: 3259@ 100km/h and 34:1 low range.

6.5 transfer gears: 3475@100km/h, 87:1 low range.

(Stock - 3475rpm @ 100km/h and 29:1 low range.)

Steve.

Posted: Mon Aug 24, 2009 10:20 pm
by wickedstix
he steve

thanks heaps :) but whats the cheapest way to get these 4.9 or 6.5 ????

Posted: Tue Aug 25, 2009 7:46 am
by PJ.zook
You could keep an eye out for second hand sets, they come up every now and then. Or you could wait for someone like BBM to have a sale, etc...
I got my Series4's from BBM for $900 i think it was quite a few years ago.

Posted: Tue Aug 25, 2009 1:13 pm
by lump_a_charcoal
Best way is wait until the dollar is good against the greenback and buy some 6.5s - complete with lifetime warranty!!!

Posted: Tue Aug 25, 2009 4:35 pm
by alien
im running the calmini 5.14 gears... theyre great thus far (almost 2 years of abuse)... its a middle ground between the 4.9 and 6.5 and still brings high range back into stock area. offroad in low i tend to use low 2nd and 3rd more than low 1st. 1st is only good when you have a lot of grip and in a technical section of track, otherwise its too slow.

Posted: Wed Aug 26, 2009 12:23 am
by Moph
I bought TrailGear 6.5's from LowRange Offroad (US) in early July. Took around 7 days to arrive and were US$633 landed ($839 AUS including delivery and currency conversion fee). Reckon it would be about $800 even at the moment with current dollar value.

Absolutely awesome offroad :cool: Kinda interesting on the freeway with 235/75R15s though... :)

Posted: Wed Aug 26, 2009 7:18 am
by Daisy
Gwagensteve wrote:4.9 or 6.5 transfer gears.

Either will correct you high range almost perfectly and provide enough low range.

4.9 if you are more into mud or flatter country, 6.5 if you are into the steep stuff.

A 1.0 case will help but won't correct enough in either high or low, and 5.12 gears are cheaper to buy (if you can find some wrecked vitaras) but your gearing will be too short in high range (4100 rpm @ 100km/h) and only 41:1 crawl ratio.

1.0 litre case: 3259@ 100km/h and 34:1 low range.

6.5 transfer gears: 3475@100km/h, 87:1 low range.

(Stock - 3475rpm @ 100km/h and 29:1 low range.)

Steve.
based on NT (3.9) or WT (3.7) ratios?

Posted: Wed Aug 26, 2009 10:00 pm
by Gwagensteve
Those calcs were done with 30.5" actual tyre height and 3.7 WT ratios.

Steve.

Posted: Wed Aug 26, 2009 10:31 pm
by Taff
I just bought new 6.5 gears from locktup4x4.com.au

They were $760 to my door. took about 7 working days for delivery from the US.