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Merk
Joined: Wed Sep 02, 2009 11:30 pm Posts: 111 Location: Rockhampton, QLD
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 Posted: Tue Nov 17, 2009 9:54 pm |
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After getting my 31's recently, my gearing is obviously compleatly stuffed, so I've finally saved up enough money to get some some reduction gearing for my 1.3 sierra. Only thing is i still cant decide between the 4.16:1 or the 6.5:1 gears. Just after some advice from zook owners who run 31"s with either of these gears, particularly in regard to highway driving, towing and general offroad.
The main points pushing me away from the 6.5's are that it might just be too low, particularly because i often tow my tinny about 30ks on the highway and dont want to use fifth gear. I imagine this would restrict me to about 70-80 in fourth gear without over-reving the motor.
Ideally i would like the 4.9's, but i cant justify spending an extra $100 on a lower ratio lol. So i am then pushed towards the 4.16's. Does anyone have these, and how is the low range reduction?
I also do quite alot of sand driving and cant imagine the 6.5's being too good in the sand? I know this stuff has been asked a million times, but if you can be bothered, please offer some advice.
Thanks, Mark
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31zook
Joined: Tue Mar 24, 2009 10:30 pm Posts: 9242 Location: maito
Vehicle: <3 Edna <3
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 Posted: Tue Nov 17, 2009 10:02 pm |
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6.5 for rocks and 32+ tyres. I could do about 80kms at 3200rpm on 31s and it would still pull from 5th. I would be happy to tow stuff with a 1.3 and 6.5s it just means your more setup for it... beaching on 6.5s with 31s is easier than 31s with a 1L case... Never ran the lesser reduction so can't tell you...
also shep towed a tinny around the NT so he might be the wises of us all
JMHO hope that helps
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shep
Joined: Thu Mar 29, 2007 11:30 pm Posts: 14498 Location: Here there everywhere
Vehicle: A manly awesome man jimny
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 Posted: Tue Nov 17, 2009 10:40 pm |
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6.5s are the go. some people whinge about low range being to low however they
seem to forget that there are 5 gears in the g/box. mine does 100kph at 3600rpm and when i put the 1.6 in my
swb i could sit on 100kph comfortably when towing.

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shep
Joined: Thu Mar 29, 2007 11:30 pm Posts: 14498 Location: Here there everywhere
Vehicle: A manly awesome man jimny
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 Posted: Tue Nov 17, 2009 10:43 pm |
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i origanally ran a 1ltr trans case but a kombi overtook me on the highway so that prompted me to lower the
gearing farther and the 6.5s completely transformed the car.
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Bruce

az supporter
Joined: Sun Jun 11, 2006 11:30 pm Posts: 4003 Location: Brisbane
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 Posted: Tue Nov 17, 2009 11:13 pm |
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Calmini 5:14:1 I run in Casper with 31's Love it works great.
_________________ [quote="royce"] I wouldnt mind insulating my rear
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Merk
Joined: Wed Sep 02, 2009 11:30 pm Posts: 111 Location: Rockhampton, QLD
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 Posted: Tue Nov 17, 2009 11:57 pm |
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Haha i know how you feel shep, got overtaken by a lada towing a box trailer full of shit the other day and that hurt. Thanks for the info on the gears guys, i'd say i'll just go for the 6.5's. I'll probably get bored of my 31"s one day anyway and want to upgrade.
Do you tow in fourth or fifth shep?
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shep
Joined: Thu Mar 29, 2007 11:30 pm Posts: 14498 Location: Here there everywhere
Vehicle: A manly awesome man jimny
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 Posted: Wed Nov 18, 2009 12:22 am |
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5th mate, unless the revs drop below 3000.
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lump_a_charcoal

az supporter
Joined: Wed Feb 28, 2007 10:30 pm Posts: 4454 Location: Botany, NSW
Vehicle: MY2019 Jimny
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 Posted: Wed Nov 18, 2009 12:33 am |
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Go for the 6.5s.
They have a life time warranty too!
I have 6.5s, 3.9 diffs and 31s, plus a tired 1.3 motor - I zip around just fine, and can tow by 7x4 box trailer in 5th easy.
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jamhic
Joined: Sun Jan 04, 2009 10:30 pm Posts: 76 Location: Melbourne
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 Posted: Wed Nov 18, 2009 12:43 am |
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Go the 6.5s, I recently got them and was worried they would be too low (I only have 30s on at the moment) but it makes the car so much more drivable on and off road.
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mcwilly
Joined: Sun Sep 21, 2008 11:30 pm Posts: 867 Location: nsw, newcastle
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 Posted: Wed Nov 18, 2009 3:44 am |
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I tow a 6x4 box trailer with 31 and 6.5s goes good except when a big load. I love 6.5s.near Impossible to get bogged on the beach
_________________ 1996 sierra + 2" body lift + SPOA conversion + ome
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jdk81
Joined: Sat Jul 18, 2009 11:30 pm Posts: 2372 Location: Ballarat, VIC
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 Posted: Wed Nov 18, 2009 4:07 am |
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I run 6.5:1 and 32" pedes for off road.
With the pedes on, the gearing is almost spot on again.
Use a gearing calc to work out your speeds.
http://www.lepayne.com/gears.html
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