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gear ratios for my 110

Tech Talk for Rover owners.

Moderator: Micka

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gear ratios for my 110

Post by uninformed »

ok how in the, real world, do you all think these ratio's will be for all types of 4x4ing. dd on 32's off road 34-35's. as i haven't done alot of hardcore offroading they are only numbers to me.these are approx, but close enough:
high range low range
1st: 21-1 75-1
2nd: 12-1 43-1
3rd: 8-1 28-1
4th: 6-1 20-1
5th: 4-1 15-1
reverse 20-1 69-1

all thoughts/ideas appreciated
serg
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Post by ISUZUROVER »

I take it this combo is: R380, LT230 with MD low range gears (and 1.2:1 high), and 4.7's.

I think that 75:1 will be a good crawler gear but too low for a lot of things, so you will do most of your 4x4ing in 2nd and 3rd low, however I think that on 35's you may find yourself wishing for a gear between 1st and 2nd low. However if you have a tweaked Tdi it should still be able to pull the 35's at all times in 2nd so should work quite well.
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Post by red90 »

4.7s and 32s on the road will mean you are reving high all the time.

3000 rpm at 110 km/h
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Post by uninformed »

5th gear will only be 16% lower than standard. i don't have a tacho so i couldn't tell you what revs i'm doing now. basicly 90% of my dd is done with a 1.8 tonne dual axle tailer. normal gearing is not that good especialy 1st gear and reverse, on steep hills i start in low range and double shift into high on the move, not that smoothly all the time either!
serg
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Post by ISUZUROVER »

Sounds like it will be a big advantage on-road then. Have the pump mods done on the Tdi and moved the boost pressure sensor to the inlet manifold?
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Post by Maggot4x4 »

Will those 4.7's put up with long term stress of towing that weight all the time?
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Post by ISUZUROVER »

Maggot4x4 wrote:Will those 4.7's put up with long term stress of towing that weight all the time?


The rear is a salisbury (Dana 60) so could probably tow 8 tonnes all day without problems. The front R&P may eventually have issues, depending on which one is used and how much it is abused offroad.
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Post by modman »

when the rover front craps `itself go the toy route.
just make sure there is an identical toy ratio
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Post by modman »

just another point, when towing with the r380 be careful of the torque you put through 5th gear.
my ute has lt77 with mods from new and 1.222 transfer gears.
great for towing at 100kph in 4th.(strong gear)
shit for pushing 34's anywhere in high range.
david
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