lower ratio low range ?

Submitted: Thursday, Jun 14, 2012 at 19:57
ThreadID: 96272 Views:2475 Replies:6 FollowUps:6
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I took our holden rodeo down a fairly steep hill recently and it was impossible to slow the decent by just using the gears ( locked in low, low range in the 4 speed auto )

I am just curious as to the feasibility of changing the low range to a lower gearing ratio.

Has anyone done this ? Is it simple, difficult, ridiculous or impossible ?
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Reply By: Rangiephil - Thursday, Jun 14, 2012 at 20:08

Thursday, Jun 14, 2012 at 20:08
In these days of disc brakes and ABS, it is completely unnecessary unless you compete in rock crawling events .

In fact the Freelander has NO low range yet can go down hills quite well with its HDC which is just an automatic ABS and easily replicated by a good driver.
Going up might be another matter.LOL
Regards Philip A
AnswerID: 488475

Follow Up By: D200Dug- Thursday, Jun 14, 2012 at 20:38

Thursday, Jun 14, 2012 at 20:38
I was wondering about that, I learned most of my 4x4 driving on a single ratio subaru so being light on the brakes downhill is not difficult for me.

The guy showing me the track was comfortable with how I drove it I was just curious
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Follow Up By: Michael ( Moss Vale NSW) - Saturday, Jun 16, 2012 at 18:22

Saturday, Jun 16, 2012 at 18:22
Phil!! i would be more concerned with going up steep hills without a low range. Going down shouldn't be too hard but being stuck at the bottom between two hills would appear to be more of a problem!! :)) Michael


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Reply By: troopy al - Thursday, Jun 14, 2012 at 20:21

Thursday, Jun 14, 2012 at 20:21
Hi d200dug
You have not stated whether you have a petrol
diesel motor. This makes a great difference. Diesel motors have a lot more engine braking ability. petrol motors will tend to rev off the scale. You can buy reducton gears for auto's that will help a great deal
AnswerID: 488477

Follow Up By: D200Dug- Thursday, Jun 14, 2012 at 20:35

Thursday, Jun 14, 2012 at 20:35
diesel

I can lock it in first low and it was not too bad but it was a pretty steep decent
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Reply By: AlbyNSW - Thursday, Jun 14, 2012 at 20:23

Thursday, Jun 14, 2012 at 20:23
I know your feeling, the Hilux is the same. I just feather the brakes to stop too much momentum and I find it no problem. This is the only disadvantage of these auto boxes but find them superior to the manual box in all other aspects so happy to live with it.
The newer boxes have much better gearbox engine braking.

I know you can do a solenoid upgrade that will lock the box up but I have not found that to be necessary
AnswerID: 488479

Follow Up By: D200Dug- Thursday, Jun 14, 2012 at 20:39

Thursday, Jun 14, 2012 at 20:39
the box already locks in first low so that is not the problem.

I have always disliked autos but the new ones are a whole lot better than the old slush boxes of the past
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Follow Up By: AlbyNSW - Thursday, Jun 14, 2012 at 20:46

Thursday, Jun 14, 2012 at 20:46
Yes mine does too but if you do a valve body upgrade it locks the torque converter up to the point of stalling the motor if you stop the vehicle with your brakes ( same as a manual with clutch out) without switching valve off
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Reply By: Robin Miller - Thursday, Jun 14, 2012 at 20:32

Thursday, Jun 14, 2012 at 20:32
Did that in my 4800 Patrol to make having an auto bearable.

I fitted 44% reduction gears in the transfer case and it really was a winning modification.

The gears tend to be straight cut and make a bit more noise than original Nissan ones however not a problem and noise only there in low range anyway.

Engine braking was transformed and matching my similar manual 4800 Patrol.

Car still can do 80 kmh in low range.
Robin Miller

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AnswerID: 488481

Reply By: Member - mechpete - Thursday, Jun 14, 2012 at 21:17

Thursday, Jun 14, 2012 at 21:17
I,m on my 2nd auto patrol , GQs the early had to smaller brakes ,it got a very
ordinary pedal when hot . The 97 GQ has bigger pads an rotors , if you put
good quality pads in it never have an issue .
mechpete
AnswerID: 488488

Reply By: Member - Lachy T - Friday, Jun 15, 2012 at 06:57

Friday, Jun 15, 2012 at 06:57
I love the start difference between auto and manual. I have a manual diesel rodeo and if you put it in 1st low on a steep down hill you feel as if you are going backwards up it you go that slowly!
AnswerID: 488514

Follow Up By: garri - Friday, Jun 15, 2012 at 09:34

Friday, Jun 15, 2012 at 09:34
put the air-con on
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