Outer Limits 4x4 Board

does someone know what gearing ratio is in the series 1 3.5l disco, high range. I have been lead to believe it is a 1 to 4
i am looking at putting a defender high range gear in which i believe is a 1 to 2. This is to try an compemsate for the lack of power running 33'' tyres on the road as it suxs going up long hills Coopers have gone over the engine and it is running fine.
has anyone ever changed these gearing and ifso how well did it go afterwards.

I have 4.1 cwp in now and they made a huge difference from the old 3.54 diffs . The cwp arnt that expensive and once set up right are fairly strong .

T/casae gear ratios,

1984-5 3 speed auto 1.003-1
all 5 speed manual petrol 1.192-1
5speed desiel 1.41

and I believe there was a 1.667-1

all low ranges were 3.32-1

Michael.

I am running a LT230 from a VM diesel Rangie and this has made a big diffrence to the Rangie (My Rangie was originally a Viscous Coupling tramnsfer case. Got sick of getting stuck everywhere!!)

I think the gearing in my Rangie is now 1.2:1 and the gearing in the VC unit was about 1:1 (like the torque-flyte LT230), but I am running 31's, not 33'sa like you are. I plan to run 32's next time and this shouldn't make too much of a diffrence. It doesn't matter anyway because like Micheal has mentioned, all low range gearing is the same.

I know Mal Storey at Maxi Drive makes a 30% reduction gearing for low Range and this would be benificial if you have a ZF auto like I do. Not cheap, but worth it for better low Range. High Range remains as normal.

Best of luck,

Trav

If it ain't broke, leave the bastard alone!!!

When i went to 33's originaly in my Rangie i put a Defender transfer case in to compensate for the bigger tyres. As Michael said the ratio is about 1.4* which compensates perfectly for 33's (the speedo is spot on according to my GPS). The downside to this is that low range is unaffected whereas changing the CWP ratio to 4.11 from the standard 3.56 changes both high and low range. The main disadvantage with changing the CWP is that their strength decreases as the ratio numerically increases.
I now have the MD crawler gears in mine and it has made a huge difference offroad.

yes the RR R&P are weak.

Fit Toy R&P problem solved.

Michael.

Im running a 1.41:1 defender LT230, zf, 4.2 Rover and 32" tyres and its still undergeared/underpowered.

If I had to make the choice I would run 4.11 toy gears, 1.41 high and maxi drive low, if I was poor I would run 4.3 or 4.56 toy gears and the 1.22:1 disco case for 33" tyres and a Rover 3.5. Let it rev a little and put up with the poor fuel mileage.

Cheers
Daryl