salisbury ratio options

[wozapinin]

g'day, I've just purchased a series 3 lwb with standard ratio salisbury diff. As i do hwy driving as well as 4wd what are my options as far as swapping ratios? Do i have to change both front and back centres to match? My series 2 runs the earlier diffs with range rover centres and works well. Would prefer to just change out centre/s...cheers.

[dandlandyman]

I think the option for changing diff centres on a lwb S3 is to find a Stage One rear axle (good luck with that). I suppose you could get 3.54:1 ratio crownwheel and pinion set and try to rebuild it into the standard S3 case, but I think this will cost heaps and I don't know if it is actually possible (advice please!). The front axle is easy - any early Range Rover diff will bolt straight in. Be aware that if you change diff-ratios, you are legally required to recalibrate the speedo.

Alternatively, get hold of an overdrive. Quite expensive new, but you may find a good secondhand one for a couple of hundred. Or even look at the high-speed transfer case conversion - produces the same overdrive ratio as bolt-on O/D but it's not selectable. Using either of these methods doesn't require any speedo mods... Except maybe watching it a little closer...

Dan.
69 2A 88" pet4, 74 3 109" pet4, 68 2B FC pet6.

[JDNSW]

As Dandylandyman says - your only (practical) options are the standard 4.7 and the 3.54 of the Stage 1. It would be possible to swap the centre from a later coil sprung Landrover, which is also 3.54, but more complex, and there may be issues - I know you can't just swap the crown wheel and pinion, but I think you can the whole centre - but adjustment and setting up is an expert job.

Alternatives are an overdrive as mentioned. These are available new, and often come up second hand. By far the easiest option, but the Fairey overdrive is fairly fragile, so be very cautious of any second hand ones (parts are readily available but are expensive. If you can find a Toro one, grab it - parts are hard to find but you won't need any; just make sure it is complete!

A high ratio transfer case is an option, but fairly expensive, and a fair bit of work.

What engine do you have? The Landrover engines fitted will not be hurt by running at achievable road speeds, and a bit of attention to things like tappets and bit of under bonnet insulation will quieten things as much as an overdrive. On the other hand, if you have a Holden engine, some change of gearing is really needed if you are doing much highway driving.

John

[dandlandyman]

I just checked my Four Wheel Drives catalogue, because I thought they had new 3.54 crownwheel and pinion sets for sale, but only 4.7s and 4.1s are available, at $412-660.00 each. A bit steep considering the extra work still needed.

High-speed transfers are now $1100.00, which is a viable alternative to a new O/D(approx $2500.00). I have a Toro O/D in my 2A, and find I couldn't do without it, now. I'm going to have some serious thinking to do when I get the Forward Control going, though. I'm hoping that the standard Rover gearbox and 8.25-9.00x16 tyres (whatever I can afford) will behave like an O/D, especially with my self-imposed 50mph speed limit.

Hey, here's a thought! Does anyone know if FWD Motors in Brissy is still open? They used to be agents for Rocky Mountain parabolics, and Roverdrives. Might be worth checking out...

Dan.
69 2A 88" pet4, 74 3 109" pet4, 68 2B FC pet6.

[agrojnr]

I always thought you can swap the centres from a range rover??

Ben (isuzurover) would be the one to ask

Adam

[JDNSW]

I always thought you can swap the centres from a range rover??

Ben (isuzurover) would be the one to ask

Adam

yes, you can on the swb - but not on the salisbury rear axle fitted to the lwb Series 3.

John

[45tr0]

would it not be easier and cheaper to try and track down a rear axle from a sII or SWB, then swap the guts out to RR gear?

[JDNSW]

would it not be easier and cheaper to try and track down a rear axle from a sII or SWB, then swap the guts out to RR gear?

Yes, but then you lose the advantage of the strength of the salisbury - lwb 2as have a well deserved reputation for breaking half shafts and diffs (usually the shaft the planet wheels are on). Less of a problem with the Rangies and Discos or swbs, or even the front, because they have a lower maximum axle load.

John

[wozapinin]

cheers for the replys:D. looks like the less expensive option is the early diff with rangy centres. I do have both but it means ratting projects i didn't really want to...the vehicle in the best nick wins out.

[Sleepy]

I think there is an overdrive on e-bay at the moment. Might be a simpler option.

Edit: Here 'tis http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=300300540714

[101RRS]

looks like the less expensive option is the early diff with rangy centres. I

But as said by John, a rangy diff will not fit in your rear axle housing as it is a salsbury and RR are rover diffs.

Garry

[Tank]

I think there is an overdrive on e-bay at the moment. Might be a simpler option.

Edit: Here 'tis Land Rover Series 2 or 3 Fairey Overdrive - eBay, Other Car Parts, Accessories, Car Parts, Accessories, Cars, Bikes, Boats. (end time 22-Mar-09 14:54:31 AEDST) (http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=300300540714)
I would be very wary of any secondhand Fairey Overdrive gearbox, the "clutch" hub that joins the M/Shaft of the main G/box to the main drive in the O/D box is almost always worn out which wears the inside of the O/D main drive shaft, (that black extended cog you can see at the front of the O/D) and to replace those parts, which is necessary if you dont want the O/D to fail will cost more than a Transfer case high speed gear upgrade. If you can't inspect one up close dont take the gamble, I learnt the hard way, Regards Frank.

[Sleepy]

I would be very wary of any secondhand Fairey Overdrive gearbox, the "clutch" hub that joins the M/Shaft of the main G/box to the main drive in the O/D box is almost always worn out which wears the inside of the O/D main drive shaft, (that black extended cog you can see at the front of the O/D) and to replace those parts, which is necessary if you dont want the O/D to fail will cost more than a Transfer case high speed gear upgrade. If you can't inspect one up close dont take the gamble, I learnt the hard way, Regards Frank.


Thanks Frank, sound advice - no doubt.
I have just bought a S3 with a Fairey O/D, hope it is not too worn.
Is there an indication that they are on the way out? Noisey??
I have been advised to check oil regularly as they have on a small oil volume.....

[JDNSW]

Thanks Frank, sound advice - no doubt.
I have just bought a S3 with a Fairey O/D, hope it is not too worn.
Is there an indication that they are on the way out? Noisey??
I have been advised to check oil regularly as they have on a small oil volume.....

They are always noisy, and it is not a good indicator of condition, in the sense that a noisy one is not necessarily badly worn, although a quiet one is probably not. But the most critical point is the drive from the gearbox mainshaft. This is via a two part dog, one which goes on the mainshaft (reasonably cheap to replace) but the other side of which is in fact the mainshaft of the overdrive. This is NOT cheap to replace! And the joint between the two parts does not have adequate lubrication - it relies on the grease it was assembled with, and there is little chance of it ever getting any more oil on it! If you have just bought a Series Landrover with one, I would plan on removing it ASAP and relubricating it as well as checking its condition.

John

[Sleepy]

Thanks John,
I'll add that to the to-do list ;)

[EchiDna]

alternative:

great basin rovers in the US (exchange rate pain warning!) make a VERY wide range of ratios including reverse cut 4.11's for the salisbury
Great Basin Rovers - navbar (http://www.greatbasinrovers.com/)

[paulthepilot_5]

I just checked my Four Wheel Drives catalogue, because I thought they had new 3.54 crownwheel and pinion sets for sale, but only 4.7s and 4.1s are available, at $412-660.00 each. A bit steep considering the extra work still needed.

High-speed transfers are now $1100.00, which is a viable alternative to a new O/D(approx $2500.00). I have a Toro O/D in my 2A, and find I couldn't do without it, now. I'm going to have some serious thinking to do when I get the Forward Control going, though. I'm hoping that the standard Rover gearbox and 8.25-9.00x16 tyres (whatever I can afford) will behave like an O/D, especially with my self-imposed 50mph speed limit.

Hey, here's a thought! Does anyone know if FWD Motors in Brissy is still open? They used to be agents for Rocky Mountain parabolics, and Roverdrives. Might be worth checking out...

Dan.
69 2A 88" pet4, 74 3 109" pet4, 68 2B FC pet6.

They are still open. I don't know if the still sell the overdrives. If they do they wont be cheap :eek:

Paul

[isuzurover]

There are HEAPS of ratio options for the Salisbury/Dana60: Prices in $US from randys ring and pinion.

3.54 Ring & Pinion KIT $391.64
3.73 Ring & Pinion KIT . DS 706033-2 $411.16
4.10 Ring & Pinion KIT . DS 706033-3 $391.64

NOTE - there is a hemisphere change between 4.1 and 4.56

4.56 Ring & Pinion KIT . DS 706033-4 $392.42
4.7:1 (Series Land Rover)
5.57:1 (101 FC)
5.86 Ring & Pinion KIT . DS 706033-6 $408.49
6.17 Ring & Pinion KIT . DS 706033-7 $397.33
7.17 Ring & Pinion KIT . DS 706033-8 $403.29

You need to change a couple of minor parts to fit D60 gears into a salisbury.

Though you need a matching front...