Diff Ratios

[Dutchie10]

Hello All,

I have a 2000 Defender Wagon running 35" tyres as such it has affected my fuel economy and speedo, more importantly it has affected my down hill descent when in low range.:(

Does any one know what the standard Diff Ratios are and what ratio would i be looking for to put the gearing back to normal and where i would get a new set of diff gears.
I currently have the Salusbry diff's in the vehicle.

Cheers

Dutchie10

[Slunnie]

3.54 is standard.

It's probably worth contacting Tusker on here.

He has just gone through all of this and now runs 4.11 with his 35's, and also 1.2 high and 49% lows in the transfer. His came with the P38 diffs and is now running a rear Salisbury with Dana 4.11's on Maxidrive lockers and 4.11's in the front to Maxi also.

[mcrover]

LRA bring in 4.11s from the UK or you could order them from Ashcrofts yourself.

Without highly modifying your TC with crawl gearing from the states your best bet would be to fit the 4.11s.

About $600 per end I think is the cost, a mate of mine has just done it to his Disco.

[Slunnie]

IIRC though, the problem at the moment is getting Salisbury 4.11's, which is why Tusker ended up converting to Dana.

[rick130]

IIRC though, the problem at the moment is getting Salisbury 4.11's, which is why Tusker ended up converting to Dana.

Have 4.11 CWP's ever been available for the Salisbury ?

I always thought you needed to use the Dana 60 CWP ? (and the requisite mods, IIRC 1/2" UNF bolts instead of 12mm, different pinion bearing and new (Jeep? ) pinion flange. )

[Blknight.aus]

yes they have but you'll have more luck finding rocking horse poo.

[rovercare]

yes they have but you'll have more luck finding rocking horse poo.

Who or where were they from?

[EchiDna]

Great Basin Rovers in the US...

Great Basin Rovers (http://www.greatbasinrovers.com/aboutset.html)

and Equipe 4x4 http://www.equipe4x4.com/inglese/ARTICOLO.php?MARCA=LAND&SEZ=TRANSMISSIONS&COD=A&NFOTO=2

and even Grahame Cooper according to his webpage...

[Slunnie]

Great Basin Rovers in the US...

Great Basin Rovers (http://www.greatbasinrovers.com/aboutset.html)

and Equipe 4x4 Paginaselezionefinale (http://www.equipe4x4.com/inglese/ARTICOLO.php?MARCA=LAND&SEZ=TRANSMISSIONS&COD=A&NFOTO=2)

and even Grahame Cooper according to his webpage...
I couldn't see any reference to a Salisbury 4.11 on any of the websites. Rover 4.11's are around, P38's are harder especially since the Israeli army bought them all, and the Salisbury.... well, there is Dana 60. I think Tusker said a Ford 9" flange, but may be wrong, it looked like a capped design to me which is very Dana, but he will comment on it.

[EchiDna]

Slunnie you might be right for equipe, but great basin definitely sell them as do east coast rovers: Rover ring and pinions (http://www.eastcoastrover.com/Ringgear.html)

I couldn't find it again before... KAM Diffs also do a 4.1 for the salisbury http://www.kamdiffs.com/overview.htm

[Slunnie]

Slunnie you might be right for equipe, but great basin definitely sell them as do east coast rovers: Rover ring and pinions (http://www.eastcoastrover.com/Ringgear.html)

I couldn't find it again before... KAM Diffs also do a 4.1 for the salisbury Ratio overview (http://www.kamdiffs.com/overview.htm)
Oh yeah, cool. 4.1 have not produced good results compared to the 4.11, but at least there is something similar. I wonder if the problem is availablility then???:confused:

[Tusker]

re the original question, going from 32s to 35s affects gearing by about 15%. To fix it in a disco/range, you've got 2 choices. Either change you t/case hi range from 1.2 to 1.4, or secondly, change your cw&p from 3.54 to 4.11.
Defenders have 1.4s already, do you're limited to the cw&p solution.

Avoid the 4.10s. 4.11s are stronger.

re the second question, a Salisbury can be converted to 4.11 Dana 60 relatively easily, provided tou get the right shims & bearings etc.

Yukon Gear & Axle (http://www.yukongear.com/Default.aspx)

The conversion from P38 to Salisbury has produced a tighter, quieter driveline btw.

Yanks don't seem to use pinion flanges, the strongest setup was a yoke pinion, which mates up to a Ford 9" uni. Its not going to break.

And a maxidrive fits.

Regards
Max P

[Dutchie10]

Thanks for that everyone,

Tusker, what set up did you go with and what sort of ginning around did you have to go through for it to work.??

Cheers

Dutchie

[isuzurover]

In case anyone is interested, the following is a complete (AFAIK) list of ratios for a Sals/D60:

3.54
3.73
4.10
4.30
4.56
4.70
4.88
5.13
6.17
7.17

[rick130]

In case anyone is interested, the following is a complete (AFAIK) list of ratios for a Sals/D60:

3.54
3.73
4.10
4.30
4.56
4.70
4.88
5.13
6.17
7.17

OK, I'm being pedantic :p, I think the 4.3 should be 4.27 as I'm pretty sure that's what was in my two Jeeps (one was a D60 rear, the other a D44)

[mcrover]

OK, I'm being pedantic :p, I think the 4.3 should be 4.27 as I'm pretty sure that's what was in my two Jeeps (one was a D60 rear, the other a D44)

Wooders was advertising a couple of years ago 4.11's for D60 and D44 as well.

4.10 and 4.11 are not the same, may be in ratio but not strength from what I have heard.

[EchiDna]

well there are a couple of links to the salisbury 4.11's above - I don't really want to know how much they cost though!

[Slunnie]

Wooders was advertising a couple of years ago 4.11's for D60 and D44 as well.

4.10 and 4.11 are not the same, may be in ratio but not strength from what I have heard.
Thats correct. they are a different tooth count. 4.1's are 10/41, and 4.11's are 9/37. They both have the same size gear head on the pinion which also loads the CW, but the 4.11 has bigger stronger teeth.

[rick130]

well there are a couple of links to the salisbury 4.11's above - I don't really want to know how much they cost though!

Could the GBR ones be D60's as D60 is part of the part number ?

[Tusker]

Ginning?? Just delays in getting the bits. All came together in the end. Regards Max P.

[isuzurover]

OK, I'm being pedantic :p, I think the 4.3 should be 4.27 as I'm pretty sure that's what was in my two Jeeps (one was a D60 rear, the other a D44)

Sorry Rick, but 4.3 exists, 43/10 according to here:
Precision Gear - Dana 60 Ring and Pinion Gear Sets (http://www.precisiongear.com/dana60.htm)

4.27 must be one of those "jeep things" we don't understand (fortunately) ;)

Mcrover - 4.1 and 4.11 are both strong in a Sals!!! Even 7.17 will hold up to 44's!!!

[rick130]

Well there yo go :o

It was actually a Dana thing as Ford, IH, etc also used the 4.27:1 ratio. I think they were 47/11.

[EchiDna]

quote received from GBR -





4.11

[EchiDna]

hmm that didn't work... try again...

4.11 Salisbury gears (9X37 tooth count) manufactured. Cost is $549.95. Included with the gear set is set up shims (both pinion height and backlash), a new crush sleeve and a new pinion seal

[isuzurover]

hmm that didn't work... try again...

4.11 Salisbury gears (9X37 tooth count) manufactured. Cost is $549.95. Included with the gear set is set up shims (both pinion height and backlash), a new crush sleeve and a new pinion seal

I assume that is US$? A D60 4.10 is only $206.
DANA 44, 28, 30, 35, 36, 50, 60, 61, 70, 70-2U, 70B, 70HD, 70U, 80 - DANA 60 AIR LOCKER, FULL SPOOL, R&P, YOKE, E LOCKER, OPEN, SEAL, SMALL PART, SPYDERS, POSI L/S, GIRDLE, DET LOCKER, TRUETRAC, ELECTRAC, FULL INST, SMALL INST, POWERTRAXX, AXLE SHAFT (http://www.drivetrainspecialists.com/categories/dana/dana-60/products/product-804.html)

Rick - thanks for that - when I searched, all the info was related to jeeps - I found a lot of threads about people swapping them for 4.3s - maybe they are hard to come by these days.

[Aaron]

what would happen if you ran two different diff ratios at the same time?

[isuzurover]

what would happen if you ran two different diff ratios at the same time?

As long as the ratios are within 1% of each other iut won't make a difference.

[Blknight.aus]

in a rover with a center diff and CDL (not a viscus) with the cdl unlocked youd eventually over heat the tcase.

in a series nothing

when you lock the center or engage 4x4 it would create huge wind up and break something or at least make the handling very strange.

in something with the viscous center itd frag the viscous in very short order.

[Bush65]

what would happen if you ran two different diff ratios at the same time?
In normal driving the rear wheels don't travel as far as the fronts (rears run on a smaller turning radius).

So if the front diff was 4.1:1 and the rear was 4.11:1, then it won't make much difference.

If the front was 4.11:1 and the rear was 4.1:1, then it will make a little difference - about the same as different tyre wear or rolling dia due to different load/pressure combinations.

[rovercare]

in a rover with a center diff and CDL (not a viscus) with the cdl unlocked youd eventually over heat the tcase.

in a series nothing

when you lock the center or engage 4x4 it would create huge wind up and break something or at least make the handling very strange.

in something with the viscous center itd frag the viscous in very short order.

No, it wouldn't,I ran 3.54:1 front and 3.5:1 for years, without issue;)