Landrover engine/box compatibility

I'm sure there must be a definitive guide to landrover engine and gearbox compatibility somewhere on the internet, but I bloody well can't find it!

As far as I know (and have guessed). the LT77 and LT85 (basicly the same but stronger?) have the same bolt paten as the series (4 cylinder) gearboxes and will bolt straight onto the back of 2.25 2.5 2.5TD and 200Tdi. Where as the R380 will only bolt onto the 300Tdi?? I'm ignoring V8s and TD5s etc!

I'm asking this as I'd very much like to bolt a 300Tdi from a Disco onto a LT77 or LT85...

Thanks! Toby

Reply to
TVS
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Hi Toby,

I am sure that an R380 will go onto a 2.5tdi

A

Reply to
Andrew Renshaw

In the summer I helped my mate to put a 5 speed gearbox from a 90 (2.5TD) onto a 2.25 petrol engine. So they definately fot together!

Works our about the same price as getting an overdrive for a standard series box (excluding any other costs such as props), and works a lot nicer.

Reply to
Tom Woods

Apart from the problems associated with running a Series front axle on a permanant 4wd xfer box.

Alex

Reply to
Alex

I was excluding those costs too :) Is it possible to make a 90 box into selectable 4x4?

Reply to
Tom Woods

Alex, there's virtually no problem unless you select diff lock. I've seen and driven quite a few, including 109V8 that have had this done (or in the case of the V8, a normal axle (and rr diff) fitted to replace the worn-out and very expensive special cv shafts). You "may" experience a slight feedback through the steering at low speed/full lock, but lets face it, if you're going slow enough to be on full lock in the first place then it ain't no problem, is it? Badger. B.H.Engineering, Rover V8 engine specialists.

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Reply to
Badger

What problems would those be then?

Steve

Reply to
Steve

You can experience premature wear of the UJ's in the front axle. That said, as somebody else has pointed out, it could be many thousands of miles before this happens, and the UJ's are fairly cheap to replace anyway. Depends if you're willing to spend out on the cost and trouble of finding a Stage1 109V8 front axle, or fitting RR axles in the first place.

Up to you, but you should be aware of the potential problem before you make a decision. Personally I'd be quite happy to do it, and prepared to put up with the occasional replacement of the UJ's

Alex

Reply to
Alex

Does the 101 front axle have CV's in it?

Reply to
Tom Woods

yes, use the early 110 4 cylinder LT230 with selectable 2/4wd. VERY rare. Badger.

Reply to
Badger

Yes... I think they were borrowed from a B52 parts bin though and unlikey to fit a series unless you use them as rims and bung the tyres on them too ;-)

Lee D

Reply to
Lee_D

Or bung on some FWH's... not ideal but then hey!

Lee D

Reply to
Lee_D

Well how do the wheels steer if there aren't any CVs? I guess the debate then becomes are the CVs part of the hub or the axle...

Reply to
Dave Liquorice

The real reason for using CV joints with permananent four wheel drive has nothing directly to do with wear.

Unlike constant velocity(CV) joints, UJs do not exhibit an output velocity that directly follows in the input. Whilst pairs of UJs can be installed in a manner that largely overcomes this effect (as on a front or rear propshaft) the single UJ used in a front hub can not. Such lack of constant velocity was considered to be inappropriate for permanant on-road use hence the use of CV joints.

Many will 'happily' live with a front end UJ installation and the UJ life will in most circumstances not disappoint. In a vehicle such as the Land Rover the additional vibration generated is usually well concealed amongst the others! In part-time four wheel drive or off-road use it's not an issue.

Reply to
Dougal

I meant CV's as opposed to UJ's

Reply to
Tom Woods

Yes, it has CVs. Part of shaft assemblies 593838 and 593839.

Reply to
Dougal

Whats the chances of finding one of these nowadays? Wating to see if one turns up on ebay is just a bit too hit and miss if I where to be planing on using one in a project! Thanks! Toby

Reply to
TVS

Something to do with non-constant output velocity of the halfshaft fighting the somewhat more constant velocity of the roadwheel and thus putting higher stress levels on the UJ, which would result in premature wear... oh sorry I appear to have shot your original statement down in flames.....

Alex

Reply to
Alex

I wouldn't say flames... The front and centre diffs alow the front UJs to run at a diferent speed to each other and the rear prop shaft. So the slight variation in half shaft speed, which will be nessesary to result in a constant roar wheel speed, will be alowed for when the front wheels are turned to steer around a bend. At full lock, when the variation in velocity will be at its greatest, the sensation could be described as judder though the steering wheel. This rapid change of acceleration will increase wear on the UJs but I sertainly woudln't sujest it would cause noticiably premature wear under normal driving conditions. Toby

Reply to
TVS

Should I retain the original series front axle(with UJ's), would front free-wheel-hubs do any good ? And what about the ratio, knowing the LT230 differs from the Series X-box ?

Hertriono Kartowisastro

TVS wrote:

permanant

Reply to
rovieman

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