The original rear diff on my 2001 v6 is listed as TVK100380 (models up to 2A374724) = source microcat 2010.

TVK100180 superseded both TBC100400 and TVK100380 = source lrseries web site

TVK100180 has the larger journal bearing which means it’s stronger = source ashcroft transmissions (bestist transmission company in the galaxy)

The 2001 rave disk ses the final drive ratio’s are as follows:

Td4 engine with manual gearbox 3.182 : 1

Td4 engine with automatic gearbox 2.91 : 1

K1.8 engine 4.200 : 1

KV6 engine 3.66 : 1

The 2001 rave also ses:

Propeller shaft to rear driveshaft ratio 3.214 : 1

Now is the rave disk referring to the “final Drive” as just the drive through the rear diff, or the final drive of the last part of the transmission?

Reason being, if the drive ratios from rave are correct, then that means not all Freelander 1 rear diffs are the same. If they are the same, and we’re talking the later TVK100180 ere I guess, then rave is bollix or refers to final drive as something more than just the ratio of the rear diff.

Could the final drive include the ratio of the output from the IRD? Or something else?

There is an important reason why I’s is asking this. Please keep this fred on topic.

The rear diff ratio's are all the same from all years and all models, the only differenmce is from around 2000-01 the rear diffs had larger bearings fitted to the carrier. This was done due to diff failures which were infact caused by VCU and tyre issues, so infact was completely pointless. Most people want the latter type as they are deemed stronger, but what we have seen is that the later diffs that overheat due to tyre or vcu issues usually destroy the casing as its weaker due to the lesser amount of material in the diff casting sue to the larger bearing.

Ther final drive ratio from the gearbox is different depending on engine type. The IRD ratio is the same apart from the V6 which is different to all other models, although the majority of the IRD is the same, just a couple of gears in there which do this.

Oh, and Ashcrofts are the 2nd best transmission company

Hippo said:

The 2001 rave disk ses the final drive ratio’s are as follows:

Td4 engine with manual gearbox 3.182 : 1

Td4 engine with automatic gearbox 2.91 : 1

K1.8 engine 4.200 : 1

KV6 engine 3.66 : 1

The 2001 rave also ses:

Propeller shaft to rear driveshaft ratio 3.214 : 1

Now is the rave disk referring to the “final Drive” as just the drive through the rear diff, or the final drive of the last part of the transmission?




Could the final drive include the ratio of the output from the IRD? Or something else?

There is an important reason why I’s is asking this. Please keep this fred on topic.

Click to expand...

the term 'diff' or 'differential' refers to the sun and planet gears assembled in a carrier that enables the necessary difference in wheel speeds.

the term 'Final drive' refers to the last gear reduction, ie the crown wheel and pinion housed either in a rear axle (integral with the diff) or in the gearbox on fwd cars.

the front of the freelander is unique in that although the final drive is in the gearbox (essentially a fwd gearbox) the differential bit has been moved into the IRD.

So the ratios quoted for manual and auto are final drive out of those gearboxes before drive enters the IRD

are there figures quoted anywhere for the drive ratio on it's output from the ird?

and the ratio from the output to the front driveshafts?

i realise they will be different ratios for different vehicles, diesel, 1.8 and V6

are there figures quoted anywhere for the drive ratio on it's output from the ird?
and the ratio from the output to the front driveshafts?

Click to expand...

" anywhere " ? ..
no doubt .. been seen before .. here :

Freelander - Intermediate Reduction Drive (IRD) - Land Rover
( .. 'data only applies to MY01' .. )

hd3 said:

" anywhere " ? ..
no doubt .. been seen before .. here :

Freelander - Intermediate Reduction Drive (IRD) - Land Rover
( .. 'data only applies to MY01' .. )

Click to expand...

nice one, i must look on there twice a week and never noticed

I think part of the confusion with the IRD is the name. It doesn't reduce the drive at all the reverse in fact as the the final drive in the gearbox does the reduction. What is in the IRD is the front diff that sends the drive to the front wheels. The diff cage has a spur gear to feed the power to another spur gear which feeds the power up a common shaft onto which is fitted a crown wheel that allows a pinion gear to turn the drive by 90° and gears it up at the same time so the engine power is fed down the propshaft to the rear.

Thanks fer yer comments. Typical of LR not to name thing propper.



















Oh, un ashcroft transmissions is still the bestist. They does jatco auto gearboxes too. :boink:

Hippo said:

Thanks fer yer comments. Typical of LR not to name thing propper.

Click to expand...

What's wrong with Increased Ratio Drive??