Thread: Defender transfer case gear up 1.41. to 1.22

Make sure that disco 2 transfer case has a centre diff lock?, i fitted the whole disco transfer case to my 95 110 after converting to auto, no regrets here

Originally Posted by simmo

My apologies gentlemen and ladies, I did try a search on this "transfer case gears", but couldn't find anything on it.
I'll be fitting a Mad Man VNT turbo kit in June, and looking at the torque curves I'm going to have a lot of extra torque up to 3000 rpm, so I want more relaxed cruising at 100 km/hr. I toyed with the idea of a roverdrive overdrive , but it's expensive & and added complication. I 've read somewhere, I think quite few of you have changed your TC gears to the higher ratio 1.22, from the discos.
I'd like to do the same, did you just change the gears or did you change the whole T box? My preference is to change the whole box. Another member has a T-C from a disco 2 for sale. has anyone a similar experience using the disco 2 transfer case? I figure we could have a quick look inside at the center diff to makes make it's Ok. and them put it straight in.
Its amazing how the project has budget "creep" or " growth". but after 15 years I don't mind spending a bit on her. say $2200 for the kit landed, xxx$$ for the transfer case + labor fitted, $600 for some exhaust mods. ( it will be the car the TDi should have been by 1995 ). My guess is we're going to not have a lot of beer money left from $4000. But for me It's good to have an offroad car you can use and not loose sleep over dirt, water, dust etc.
So I appreciate your advice about the project, I''l keep you updated about how the budget is going. cheers simmo.

my thoughts are ,
you need torque after cruising speed to manage slight inclines etc. it not a racing car where you gear to max HP

a VNT is not going to add oodles of power. add to that the turbo will only be adding power as you add fuel. so a cruse she will not be producing what you map is saying, that’s hammer down stuff.

on the other hand. Staying in 5th gear is not smart for a 380, dropping down to 4th is smart

300 tdi have enough problems in first gear when loaded. You will be moving that up as well

Agree with 85 County. I have the 2.8gtv engine in my 110 tray back. No way would I go taller high range. And yes I do run stock diff gears and stock size tyres.

a VNT is not going to add oodles of power. add to that the turbo will only be adding power as you add fuel. so a cruse she will not be producing what you map is saying, that’s hammer down stuff.

The proposed TC has a a center difflock-TKs.
The real attraction for me is the reduction in revs from about 3200 to 2800 at 100 kms /hr. Should be quieter and better fuel consumption.

I take your point about 1st gear is under more load, it's something I have to keep in mind, I usually change to low range if a lot of torque is required in 1 st gear. I've heard rumor about a weakness of 5th gear, but I towed a trailer with a series one for a few hundred kilometers on a about 40 deg day. Having said that I have a transmission cooler in my garage to fit thanks for your advice simmo

I went to 1.22 from 1.41 and it's much more pleasant at cruising speeds. I swapped the whole TC because I was lucky to get one as a spare when I bought the 130.
I have a Garrett VNT, Alisport intercooler and Alisport radiator. Admittedly, mine is fuelled up quite a bit, but it will accelerate up those long inclines in 5th gear rather than struggling up them.

Cheers, Murray

Originally Posted by rijidij

but it will accelerate up those long inclines in 5th gear rather than struggling up them.

Cheers, Murray

now why would you want do risk that??

I have a TD5 110 Defender which I had converted to 1.2 ratio using the kit from Ashcroft's.The independent Land Rover mob that did the conversion had three goes at it before they got it right[had to call in the local expert Maurie Urquhat]Even then they baulked at fitting the one piece cross pin.If I did it again would definitely look for a Disco2 box with diff lock.Make sure you change all the oil seals and the intermediate gear O ring before fitting.
The higher gear makes for easier touring,quieter/better fuel economy.I have not towed with mine but it could possibly involve more revs when moving off,especially with a 300tdi.

It's horses for courses , we put a disco T'case in our 110 300TDI and it goes well on the road , lightly loaded , but struggles with weight .
I would not put one in my 300TDI 130 work ute , even though it has an Alisport VNT & intercooler & fueled up .