1.410 or 1.22 transfer case with 200tdi conversion - Defender Source
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  #1  
Old January 2nd, 2013, 02:23 PM
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1.410 or 1.22 transfer case with 200tdi conversion

Does anyone have personal driving experience in a Defender 110 that has a disco (ratio 1.22) transfer case mated to a 200 or 300 tdi diesel.

Conventional wisdom is that the disco transfer case works good in d90 but the performance is a bit lacking in a 110 with larger tires or a heavy load.

Other option is to stay with the defender transfer case which is 1.410 ratio

I am doing a conversion in the next few months and just looking for people's experience on the options.
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  #2  
Old January 2nd, 2013, 02:28 PM
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Yes. It sucked, but I was trying to turn 35" tires. Swapped over to 1.4 tcase and 4.10 gears and everything is cool now.

At a minimum I would install the 1.4 tcase.
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  #3  
Old January 2nd, 2013, 02:43 PM
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How about 17 or 18 inch tires

Anyone used these with the 1.410 disco transfer case?
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  #4  
Old January 2nd, 2013, 02:49 PM
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Most discos came with 1.2 units, i think.

I have a 200TDi and a 1.2 from a disco. Its tough for passing and up hills BUT, i get great mileage. 30-31MPG except for winter ill get 28-30.

I drive slow in the right lane about 55-65 all the time. So i suits my grandma driving style.


When my 110 isnt my DD any more ill plop in a 1.4
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  #5  
Old January 2nd, 2013, 03:55 PM
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I've had both in my exmod, but with different versions of the LT77.

The 1.2 worked great with the LT77 military box, which has a lower first, second, and 5th than the LT77 version that is intended for use with the 200tdi.

I'm now running a Suffix G LT77 and the 1.4 box (the military box failed behind the 200tdi) and it's nice. I don't think the Suffix G LT77 and the 1.2 would work well with a heavier 5 door though, particularly if you're going to run oversize tires.
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  #6  
Old January 2nd, 2013, 04:24 PM
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I have a 300TDI disco with 33's and 4.10 gears, 1.2 case. Hills suck. I will swap to a 1.4 case when I have the funds and the time. It would be a lot worse with factory diff gearing but its still not right...
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  #7  
Old January 2nd, 2013, 04:44 PM
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I've had both setups
(200TDi w/LT77 and 1.4 T-Case) - always seems ready to spool up and pull with ease you could start in 2nd gear easily and it would pull through soft sand in 1st gear at idle. The highway was a different matter though. It did not like anything over 60mph.

(300TDi w/R380 and 1.22 T-Case from a RRC) - not quite what I'd want if I were off-road all the time, but it's great on the highway and easily pulls 70-75mph without feeling like it's working at all. Granted some hills with headwind on the highway are slow in 5th gear and some hills on backroads require 3rd occassionally when you'd think 4th would be fine. I often resort to low range when in softer sand (the low range in both 1.2 & 1.4 T-cases are the same if I'm not mistaken).

Depends on your application. Given my driving habits, the current setup suits me well, but if I were going to be doing more off-roading I'd run with a 1.4 case.

Oh, I'm running 265/75/16 KM1 Mud Terrains.
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  #8  
Old January 2nd, 2013, 06:01 PM
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Cabell drives a 110 pickup with lift, winch bumper and 33's and disco 200 tdi running into an early lt77 (not an S) and a 1.2 transfer case. He loves it. That said his truck is very light. I would run a 1.4 with a 5 door.
I have a 1.2 in my 130 crew cab right now and have 35's on it. I can't use 5th gear until I'm already going 70.
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  #9  
Old January 2nd, 2013, 06:24 PM
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Engine Matters

For 5 years drove a 110 5-door, 300TDI, R380 and 1.4 TC with stock wheels (235 85 16 tires). This was the best gearing for this vehicle. Don't think this would have been a good candidate for a 1.2 TC.

Years ago also bought a 110 5-door, 200TDI, LT77 and 1.4 TC also with stock wheels (235 85 16 tires) that I drove for a while. For some reason this was the fastest TDI I have ever driven, it would go easily 85 MPH with very little petal. The T-case developed a heavy oil leak a few days before a new owner was flying in to pick it up. Installed a 1.2 TC and it was even better to drive. The engine must have been tuned up because it was so fast.

So as a general rule the 1.4 is the better option for a 5 door.
With the 1.2 being common here in USA, why not kit out initially with a 1.4 and if you think your engine can pull the 1.2 then you can always swap. It gives you some growing room for a bigger intercooler or playing with boost & fuel settings (although you can do that independent of gearing).

Our Mercedes 110 has a 1.6 TC and was thinking of jumping to the 1.2 only because it's a lighter pickup and am playing with the boost and fuel on the engine. If it were a 5-Door would stay at 1.4 unless it was improved to put out even more power.
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  #10  
Old January 3rd, 2013, 10:22 AM
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I'm running stock wheels with a 300 Tdi and a 1.2 Tcase. As Jackie said, it's great on the freeway and given how many miles I put on it (over 40 k in two years), it suits me well. It'll run 65 all day without issue, although at that speed I get 25 MPG in the summer and low 20s in the winter. If I drop it to 55 I'll get upper 20s. Never seen 30 as seen by Peyton, not even through flat Indiana doing 55.
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  #11  
Old January 3rd, 2013, 11:12 AM
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I tried them all on my 110 200tdi. Best option is 1.4 imho. 1.6 is too short (but pulls like a train!) and the 1.2 is good only on highways. Low fuel cost as the engine is not reving much but overall, it was not as good and natural feel as the 1.4. And on mountain road it's too long between the gear. once you get to shift upspeed, you need to change down as the power curb is too far away. The tires are 750x16.
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  #12  
Old January 3rd, 2013, 12:10 PM
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I too am running stock wheels with a 300 Tdi with a R380 GB and a 1.2 T case. As Jackie and Michael said, it's great on the freeway and the Autobahns when I was living in Germany. It runs 75-80 mph all day long in the flats and returns 20-30 mpg. Here in Colorado it's not quite optimal, especially in the hills where I'm constantly shifting to find the ever elusive sweet spot. Before going to oversized tires I'll probably go with a 1.4 T case.
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  #13  
Old January 3rd, 2013, 12:56 PM
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thanks for your feedback

As always thanks for all your feedback. it is invaluable for making decisions



Alaska Rockhound
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  #14  
Old January 3rd, 2013, 02:29 PM
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As a few others have said, it really depends on what you are using the 110 for. I have a 1.2 transfer box on my 300Tdi 110, swapped it in in favour of the stock 1.4 I had originally. I am on 235 85 16 tyres. The 1.2 works fine with the 110 in my view, but you do have to adapt to it. If you are using the 110 as your daily driver, or driving at highway speeds a lot of the time, and/or live in a relatively flat area, the 1.2 is the best. In a hilly area, I can see that 1.4 would be better. But the noise from the 1.4 at highway speeds is very tiresome, you can't listen to music or even have a decent conversation with the front passenger without shouting. So 1.4 is good for around town pootling and hilly areas. As noted already, the low range gearing is the same for both, so don't reject the 1.2 just because you want to go wheeling with the 110 - you're going to be in low range anyway when you do that.

I did eventually find the lack of low down grunt a bit irritating after a while so I addressed this in other ways: tweaking the fuel pump and installing the VNT turbo kit, which virtually wiped out turbo lag. A 1.2 combined with a VNT turbo is in my view ideal for a 110.

Cheers,
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  #15  
Old January 3rd, 2013, 04:57 PM
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Is there anyone with an overdrive (GKN or some' like)? Guest it would be the perfect set-up for 1.4 or 1.6 for that matter!
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  #16  
Old January 7th, 2013, 09:14 PM
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Quote:
Originally Posted by CDNRover View Post
Is there anyone with an overdrive (GKN or some' like)? Guest it would be the perfect set-up for 1.4 or 1.6 for that matter!
I have the GKN on a Td5 and 1.4. Great for highway speeds. 70mph @ 2200 rpm.
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  #17  
Old January 8th, 2013, 07:28 AM
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I have a 90 with 300tdi/R380 /1:4 tcase / 4:10 gears and 33"Mts. Drives very well although I'd say first is a little low and second can be used for most starts. Cruises on the hwy really nicely. Wanted the low first as this one is used for launching a boat in a particular place that is challenging.

Side note. The fawkin GKN OD has never stopped leaking no matter what the remedy.
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  #18  
Old January 8th, 2013, 11:14 AM
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I have a brand new GKN I need to install on mine.
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  #19  
Old January 8th, 2013, 11:41 AM
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Had some issues with my GKN but got them all solved.
Devon 4x4 in the UK have all the parts you need and they will give you solutions for common problems like leaks.
I was having issues with the speed sensors failing and got tired of paying £150 for them. So found a source here in the US for only $34.

https://store.redlion.net/store/come...idProduct=1684
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  #20  
Old January 8th, 2013, 01:15 PM
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I really like the 1.22 on my 110 5 door 200tdi and 235/86R16's. Yes you have to change down for some hills but you can go faster in each gear. The injection pump is standard set-up.
Also had a GKN overdrive... put up with it not working very well at all for one trip to Morocco, removed it when it totally failed on the way home and then sold it on at an auto jumble for what I'd given for it in the first place. I'd never fit one again. I find the 1.22 transfer box much more useable on the road than the overdrive ever was.
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