Thought you guys might get a kick out of this - Cummins swap

[hks3sgte]

I think is the L230 case. Also known as a poor man's Atlas. It has a center diff and a huge parking brake. That combo allows you to spin the front wheels only for tight spots. They come with various ratios, mostly around 3:1 high and 1.2-1.4 :1 low range. Use this with 3.7 gears and 35" tire and you've got a very dependable setup. I've toyed with the idea of mating one to and H55 for years but just have never gotten around to it. They are very easy to join to a Turbo 350

It's actually a Land Rover box... very good transfer case.

http://www.roverunited.com/tech/land-rover-lt-230-transfer-case/land-rover-lt-230-conversion.htm

 

[Fromage]

I think is the L230 case. Also known as a poor man's Atlas. It has a center diff and a huge parking brake. That combo allows you to spin the front wheels only for tight spots. They come with various ratios, mostly around 3:1 high and 1.2-1.4 :1 low range. Use this with 3.7 gears and 35" tire and you've got a very dependable setup. I've toyed with the idea of mating one to and H55 for years but just have never gotten around to it. They are very easy to join to a Turbo 350

Wow Bruce, yes. LT230. The center diff is pretty weak unless you upgrade the cross shafts (they are 2 pieces but aftermarket 1 piece forgings are available). Most people (including me) convert it to part time use for heavy duty apps. Low range is always 3.32. High range varies from 1.003, 1.22, 1.4, 1.6. Rover only ever offered 3.54 as a diff ratio with the LT230 so they had to make up for the weight of 130 and 110 vehicles by offering a lower high range at the T case. Obviously the higher high range T cases are better as a 1.6 case isn't that different gearing wise than a Toy split case or an NP205.

There is a factory TF727 to LT230 adapter available, used in early range rovers which used an IH version of the TF727. Rare in NA. Aftermarket adapters are available for TH350 and I hear of an NV4500 adapter coming from AA, but there are homebrew ones out there. The T case has a fully supported input gear so the input shaft does not see any axial load, all you need is a spud shaft and an adapter plate. My adapter cost 50$ to make.

The parking brake is great as it makes disc brake conversions a lot easier. No need for those junk eldorado calipers. I use minitruck front calipers on the rear. Unlike the earlier series trucks, the LT230 drum brake parking brake will hold any hill. I set it and jump out, never a second thought.

Not to toot my own horn but I thinh that Toy axles and an LT230 are a great combination. I am not a fan of the split case as it's kind of a pain to service and it does not have the gearing that most people want.

I am trying to take this rig to AK for the 08 trek. It's a dream and my BJ60 is too stock for that trip, but it is 8000 kms one way. I would probably lose my hearing.

 

[Tapage]

High range varies from 1.003, 1.22, 1.4, 1.6.

Nice Low .. how to rcognice the Hi gearing variation on the external case .?

 

[Aaron]

Really nice build.

Any updates/pics on how it's working out.

--Aaron

 

[lshobie]

I saw this truck last week, it is awsome, he did a great job on it!

 

[Dougal]

Wow Bruce, yes. LT230. The center diff is pretty weak unless you upgrade the cross shafts (they are 2 pieces but aftermarket 1 piece forgings are available). Most people (including me) convert it to part time use for heavy duty apps. Low range is always 3.32. High range varies from 1.003, 1.22, 1.4, 1.6. Rover only ever offered 3.54 as a diff ratio with the LT230 so they had to make up for the weight of 130 and 110 vehicles by offering a lower high range at the T case. Obviously the higher high range T cases are better as a 1.6 case isn't that different gearing wise than a Toy split case or an NP205.

There is a factory TF727 to LT230 adapter available, used in early range rovers which used an IH version of the TF727. Rare in NA. Aftermarket adapters are available for TH350 and I hear of an NV4500 adapter coming from AA, but there are homebrew ones out there. The T case has a fully supported input gear so the input shaft does not see any axial load, all you need is a spud shaft and an adapter plate. My adapter cost 50$ to make.

The parking brake is great as it makes disc brake conversions a lot easier. No need for those junk eldorado calipers. I use minitruck front calipers on the rear. Unlike the earlier series trucks, the LT230 drum brake parking brake will hold any hill. I set it and jump out, never a second thought.

Not to toot my own horn but I thinh that Toy axles and an LT230 are a great combination. I am not a fan of the split case as it's kind of a pain to service and it does not have the gearing that most people want.

I am trying to take this rig to AK for the 08 trek. It's a dream and my BJ60 is too stock for that trip, but it is 8000 kms one way. I would probably lose my hearing.

I have a high ratio (1.003:1) LT230 in my truck.
Both outputs on all LT230's are on the RHS of the truck.

The high ratio ones are rare, they are only found in two vehicles, one is the Aussie landrovers with the Isuzu 4BD1 engine, the other is the 1983-1985 rangerover with the 3sp auto (TF727). All other rangerover or discovery LT230's are 1.2:1 high ratio, defenders are 1.4:1 high ratio.

I picked up mine with the TF727, I still have the TF727 for sale complete with the adaptors to fit the LT230 if anyone wants it. The TF727 I have does not have a torque converter.