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  #1  
Old October 11th, 2016, 01:13 PM
Tyler Wirken
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School me on transfer boxes

Yet again I can't seem to search this forum well to save my life.

I need some quick lessons on the LT230

As you may have seen in my other thread I found some damage in my t-case and need to replace it.

I have found some used ones locally which is nice not only for the price but don't have to worry about shipping one.

My questions are.

1- mileage- all are over 100K miles. Should this be an issue? What actually wears out in these t-cases etc...? Any issues buying one with 128,000 miles and just replacing the seals and getting back to life?

2- I thought I read some DII cases are quieter. Perhaps different gears etc....? is this true? If so what years are best for DII cases? I know '01 and '02 are no good as they don't have diff lock. But otherwise what would be ideal?

These are my option thus far-

1997- out of an SD Disco- 128,000 miles $175.00
1999- out of a DII- 150,000 miles- $99.95
1999- 130K - $300-
1997- 147K- $150-
2000- DII mileage unkown- $80- at a local UPULL- engine fire. Not interested in pulling a case though.

Thanks for your thoughts.





Thanks!
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  #2  
Old October 11th, 2016, 01:19 PM
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David Frank
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I bought a rebuilt/sealed lt230 "Q" case from a member in SoCal for a couple hundred. The later "Q" cases are quieter. And rebuilt means built twice in my book, so I feel like mileage is less of a factor unless you're just going to drop it in as-is. All I know. Good luck with your hunt.
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  #3  
Old October 11th, 2016, 01:28 PM
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I'd go with the d1 box and make sure to secure the linkage.
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  #4  
Old October 11th, 2016, 01:37 PM
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Q switch over was mid 97 I want to say. Get a D1 case for $150. Replace the input and output seals and call it a day (remove the interlock solinoid if you have a manual trans).

What wears is bearings if they run out of oil. Or diffs blow if they are seriously abused.
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  #5  
Old October 11th, 2016, 02:29 PM
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Quote:
Originally Posted by evilfij View Post
What wears is bearings if they run out of oil. Or diffs blow if they are seriously abused.
And Input Gear Splines..
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  #6  
Old October 11th, 2016, 02:57 PM
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Originally Posted by LRNAD90 View Post
And Input Gear Splines..
Non-issue post 96 or so.
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  #7  
Old October 11th, 2016, 03:01 PM
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Quote:
Originally Posted by evilfij View Post
Non-issue post 96 or so.
I think LR started fitting the cross drilled input gears in 1997, but personally I'd be cautious of the '97 cases none-the-less and check to make sure. Easy enough to inspect with the case out of the truck, probably don't even need a flashlight..
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  #8  
Old October 11th, 2016, 03:37 PM
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Fair point. Can't hurt to check.
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  #9  
Old October 11th, 2016, 04:14 PM
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so which cases were the quieter ones? I'll take all the quiet I can get. need to know what to look for.
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  #10  
Old October 11th, 2016, 04:55 PM
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Quote:
Originally Posted by Overlander View Post
so which cases were the quieter ones? I'll take all the quiet I can get. need to know what to look for.
LT230Q was fitted to Td5 Defenders onward, and is slightly quieter in operation (hence the Q) thanks to different gear geometry, more teeth on the gears, and improved bearings.

Nice little overview of the LT230 series Transfer cases..
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  #11  
Old October 11th, 2016, 07:44 PM
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Quote:
Originally Posted by LRNAD90 View Post

LT230Q was fitted to Td5 Defenders onward, and is slightly quieter in operation (hence the Q) thanks to different gear geometry, more teeth on the gears, and improved bearings.

Nice little overview of the LT230 series Transfer cases..
Good info! Any surprises on fitting one to an older defender like mine?
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  #12  
Old October 11th, 2016, 11:45 PM
Tyler Wirken
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Thanks for the feedback.

Found this online-

LT230Q- boxes
Serial number- Prefix- 36D 37D- Discovery
" "- 38D 40D- Defender

Now to figure out what years that might be.

Found this as well which I find a little confusing.
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  #13  
Old October 12th, 2016, 12:19 AM
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Is anyone going to speak to different gearbox ratios?

http://www.defendersource.com/forum/...case-8531.html

The factory overhaul manual. Save as .pdf.

http://www.landroverresource.com/doc...Box_Manual.pdf

Ashcroft Transmissions

http://www.goffy.com/rrr/transfer/41_06_95_en.pdf


LT230 TRANSFER BOX | Land Rover Monthly



LT 230 Serial Numbers

12D = 1.667, 13D = 1.410, 14D = 1.003, 15D = 1.192, 20D = 1.667, 22D = 1.410, 25D = 1.410, 26D = 1.003, 27D = 1.192, 28D = 1.222, 29D = 1.192, 32D = 1.222, 36D = 1.211, 38D = 1.211, 40D = 1.211, 41D= 1.211, 43D = 1.410, 47D = 1.667, 57D = 1.410, 59D = 1.211, 61D = 1.211, 62D = 1.211, 68D = 1.211, 69D = 1.211, 70D = 1.211
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  #14  
Old October 12th, 2016, 06:27 AM
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Quote:
Originally Posted by KGH View Post
Is anyone going to speak to different gearbox ratios? http://www.defendersource.com/forum/...case-8531.html The factory overhaul manual. Save as .pdf. http://www.landroverresource.com/doc...Box_Manual.pdf Ashcroft Transmissions http://www.goffy.com/rrr/transfer/41_06_95_en.pdf LT230 TRANSFER BOX | Land Rover Monthly LT 230 Serial Numbers 12D = 1.667, 13D = 1.410, 14D = 1.003, 15D = 1.192, 20D = 1.667, 22D = 1.410, 25D = 1.410, 26D = 1.003, 27D = 1.192, 28D = 1.222, 29D = 1.192, 32D = 1.222, 36D = 1.211, 38D = 1.211, 40D = 1.211, 41D= 1.211, 43D = 1.410, 47D = 1.667, 57D = 1.410, 59D = 1.211, 61D = 1.211, 62D = 1.211, 68D = 1.211, 69D = 1.211, 70D = 1.211
Almost everything US spec is 1.2 so no one really mentions it. Only the NAS 110 got 1.4.
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  #15  
Old October 12th, 2016, 01:13 PM
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Guys

In the US the 1997 Disco had a bunch of mid year changes, including the evap system and the switch to fully splined transmission output shaft and new LT230Q transfer case.


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  #16  
Old October 12th, 2016, 01:27 PM
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Quote:
Originally Posted by Overlander View Post
Good info! Any surprises on fitting one to an older defender like mine?
I swapped in a Q last summer into my D1, believe the donor was out of a Dii-with that in mind you probably want to have your old box sitting side by side the new one as you make the swap. You may find that you want to move over components (plates, housings) to retain aspects like dif lock, senors (or lack thereof), etc.

No big surprises, just the usual every tool in the garage somehow ended up getting used job.

The Q is def a nice upgrade.
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  #17  
Old October 12th, 2016, 02:12 PM
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Originally Posted by evilfij View Post
Almost everything US spec is 1.2 so no one really mentions it. Only the NAS 110 got 1.4.
damn, I am getting Eurofied.
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  #18  
Old October 12th, 2016, 02:52 PM
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Quote:
Originally Posted by Overlander View Post
Good info! Any surprises on fitting one to an older defender like mine?
Didn't you already get a Q box from me??

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  #19  
Old October 12th, 2016, 03:28 PM
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Originally Posted by crown14 View Post
Didn't you already get a Q box from me??

Sent from my SAMSUNG-SM-N920A using Tapatalk
I need to check the suffix. Cant remember. I know it was from an RRC
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  #20  
Old October 12th, 2016, 04:07 PM
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Quote:
Originally Posted by Tyler Wirken View Post
Yet again I can't seem to search this forum well to save my life.

I need some quick lessons on the LT230

As you may have seen in my other thread I found some damage in my t-case and need to replace it.

I have found some used ones locally which is nice not only for the price but don't have to worry about shipping one.

My questions are.

1- mileage- all are over 100K miles. Should this be an issue? What actually wears out in these t-cases etc...? Any issues buying one with 128,000 miles and just replacing the seals and getting back to life?

2- I thought I read some DII cases are quieter. Perhaps different gears etc....? is this true? If so what years are best for DII cases? I know '01 and '02 are no good as they don't have diff lock. But otherwise what would be ideal?

These are my option thus far-

1997- out of an SD Disco- 128,000 miles $175.00
1999- out of a DII- 150,000 miles- $99.95
1999- 130K - $300-
1997- 147K- $150-
2000- DII mileage unkown- $80- at a local UPULL- engine fire. Not interested in pulling a case though.

Thanks for your thoughts.
Thanks!
What about the serial number of your damaged LT230?
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