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Thread: whats the difference?

  1. 2nd May 2010, 09:07 AM #1
    blitz
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    whats the difference?

    What is the difference between a series I discovery transfer case and a defender transfer case?

    Is it stronger?

    does it have different gearing?

    I see the odd comment about fitting one to a discovery/RR, and would like to know what the difference is to weigh up the odds of fitting one?
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  2. 2nd May 2010, 09:10 AM #2
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    dmdigital
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    Defender one has a lower ratio.
    MY15 Discovery 4 SE SDV6

    Past: 97 D1 Tdi, 03 D2a Td5, 08 Kimberley Kamper, 08 Defender 110 TDCi, 99 Defender 110 300Tdi[/SIZE]
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  3. 2nd May 2010, 09:11 AM #3
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    BigJon
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    Defender transfer case has a lower high range gear set. Low range is the same.
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  4. 2nd May 2010, 09:23 AM #4
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    Disco 1.22:1 Defender 1.4:1 high range, both low ranges are the same 3.32:1
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  5. 2nd May 2010, 09:46 AM #5
    blitz
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    so if I am going to 315/70/16 tyres if I went to the defender transfer case would I still need to get 4.11 crown wheel and pinions?
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  6. 2nd May 2010, 09:57 AM #6
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    Hardchina
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    Only if you're concerned about low range gearing. just doing the tc will only alter high range.

    What size are the tyres in old school measurements?
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  7. 2nd May 2010, 03:04 PM #7
    blitz
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    315/70/16 are the same as 35 x about 12 x 16" tyres
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  8. 2nd May 2010, 05:22 PM #8
    Bush65
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    Besides the high range ratio mentioned, late disco I transfer cases are LT230Q, vs LT230T (earlier disco I and defender).

    IMHO the smaller teeth on the LT230Q gears will make them weaker (assuming everything else such as material is the same).
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  9. 2nd May 2010, 05:48 PM #9
    blitz
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    Quote Originally Posted by Bush65 View Post
    Besides the high range ratio mentioned, late disco I transfer cases are LT230Q, vs LT230T (earlier disco I and defender).

    IMHO the smaller teeth on the LT230Q gears will make them weaker (assuming everything else such as material is the same).
    As I own a 94 change over model I will assume I have the stronger case, is the strength of compenents between the defender and the disco in the early jobbies the same?
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  10. 2nd May 2010, 06:18 PM #10
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    Hardchina
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    Quote Originally Posted by Bush65 View Post
    Besides the high range ratio mentioned, late disco I transfer cases are LT230Q, vs LT230T (earlier disco I and defender).

    IMHO the smaller teeth on the LT230Q gears will make them weaker (assuming everything else such as material is the same).

    Has anyone ever broken teeth or anything else on a disco Q transfer?
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