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Thread: wrong ratio. Not happy jan.

  1. 25th May 2008, 04:48 PM #1
    willvine Guest

    wrong ratio. Not happy jan.

    Hey guys. I finished putting my new diff in the series 3 LWB but when i checked the ratio while jacked up it was not the same as the rear. Unfortunatly i diddn't count the crown and pinion teeth before I put it in which is my fault. But i have just wasted half a sunday doing it The crap thing is I had to send my old one in for exchange which was a 4:7:1 and they sent me a 4:6:1. MY question is.. what series 3 had a 4:6:1 ratio in it. maybe a 6 cylinder? as mine is a 4 deisel.

    Also there are some numbers stamped on the crown and pinion which are.


    9129 on the one they sent me and...

    6510 on the one i had in it.

    what do these numbers mean as they dont represent the ratio.

    Thanks for the rant.

    Will.
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  2. 25th May 2008, 05:03 PM #2
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    djam1
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    Will
    All Series 3 except the Stage 1 had 4.7:1 diff ratios all Stage 1/County Defenders/ Range Rovers and Discos had 3.54:1 excepting the Army 6x6 they too had 4.7:1.
    I think there was a 4.6:1 ratio in some of the old Rover cars but they would be pretty rare
    How do you conclude that it is 4.6:1
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  3. 25th May 2008, 05:13 PM #3
    willvine Guest
    I counted 46 teeth on the crown and 13 teeth on the pinion, so I was told you just drop the last digit on the pinion and call it 4:6:1.

    Cheers.
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  4. 25th May 2008, 05:24 PM #4
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    djam1
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    Will
    I just went out and looked at my spare and a 3.54:1 had 13x46 so someone has sent you a Range Rover diff by the sound of it
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  5. 25th May 2008, 05:43 PM #5
    willvine Guest
    Thanks for that. I did think it was for a V8 or some thing with more guts that a 2.25 diesle.

    I will just have to send it back and have a winge .

    cheers.
    Will.
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  6. 25th May 2008, 05:55 PM #6
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    Disco_owner
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    46 teeth on crown and 13 teeth on pinion is a 3.54 46/13=3.53846=3.54

    regards

    khos
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  7. 25th May 2008, 06:01 PM #7
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    Slunnie
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    Hey Will,

    The 3.54 was out of the Stage1 Series 3 which was the V8 or Isuzu powered ones. Was it just the diff or the whole axle that you changed? If it was the whole axle you may want to just change the diff part back to 4.7 as the axles/CV's are stronger.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
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  8. 25th May 2008, 06:36 PM #8
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    p38arover
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    Depending on what motor you have, you might be well off. Fit a 3.54 to the other end. That's what I want for my Holden 202 powered IIA
    Ron B.
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  9. 25th May 2008, 07:01 PM #9
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    Cheers
    Slunnie


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  10. 25th May 2008, 07:10 PM #10
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    Quote Originally Posted by Slunnie View Post
    2.25 diesel

    Ooops!


    Well, a 3.54 might be a tad tall for a 2.25 diesel!
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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