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Series Gearing

Discussion in 'Series Land Rovers' started by landyboots, Jun 24, 2019.

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  1. landyboots

    landyboots Active Member

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    Hi all. Looking for some advice on my series 3 SWB V8. It is fitted with Santana axles and I was told by the vendor that it had an Ashcroft overdrive transfer box at some point. It sits on 33 inch tyres. My problem is that I am not getting very much top speed out of each gear. It runs out of grunt very quickly going through the gears. I suspect that either the ratios of the diffs, transfer box or gearbox along with the tall tyres are causing my woes. Do any of you know if Santana used the same diff ratios as Land rover.....or do any of you run similar setups with a series converted V8?

    Thanking everyone for any input.
     
  2. Colthebrummie

    Colthebrummie Well-Known Member

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    Silly question, I know but it's not stuck in low ratio is it?

    Col
     
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  3. tottot

    tottot Well-Known Member

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    Start with the basics, is the throttle opening fully as you say it run's out of grunt very quickly. [ not a problem with any V8 I have driven. ]
     
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  4. 300bhp/ton

    300bhp/ton Well-Known Member

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    You'll need to provide some numbers, such as what sorts of terminal speeds in each gear. Do you have a tacho/rev counter too?

    How many levers are there? And what positions (photo maybe).

    33" tyres are tall and will make gearing longer, it may have had something done to the gearing to bring this back more inline to stock, but I'm doubting it.

    Have you used low range?
     
  5. landyboots

    landyboots Active Member

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    Throttle is opening fully and it accelerates very rapidly. It just reaches a point to what feels to me like that it peaks early and I have to change gear early to continue picking up speed.
     
  6. landyboots

    landyboots Active Member

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    No. I have checked that by actually putting it into low ratio and experiencing the expected result.
     
  7. landyboots

    landyboots Active Member

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    It is fitted with an aftermarket rev counter. There are 3 levers. The main gear lever and the high/low lever along with the pop up yellow topped lever and they are all working as they should. The red topped lever is pulled back towards the seatbox and the transferbox is in high range.....Thanks.
     
  8. tottot

    tottot Well-Known Member

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    When the red stick is pulled back to the seat box the vehicle will be in low box.
     
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  9. Edlandy

    Edlandy Active Member

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  10. 300bhp/ton

    300bhp/ton Well-Known Member

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    +1
     
  11. landyboots

    landyboots Active Member

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    That's strange because when I push it forward it moves slower with higher revs and definitely feels like low range :(
     
  12. 300bhp/ton

    300bhp/ton Well-Known Member

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    Low range is definitely pulling the read lever towards the seat box. This will also be putting it in 4wd. Obviously we can't tell you if it is working correctly, but it would be might odd to be reversed.

    With the red lever forward towards the engine, it should be in 2wd (rwd). Pushing the yellow lever down should engage 4wd in High Range (for use on slippery surfaces only, not tarmac). To return to 2wd you pull the red lever towards you to engage low range, the yellow lever will jump up when you do this. Moving the red lever forward will return it to 2wd.

    You can check the operation of the red lever, jack up one front wheel with the hand brake off (on level ground, chock the rear wheel). In 2wd you will be able to spin the front wheel. Pull the red lever to put it in 4wd low and you should no longer be able to rotate the front wheel while the other 3 wheels are on the ground.

    N.B. This assumes you haven't got freewheeling front hubs fitted, or if you do that they are locked in.

    There should be a very noticeable difference between high and low range. Low 3rd will give similar performance (spread of speed) to High 1st.
     
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  13. landyboots

    landyboots Active Member

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    Thanks for all of that Info.....Lots to check. I am thinking it could be stuck in low range as there appears to be no difference whether the red lever is forward or back. P.S. You are all spot on with your advice regarding the red lever pushed forward for high range.....sorry for my brainfart moment. :)
     
  14. rob1miles

    rob1miles Well-Known Member

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    Move it backwards and forawrds a few times firmly and make sure you are getting the full travel.
     
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