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#Post#: 83400--------------------------------------------------
Gearing
DIR By: markgriff
Date: January 5, 2014, 3:24 pm
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hi, I am new to the forum, and have read some of the older posts
on this subject, but I still feel that I want to make a change.
I ve got a 81 series 3 swb with a nice running 2.25 petrol,
fitted with a turner performance head and rebuilt zenith carb.
I don t plan any heavy use or towing, and its running 205/16 AT
tyres. I am thinking about going for a high ratio transfer box,
as I live in a hilly area and winter snow can be quite bad,
hence low ratio. But normal driving I want to reduce rpm.
do people with experience think this is the way to go. Any
advice welcome.
#Post#: 83401--------------------------------------------------
Re: Gearing
DIR By: NoelC
Date: January 5, 2014, 3:41 pm
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An overdrive really is the best option. Granted my 88 is on
large rubber (255/85R16) but even with a 2.5 petrol, stage 2
head, ACR SU carb etc I wouldn't want the overdrive in all the
time which effectively what a high ratio transfer would give
you.
#Post#: 83402--------------------------------------------------
Re: Gearing
DIR By: nannaness
Date: January 5, 2014, 3:42 pm
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--- Quote from: markgriff link ---
>
> I am thinking about going for a high ratio transfer
box.......................
> ,
> as I live in a hilly area and winter snow can be quite bad,
hence low ratio. But normal driving I want to reduce rpm.
>
>
--- End Quote ---
You need an overdrive not a high ratio transfer box
wagfinger
#Post#: 83403--------------------------------------------------
Re: Gearing
DIR By: prof-pat-pending
Date: January 5, 2014, 3:45 pm
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you could try 7.50 tyres - they would increase the gearing
slightly - and you could borrow them from some one just to try
next there is the higher ratio diffs from an older range rover -
up gearing again but it does also affect low box
also worth a look is an overdrive - depends on budget of course
- this option does not affect low box
that should give you a few ideas - or until a grown up comes by
with a real answer :smilewide:
#Post#: 83405--------------------------------------------------
Re: Gearing
DIR By: Albert Ross
Date: January 5, 2014, 4:32 pm
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By using a high ratio final drive, you spend more time in lower
gears, and wearing the gearbox/shafts/bearings out.... which is
a lot more costly than fuel or earplugs.
#Post#: 83438--------------------------------------------------
Re: Gearing
DIR By: divie
Date: January 6, 2014, 1:27 pm
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Been there with the 3.54 diffs, now back on 4.7s. Rover
engineers knew what they where doing. Overdrive only way to go.
With the price of used overdrives getting scary for an unknown
moneypit a new "Roverdrive" is getting within realms of sense
but only if you do big miles. Me I would not bugger about with
it.
#Post#: 83464--------------------------------------------------
Re: Gearing
DIR By: Doug_T
Date: January 7, 2014, 2:39 am
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I'll echo the 7.50 tyres and / or overdrive route. It's also
worth remembering - particularly with the statement about the
"factory knowing best" - that, 5th gear aside, even the later
boingies (pre the 6 speed contraptions) do not have gearing that
is too dissimilar to that of the Series. Certainly the final
drive of 3.54 is higher, but they have a lower ratio in the
transfer box to compensate.
#Post#: 83603--------------------------------------------------
Re: Gearing
DIR By: markgriff
Date: January 8, 2014, 5:14 pm
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thanks for your replies.
I guess overdrive was always going to be the answer. I just
struggle with spending possibly £500 for what may turn out to be
a pile of shit, or £1200
for a new one. for the time being I will just put up with the
noise, and I am not in a hurry anyway.
#Post#: 83625--------------------------------------------------
Re: Gearing
DIR By: NoelC
Date: January 9, 2014, 6:53 am
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^^^ I'm there with you on that front. I purchased one of the
first batch of Rocky Mountain Roverdrives to come to the UK back
in 2002 and whilst on the whole it works OK I wouldn't be
rushing to buy another now the price is where it is (double what
it was when I bought one).
The upside with eBay is if you do buy a Fairey ask the question
- does the unit whine? If the seller says it doesn't you'll have
protection, Paypal always invariably finds in favour of the
buyer so you'd be able to return it for a refund.
There are other more involved options and it really does depend
how many miles you're going to do and how much you want to
spend. Ashcroft market a conversion kit to mount a later 5 speed
main box to series transfer, arguably the best combination being
a short bellhousing R380 with series transfer. You need to move
the engine 4 inches further forward so it's not a five minute
fit but is probably the simplest way to get 5 gears. In the
techie archive there is some great info about fitting an LT77
but personally I'd only do that if you have a lot of time and
not so much money. I've had enough Discgays with an LT77 to
realise it wasn't exactly Land Rover's finest hour.
#Post#: 83633--------------------------------------------------
Re: Gearing
DIR By: Dave
Date: January 9, 2014, 9:30 am
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Gearing? He was a Nazi. In charge of the Luftwaffe, wasn't he?
Coat on, taxi ordered... ;D
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