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Registered:
October 2005
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 60 Series Landcruiser Diff Ratio's?
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Fri, 07 October 2005 05:02
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I've recently completed a conversion on my 60 series landcruiser... now running a HSV 185i 5L from a VS.... my question to all out there with any tech knowledge is: Do you know what diff ratio would be best for this conversion? The motor revs to approx 6thou and travelling at 100ks it's at about 3 to 3 1/2 thous in 5th gear. It's a 83 FJ60, I think the current diff is 4.11.
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Location:
melb
Registered:
June 2003
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Re: 60 Series Landcruiser Diff Ratio's?
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Fri, 07 October 2005 14:25
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the tacho u r using is out by a 1000 rpm , a 4.1 dif criuser with 31-10.5 tyres does between 2300 rpm and 2500 rpm tops at 100 klm
check your speedo as well
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Location:
geelong
Registered:
August 2005
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Re: 60 Series Landcruiser Diff Ratio's?
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Sat, 08 October 2005 10:59
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i agree, i would get your tacho and speedo looked at. my dads 60 series sits on 2500rpm. if it turns out that the speedo and tacho are fine then the easyest thing that you could do would be to put bigger tyres on it. the other things that you could do would be to put diesel diff centres in it because thay are a higher gearing i think.
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Location:
Binningup WA
Registered:
April 2004
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Re: 60 Series Landcruiser Diff Ratio's?
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Sat, 08 October 2005 18:45
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I'd say your problem would be associated with the fact that you have put an 8 cylinder engine into a vehicle that has a tacho setup for 6 cylinder engine. This is assuming you use the normal Cruiser tacho. Doing the maths your 3500rpm at 100kms would equate to an actual value of 2625rpm at 100kms which is what my HJ75 Utes sits on(same standard 4.11 diffs). I'm assuming this has a 5 speed which came out sometime in 83 in the wagons.
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Location:
geelong
Registered:
August 2005
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Re: 60 Series Landcruiser Diff Ratio's?
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Sat, 08 October 2005 22:35
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yeah that would do it 
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 60 Series Landcruiser Diff Ratio's?
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Sun, 09 October 2005 03:08
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I'm presuming you're using the original gearbox etc. still, so your gearing hasn't changed. Both the old Toyota engine and the Holden engine have a relatively small useful rev range, and should work alright with similiar gearing (maybe a bit taller for the V8). Fix up your tacho, but then you should be able to tell by feel how hard the engine is turning...
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