davo Posted July 3, 2015 Share Posted July 3, 2015 Which diff gives the best ratio when using a redtop driving through an 1800 gearbox, for road use ? So which is best 1800 manual,2.0 gte manual or 2.0 gte auto ? Quote Link to comment Share on other sites More sharing options...
mantaray Posted July 3, 2015 Share Posted July 3, 2015 Depends on how you are going to use the car for. Manual 2.0 gte (3.44:1) will give a good cruising speed and fare acceleration Manual 1800 ( 3.67:1) good acceleration but a bit high revving when cruising 1 Quote Link to comment Share on other sites More sharing options...
rutts Posted July 3, 2015 Share Posted July 3, 2015 I had a 1.8 axle with a zf lsd fitted. Think for myself a 2.0 axle could be better if used everyday . Quote Link to comment Share on other sites More sharing options...
lamchop77 Posted July 3, 2015 Share Posted July 3, 2015 Also depends on the size of the wheels and tyres. Std gte wheels and tyres are 195/60 r14. If you switch to 195/50 r15 you actually reduce the gearing slightly.....well according to my gear calculator you do!!! Quote Link to comment Share on other sites More sharing options...
mantasrme Posted July 3, 2015 Share Posted July 3, 2015 For road use i'd go for the GT/e 3.44-1 Quote Link to comment Share on other sites More sharing options...
Snowy Posted July 4, 2015 Share Posted July 4, 2015 To be honest the axle choice depends more on your driving style and intended use. If you're going to sit on the motorway all the time go for the GTE axle but if you want a B road blaster then go for the 1.8 axle. If you are used to an 1800 the revs at motor way speed wont bother you anyway. Quote Link to comment Share on other sites More sharing options...
dynamytedan Posted July 4, 2015 Share Posted July 4, 2015 Also depends on the size of the wheels and tyres. Std gte wheels and tyres are 195/60 r14. If you switch to 195/50 r15 you actually reduce the gearing slightly.....well according to my gear calculator you do!!! im just going to put tyres on my drums would the calculator show you what size wheels tyres would bring a gte 3.44 axle to the same as a 3.67 (1.8) ? if you know what i mean .... Quote Link to comment Share on other sites More sharing options...
lamchop77 Posted July 7, 2015 Share Posted July 7, 2015 Should be able to figure it out!! What size tyres were on a std 1.8 manta? Quote Link to comment Share on other sites More sharing options...
lamchop77 Posted July 7, 2015 Share Posted July 7, 2015 Right, used std tyre size of 185/70 13 which is almost the same rolling radius as the 195/60 14. To get a 3.67 up to the same mph (well close as i can, its within 0.3 mph for 1st gear) the best tyre size thats available is 205/55 16. HTH Chris Quote Link to comment Share on other sites More sharing options...
lamchop77 Posted July 10, 2015 Share Posted July 10, 2015 Ooops read that wrong and got it the wrong way round!!! Sorry. Tyres you need are 185/60 13, gives you exactly the same speeds on a 3.44 as a 3.67 with 185/70's on. HTH Chris Quote Link to comment Share on other sites More sharing options...
dynamytedan Posted July 10, 2015 Share Posted July 10, 2015 i knew you could do it , thanks Quote Link to comment Share on other sites More sharing options...
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