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a12datto120y
what rpm for 3 speed auto?
#1
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hi i was wandering with my 3 speed auto with an a12 at 80km/h it sits at 3000rpm and at 100km/h its around 3200rpm im guesing this is normal as the transmission reaches 3rd gear. But it seems a bit high to me?

Thanks!

Posted on: 2011/11/21 13:00
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bige
Re: what rpm for 3 speed auto?
#2
No life (a.k.a. DattoMaster)
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you may have the wrong diff ratio. how does it take off in 1st.

Posted on: 2011/11/21 17:54
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a12datto120y
Re: what rpm for 3 speed auto?
#3
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hi well in first gear it takes of preety normal. Any ideas what rpm should it be roughly around?

Posted on: 2011/11/21 23:23
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D
Re: what rpm for 3 speed auto?
#4
No life (a.k.a. DattoMaster)
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sounds good to me from a 120y with the heaver body
otherwise the economy wont be flash.

Posted on: 2011/11/22 0:06
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a12datto120y
Re: what rpm for 3 speed auto?
#5
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thanks for the clarification.

Posted on: 2011/11/22 0:09
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D
Re: what rpm for 3 speed auto?
#6
No life (a.k.a. DattoMaster)
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My old datsun 1000 vb10 sat at 3200 on 100kph
and had good economy same as the kb10 coupe
I had so if you think its too noisy then you
could go for a 3.7 or 3.9 if it has the 4.11
at the moment but if it has the original diff
ratio in her you could try slightly larger
diameter tyres or wheel combo.

Posted on: 2011/11/22 1:41
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ddgonzal
Re: what rpm for 3 speed auto?
#7
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The A12 can cruise at 4000 RPM all day, so it is good to go at only 3200 RPM.

Posted on: 2011/11/22 4:11
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