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Guest Message by DevFuse
 

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EA83 gearbox

3.7 OR 3.9

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2 replies to this topic

#1 ARJ

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Posted 19 July 2014 - 07:11 AM

How can you tell if the 5 speed dual gearbox has a final drive ratio of 3.7 or 3.9.?? it is out of a RX 



#2 bratsrus1

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Posted 19 July 2014 - 07:31 AM

Hi This is Jerry, count the splines on the axle shalf if it's 23 it's got 3.90 gears if it has 25 it's 3.70 gears also you said it's out of a rx that has 25 splines 3.70 gears. Thanks Jerry

#3 Gloyale

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Posted 19 July 2014 - 09:26 AM

Hi This is Jerry, count the splines on the axle shalf if it's 23 it's got 3.90 gears if it has 25 it's 3.70 gears also you said it's out of a rx that has 25 splines 3.70 gears. Thanks Jerry

 

There are also S/R 5spds from Non-turbo XTs that have 23 spline, but 3.7 ratio.  So the stubs don't concretely tell.....but in most cases yes.

 

This trans from an RX should be 25 spline and 3.7






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