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4 speed auto and diff ratio swaps 

 

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 Post subject: 4 speed auto and diff ratio swaps
Posted: Wed Jan 16, 2013 5:12 pm 
Parts Gopher
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Joined: 1st Oct 2011

Location: sydney
NSW, Australia

hi everyone,

so ive been doing a bit of research on here and changing diff ratios to compensate for the horrible 1st gear ratio in the btr autos and my question is say if you got an el auto and you want a 3.9:1 or 4.11:1 diff ratio ive seen people say to get a jaycar speedo corrector kit to get the speedo reading true but after the ratio change then the shift patterns are out (as in it kicks down early or to late)

is there anything that can be done to correct this or will it require a j3 chip and tune

ive also read that the vehicle may reach the speed limiter quicker, perhaps even before a 1\4 mile run is finished, i know you can get limiter removers from shiftkits.com but is there a diy fix for this that doesnt cost $145

thanks everyone.
muchly appreciated.

 

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 Post subject: Re: 4 speed auto and diff ratio swaps
Posted: Fri Jan 18, 2013 5:58 am 
Parts Gopher
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Joined: 1st Oct 2011

Location: sydney
NSW, Australia

can anoyone help

just wondering if there are any other options than j3 chip

 

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 Post subject: Re: 4 speed auto and diff ratio swaps
Posted: Fri Jan 18, 2013 9:30 am 
Getting Side Ways
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ive posted a diagram here how to wire up the speedo corrector so shift points are the same
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