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vitara rear diff question

Posted: Mon Aug 18, 2008 6:55 pm
by atari4x4
Can I bolt a complete 5.12 rear out of a 1.6 carby vitara into the rear of my j20a 2.0 vitara or will I need to change r&p over?

I already have a complete 5.12 front to go in & I'm wanting to correct the gearing due to larger tyres.

Posted: Mon Aug 18, 2008 8:19 pm
by joeblow
you'll have to hot-rod the front axles a little for the front to fit.

Re: vitara rear diff question

Posted: Mon Aug 18, 2008 10:07 pm
by nicbeer
atari4x4 wrote:Can I bolt a complete 5.12 rear out of a 1.6 carby vitara into the rear of my j20a 2.0 vitara or will I need to change r&p over?

I already have a complete 5.12 front to go in & I'm wanting to correct the gearing due to larger tyres.
what ratio have u got now?

Posted: Mon Aug 18, 2008 10:13 pm
by joeblow
j 20's have 4.8's.

Posted: Mon Aug 18, 2008 11:14 pm
by cj
The only issue is making sure that the front has 26 spline sidegears fitted. The manuals have 4.625's like the H20A I thought, the 4.875's were in the auto 2.0's.

Posted: Mon Aug 18, 2008 11:21 pm
by joeblow
and manuals...got a couple here....

Re: vitara rear diff question

Posted: Tue Aug 19, 2008 10:35 am
by atari4x4
nicbeer wrote:
atari4x4 wrote:Can I bolt a complete 5.12 rear out of a 1.6 carby vitara into the rear of my j20a 2.0 vitara or will I need to change r&p over?

I already have a complete 5.12 front to go in & I'm wanting to correct the gearing due to larger tyres.
what ratio have u got now?
I've got 4.6's in the vitara now. I've still got the 26 spline 5.12 front I got from you, that should bolt straight in & I've come across a 5.12 rear from a carby vitara so I should be back to almost stock gearing.

Posted: Tue Aug 19, 2008 11:00 am
by joeblow
yours a shorty?

Posted: Tue Aug 19, 2008 11:15 am
by atari4x4
joeblow wrote:yours a shorty?
yeah, it's a 97 j20a SWB.

Posted: Tue Aug 19, 2008 12:51 pm
by joeblow
that would explain it then, the j20 lwb's are a 4.8.

Posted: Wed Aug 20, 2008 9:28 am
by atari4x4
Thanks all, it looks like I'm changing diff ratios!!! :armsup:

Posted: Wed Aug 20, 2008 9:34 am
by joeblow
when u do take note of your fuel economy and let us all know.

Posted: Wed Aug 20, 2008 9:50 am
by atari4x4
I'll try my best, but I'm a bit of a throttle jockey + I'm thinking of stepping up from 30x9.5 MT/R to 31x10.5 MT/R's around the same time....