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Old 08-23-2012, 11:34 AM   #4 (permalink)
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Sorry, I was wrong! I just looked it up. The differential swap is possible. It is not cut into the shaft (5th gear is however making that a custom job).

Good write up on a Toyota trans rebuild:
C52 transmission rebuild

Sadly, I don't think you'll gain a ton of ground there. The lowest final drive I know of is a 3.722 for a C series transmission which I am assuming you have (not totally sure). That will only drop your rpms by about 160 @ 100 kph. The only thing lower is what they've been putting in the diesel transmissions. I don't know what is available for you in Australia, but if you could find a C series trans out of diesel you'd be much better off just swapping that whole thing onto your bellhousing.
Current project: A better alternator delete
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