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rear diff's 720 -620

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will a 3rd member from a 2wd 620 fit in a 2wd 720 ? would like to run the 4.62 gear!


yes I have a hardbody 3:90 in my girlfriends 521 works great, I would verify the gear ratio I thought they came with 4:38s...



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thanks great news!!! the automatic's (620) came with the 4.62. my crew members are running trucks in the none points races and that gear will stomp the fords and yota's I'am sure it will be a lot of fun to pit for them!!

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Be sure to check that the drive shaft bolt pattern works. Some 720s used a larger pattern, maybe just the 4X4s, not sure, but check.


Yes, but only the Z24i motor Hardbody had the H-190 rear end.

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