Pre 84 Trucks 1st gen pickups

dual ? and 4.7 ?

Old Jan 27, 2010 | 09:01 PM
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rottenagenda's Avatar
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dual ? and 4.7 ?

i was planing to put 4.7s in my case now the upgrade to duals later. i have notice everone sets up there cases 2.28 front , 4.7 rear. can you run it the other way around? and is 4.7 going to suck with 33s and 4.37s?
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Old Jan 27, 2010 | 09:56 PM
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Low range gears only affect just what they say...low range. So therefore, lower tcase gears could never "suck" on the road, since high gear on the tcase is 1:1 aka straight through. I run the lower gears in the rear case, and I like it better that way. Besides, if 1st gear is too low with the 4.7 gears in low range, just shift your trans to 2nd or 3rd gear.
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Old Jan 28, 2010 | 05:25 AM
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you can run the 4.7 in the front case but it would put a ton of torque on the out put shaft, hence why they recommend the 4.7 in the rear case.
one thing-if you get a donor case for a dual set up..try to make sure you get one from an 81+ I have found that the output shaft on 79-80's are slightly different and won't correctly engage other toy transmissions with out some work...
http://www.pirate4x4.com/forum/showt...ferrerid=89727
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