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I just looked in a new ford factory manual set on the 4000 series and don't see any difference in any of the models for the rear end ratio. They do show that there are some differences in the LCG rear end model but it appears it is in the construction of the differential assembly and not in the ratio. They show the ratio for the 4000 with 4, 6, 8, and 7 speed transmissions as 14.75
The 10 speed transmission has a rear end ratio of 30.00 STANDARD LCG For production code "C" they show the LCG as standard rear wheels as: W7x24 tire 8.3x24 4ply.
Front wheel Standard for LCG: 4.50x13 tire 6.50x13 4ply They say to only use these rear wheels with the 13 in front wheels.
OPTIONAL LCG
Rear wheel optional on LCG: W16-16 16 rim tire 18.4x16 6ply
Front wheel LCG 4.0x16 tire 6.0x16 4ply They say to only use these rear wheels with the 16 in front wheels.
STANDARD ALL PURPOSE
Rear wheels: W11x36 tire 12.4x36 4ply
Front wheels: 4.0x16 tire 6.0x16 4ply OPTIONAL ALL PURPOSE Several optional rear wheels from 36, 38, 30, 26 I could not find any reference to different length front spindles but there must be different ones. The parts manual would probably tell that. The parts manual would tell if there is any different gear ratios as well. Regards
Gary
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