Rear end gears!
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New User
Joined: Oct 2001
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Rear end gears!
I hope I don't get into trouble for posting this here but my brother and I just bought new trucks. Mine a f350 CC LB DRW and his a F250 CC SB SRW Both V10's any way at 80 mph his tach reads 2300 mine at 80 reads close to 2900 I have the 4:30 limited slip he has the 3:73's anyway my truck is new and if anyone wants to trade their 3:73's that are new for my 4:30's let me know my ad is posted in the classifieds Thanks
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Joined: Sep 2001
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Rear end gears!
Keep the 4:30's and get a bigger tire like maybe 305's, this tire size increase will move you closer to the 3:83's. A lot of people have done this already and that is what I intend to do when my new truck arrives any day now. Good luck.
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Joined: Sep 2001
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Rear end gears!
oops, I assumed you had 4 wheel drive like what mine will be, If it's 2 wheel drive i'm not sure what tire size will fit that.
Another weird observation is the fact that I replied to my own post.....weirdness.
Another weird observation is the fact that I replied to my own post.....weirdness.
Logistics Pro
Joined: Feb 2000
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From: Mesa
Rear end gears!
Also keep in mind that your brother has 265 tires and your dually prolly has 215 or 225's which are smaller. You could go to a 235x75x85 which are about the same diameter as the 265's.
Logistics Pro
Joined: Feb 2000
Posts: 3,955
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From: Mesa
Rear end gears!
Yep, a taller tire will change the overall ratio. Have your dealer reprogram the speedo after the tire change. One drawback to taller tires it lowers the towing capacity of the truck.
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Rear end gears!
So It will be a noticeable difference with a taller tire like half way between the two more or less? thanks for the input I do appericate it.
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Rear end gears!
I think I remember seeing on Horsepower TV or a similar show that every 1" in tire size change, is about .1 in overall gear ratio change.
Ex: If you went from a 33" tire to a 35" tire with 4.30 gears...it would lower your overall ratio to 4.10....or something like that?????????????????
Ex: If you went from a 33" tire to a 35" tire with 4.30 gears...it would lower your overall ratio to 4.10....or something like that?????????????????
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