Should I regear to 4.10 - Ford Powerstroke Diesel Forum

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post #1 of 3 Old 08-05-2012, 08:05 PM Thread Starter
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Should I regear to 4.10

Ok so here is the spill; I have a zone offroad 4" lift coming on Monday and I want to put 33's on my 4x4 6.0 excursion. There is a lot of talk about rehearing if you go to bigger tires.
I did the math to reconfigure appropriate gear ratio ( bigger size tire divided by old size tire multiplied by current gear ratio= desired gear ratio).
Stock tires are 31.5 inches , the tires I want to put on are 33's and my current gear ratio is stOck 3.73 which gives me a new ratio of 3.9
Here is my question(s)

1. Since 3.9 ratio is smack dab in the middle of 3.73 and 4.10 do I need to regear to 4.10 to keep the same power and fuel economy I have now or does it make a difference.

2. Will the bigger tire cause my transmission to prematurely wear?

3. Does anyone have pictures of their excursion with a lift and 33" tires so I can get an estimate on what mine might look like after said lift?
I will submit before and after pics of mine when it is done this weekend!

Thanks In Advance
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post #2 of 3 Old 08-06-2012, 03:16 AM
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33's are stock tire size on a lot of trucks and the trucks that come with 20" rims have 34's as stock. You don't need to worry about re-gearing. Most would tell you it isn't worth it to change by a single step anyway, so until you get something big enough for 4.30's don't worry about it.

No worries about your transmission with those 33's.

33's are actually kind of small with a 4" lift. Most run 35's.
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post #3 of 3 Old 08-06-2012, 03:23 AM
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Quote:
Originally Posted by PGreenSVT View Post
33's are stock tire size on a lot of trucks and the trucks that come with 20" rims have 34's as stock. You don't need to worry about re-gearing. Most would tell you it isn't worth it to change by a single step anyway, so until you get something big enough for 4.30's don't worry about it.

No worries about your transmission with those 33's.

33's are actually kind of small with a 4" lift. Most run 35's.
Agree with all of this.
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