Gears
Thread Starter
07f150
Joined: Nov 2007
Posts: 14
Likes: 0
From: San Antonio
Gears
Hey guys i have a 2007 f150 reg cab 2wd with a 4.2L v6. I was wondering can i change my gears ? and if i do what will it do. Iam basically looking for performance, so i need to know what gears to get . please help. Thank you 
Senior Member
Joined: Nov 2007
Posts: 294
Likes: 4
The good part is you are 2wd so there is only one set of gears to replace.
Bad part, unless you have damn good tools, including dial indicators to set the gear engagement farm it out to a good shop.
What gears are in there now? Limited slip or open diff?
you might be able to get the center section out of a wrecked truck that has good gears and a posi/ limited slip diff.
Personally I think 3.55's are a good mid ratio gearset... you can still drive it on the highway, and still get some ooomph off the line.
I have 4.10's in my 06 4wd... I would have killed to get the 3.55 gears but the plow package is 4.10's or nothing. With the price of gas the closer you get to 2.73 the happier you are going to be.
Bad part, unless you have damn good tools, including dial indicators to set the gear engagement farm it out to a good shop.
What gears are in there now? Limited slip or open diff?
you might be able to get the center section out of a wrecked truck that has good gears and a posi/ limited slip diff.
Personally I think 3.55's are a good mid ratio gearset... you can still drive it on the highway, and still get some ooomph off the line.
I have 4.10's in my 06 4wd... I would have killed to get the 3.55 gears but the plow package is 4.10's or nothing. With the price of gas the closer you get to 2.73 the happier you are going to be.
Thread Starter
07f150
Joined: Nov 2007
Posts: 14
Likes: 0
From: San Antonio
hey thank you for the information! I really dont know anything about gears and which ones i have in now. i have messed with trucks before but never touched the gear part. So iam basically looking for any help i can get. I just need something that i can get hp out if them and not get killed by the gas.
Paint it black
Joined: Oct 2007
Posts: 2,667
Likes: 20
From: washington dc
The good part is you are 2wd so there is only one set of gears to replace.
Bad part, unless you have damn good tools, including dial indicators to set the gear engagement farm it out to a good shop.
What gears are in there now? Limited slip or open diff?
you might be able to get the center section out of a wrecked truck that has good gears and a posi/ limited slip diff.
Personally I think 3.55's are a good mid ratio gearset... you can still drive it on the highway, and still get some ooomph off the line.
I have 4.10's in my 06 4wd... I would have killed to get the 3.55 gears but the plow package is 4.10's or nothing. With the price of gas the closer you get to 2.73 the happier you are going to be.
Bad part, unless you have damn good tools, including dial indicators to set the gear engagement farm it out to a good shop.
What gears are in there now? Limited slip or open diff?
you might be able to get the center section out of a wrecked truck that has good gears and a posi/ limited slip diff.
Personally I think 3.55's are a good mid ratio gearset... you can still drive it on the highway, and still get some ooomph off the line.
I have 4.10's in my 06 4wd... I would have killed to get the 3.55 gears but the plow package is 4.10's or nothing. With the price of gas the closer you get to 2.73 the happier you are going to be.
id trade you my 3.55 for your 4.10s
Inaugural TOTM
Joined: Jan 2007
Posts: 3,441
Likes: 18
From: New Braunfels, TX
I agree with Tide, get yourself a good CAI and tuner if you want increased performance. The 3.55's are a good set if you're running stock. Now if you lift it and throw some bigger tires then you could move up to some 4.10's or 4.56's. I recently threw a set of Yukon 4.56's in mine and it brought my lost power back.
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Senior Member
Joined: Oct 2007
Posts: 215
Likes: 0
From: Springville, Iowa
I have an 07 f150 book right here. If its an automatic, it will be a 3.55 or 3.73. If you have a munual trans, it could even be a 3.31. If its an STX model, It is most likely going to be a 3.55 non limited slip because that is what came standard. The 3.73s are more common for the xl-xlt. The book doesn't even make the 4.10s an option for the 4.2L. There is an axel code inside the door and I saw somebody post all the codes in a forum on here, I will try to find it.
