98 f150 xly 4x4 tire size?
04-11-2012, 08:39 AM
#11
Originally Posted by Warspite
My Lariat came stock with 255/70/16. I think you could go to 285 without a lift kit, which would be expensive for these 2WD trucks.
04-11-2012, 01:18 PM
#12
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my trucks 4 wheel drive, but money for a lift isnt in my budget right now, and i need new tires right now so just gona get some decent tires then in a few months lift it a bit.
10-20-2016, 12:41 AM
#13
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10-23-2016, 01:50 AM
#14
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I have 285/75/R16 Coopers Discoverers AT3 on my truck. Like rcruz said, they only time when they rub a little is at full turn and only when I'm backing up.
I've cranked up the T Bars a bit, but nothing drastic.
No real power loss in town, but you can feel the slight drag on the highway, but nothing I can't deal with. I have my Mustang for speed fun.
I've cranked up the T Bars a bit, but nothing drastic.
No real power loss in town, but you can feel the slight drag on the highway, but nothing I can't deal with. I have my Mustang for speed fun.
10-24-2016, 08:35 AM
#15
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I have 285/75/R16 Coopers Discoverers AT3 on my truck. Like rcruz said, they only time when they rub a little is at full turn and only when I'm backing up.
I've cranked up the T Bars a bit, but nothing drastic.
No real power loss in town, but you can feel the slight drag on the highway, but nothing I can't deal with. I have my Mustang for speed fun.
I've cranked up the T Bars a bit, but nothing drastic.
No real power loss in town, but you can feel the slight drag on the highway, but nothing I can't deal with. I have my Mustang for speed fun.
10-24-2016, 11:29 AM
#16
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If you have 3.55 gears then you will definitely notice it and you will want gears sooner than later. If you have 3.73's then you might be ok if you dont tow very often.
10-24-2016, 02:46 PM
#17
Senior Member
Instead of upgrading the gear ratio just use the same viscosity of gear oil used by the factory which is 75w90. 75w140 gear oil is too thick causing too much drag. Make sure to use gl-5 gear oil not gl-4.
Last edited by w0lvez; 10-24-2016 at 02:50 PM.
10-24-2016, 02:54 PM
#18
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That's perfect because I serviced my diff and put 75w90 already! Thanks for the info, I'm going to go with 4.88 on both axles in the near future
10-24-2016, 03:24 PM
#19
Senior Member
Using smaller rim has better result than upgrading gear ratio. Best example is E150 4r70w 4.6 V8 Stock rim is 15" 3.55 gear ratio. It's heavier than 4x4 f150 4r70w 4.6 3.55 but it has higher towing capacity if f150 is using 17" rims
E150 is more fuel efficient than F150. It also move more quickly because the rom are smaller and lighter.
Last edited by w0lvez; 10-24-2016 at 03:31 PM.
10-24-2016, 03:46 PM
#20
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I already tried upgrading the gear ratio to 4.56. The problem is the driveshaft. 5.4 driveshaft can only handle 4.10 gear ratio. 3.55 is the max for 4.6 and 4.2. The stock driveshaftis only made of aluminum alloy. You can feel ithe driveshaft flexing at high speed causing vibration.
Using smaller rim has better result than upgrading gear ratio. Best example is E150 4r70w 4.6 V8 Stock rim is 15" 3.55 gear ratio. It's heavier than 4x4 f150 4r70w 4.6 3.55 but it has higher towing capacity if f150 is using 17" rims
E150 is more fuel efficient than F150. It also move more quickly because the rom are smaller and lighter.
So much of what you say I let fly but... just wow.
Also the 2003 E150 towing capacity was rated from 4700 to 6500 lbs and the 2003 F150 was rated from 5000 to 8800 lbs depending on how each vehicle was equipped.
If they both are equipped with the 5.4 and 3.55 gears the E is rated at 6500 and the F is rated at 8500.
Those numbers came from the fleet ford towing guide.
Last edited by jprevat; 10-24-2016 at 03:54 PM.