3.31 rear in a platinum
03-11-2012, 01:53 PM
#1
Member
Thread Starter
3.31 rear in a platinum
hey all,i've been lurking hear for awhile,thanks for all the great info
!i'm getting ready to trade in my 08 f-250 on a new 150 the dealer near me has a couple platinum demos which they are discounting a fair bit the only issue is they both have the 3.31 rear ends.
anybody out there have this in their truck what would the pros and cons be?i'm thinking it would be good for mileage but could i tow anything substantial or even run bigger tires/wheels without an issue?
thanks!
!i'm getting ready to trade in my 08 f-250 on a new 150 the dealer near me has a couple platinum demos which they are discounting a fair bit the only issue is they both have the 3.31 rear ends.anybody out there have this in their truck what would the pros and cons be?i'm thinking it would be good for mileage but could i tow anything substantial or even run bigger tires/wheels without an issue?
thanks!
03-11-2012, 02:38 PM
#2
Five-0 Ret.
mastiff, welcome to the forum. Can't help much on the gears, but you can check out all the towing info that will help at www.ford.com.
03-11-2012, 03:32 PM
#3
Grumpy Old Man
Assuming EcoBoost engine and 3.31 axle, your tow rating is about 8,000 pounds. The tow rating is optimistic, so call it 7,000 pounds. That means you can tow a trailer that grosses up to 7,000 pounds up a mountain pass in the summertime at a reasonable speed without overheating and melting something in the drivetrain. Depending on your definition of "substantial", you'll probably be satisfied with the power and torque of that pickup.
Replacing your 20" tires with taller tires will drastically reduce your tow rating unless you also replace the axle ratio with proportionally shorter legs.
Last edited by smokeywren; 03-11-2012 at 04:35 PM. Reason: brain fade
03-11-2012, 03:51 PM
#4
Ford Freak
Originally Posted by smokeywren
Assuming EcoBoost engine, SuperCrew, 6.5' bed:
2012 Platinum comes with only one tire/wheel/axle pkg. 20" tires and wheels and 4.10 ratio e-locker axle.
GCWR = 17,100 with a tow rating of over 11,000 pounds.
The GCWR is actual, but the tow ratings are a myth assuming your wet and loaded pickup weighs only 6,000 pounds before you tie onto the trailer. Subtract about 1,000 pounds from the tow ratings to come up with a realistic max trailer weight you can tow without exceeding the GCWR of the truck.
So your truck is designed to be able to gross 17,000 pounds when climbing a mountain pass in the summertime without overheating anything, and without being the slowpoke in the right lane holding up traffic.
So you'll have more than enough power and torque to tow a reasonable size trailer less than about 10,000 pounds. And you'll love the power and torque of the unloaded pickup.
Going to bigger tires is the same as any other vehicle. If you want to maintain the same feel of power and torque, then you must change the axle ratio to compensate for the taller tires. But since the Platinum is overpowered to begin with, you will probably be happy with any reasonable increase in tire diameter up to about 35" with the 4.10 axle ratio. (More than 35" is for kooks anyway.)
03-11-2012, 04:38 PM
#6
Grumpy Old Man
03-11-2012, 05:23 PM
#7
Senior Member
4x2 3.31 axle 8K towing......I'd pass. 44K for a limp noodle 
BTW a the same truck Eboost 4x4 with a 3.55 tows 9600 and costs 49k with a 3.73 it towws 11200 but its 50k.
There is no way around it the Platinum is a ripoff.
BTW a the same truck Eboost 4x4 with a 3.55 tows 9600 and costs 49k with a 3.73 it towws 11200 but its 50k.
There is no way around it the Platinum is a ripoff.
Last edited by Hondafan; 03-11-2012 at 05:28 PM.
Trending Topics
03-11-2012, 05:58 PM
#8
Member
Thread Starter
03-11-2012, 06:20 PM
#9
Senior Member
Originally Posted by mastiff23
hey all,i've been lurking hear for awhile,thanks for all the great info!i'm getting ready to trade in my 08 f-250 on a new 150 the dealer near me has a couple platinum demos which they are discounting a fair bit the only issue is they both have the 3.31 rear ends.
anybody out there have this in their truck what would the pros and cons be?i'm thinking it would be good for mileage but could i tow anything substantial or even run bigger tires/wheels without an issue?
thanks!
!i'm getting ready to trade in my 08 f-250 on a new 150 the dealer near me has a couple platinum demos which they are discounting a fair bit the only issue is they both have the 3.31 rear ends.anybody out there have this in their truck what would the pros and cons be?i'm thinking it would be good for mileage but could i tow anything substantial or even run bigger tires/wheels without an issue?
thanks!
3.31
3.55
3.73 which this is what I have on my off road 4x4 package 2011 supercrew lariat 5.0 20" inch wheels
Which one is the better ratio
03-11-2012, 07:10 PM
#10
Meaner than ymeski56
The shorter gears, larger numbers, are for better performance and are better for towing whereas the taller gears, smaller numbers, are for better fuel economy. Most pickups run those three ratios but some have 3.15s or 4.10s. Hope this helps.