What is needed to go from 3.15 to 3.73? - Page 2 - Ford F150 Forum - Community of Ford Truck Fans



General F150 Discussion General Ford F150 truck discussions and questions
Sponsored by:
Sponsored by:

What is needed to go from 3.15 to 3.73?

Reply
 
 
 
Thread Tools Search this Thread
Old 03-20-2017, 11:55 AM   #11
Member
 
wildroamer's Avatar
 
Join Date: Feb 2017
Location: Vermont
Posts: 75
Thanked 7 Times in 7 Posts
Default

I just changed from 3.31 to 3.73 in my 13 4X4. Really couldn't be happier. I bought Ford OEM gears form Tasca for a great price, bit of course you can do better with an aftermarket brand like Yukon, etc.
You'll need to order a master install kit too. Mine was a Yukon.
wildroamer is offline   Reply With Quote
Old 03-20-2017, 08:34 PM   #12
Senior Member
 
marshallr's Avatar
 
Join Date: Apr 2016
Location: Georgia
Posts: 612
Thanks: 0
Thanked 112 Times in 95 Posts
Default

Quote:
Originally Posted by Andrew Christensen View Post
Thanks guys! By yellow sticker, are you referring to the "Tire and Loading Information" sticker?

It says at the top that the occupants and cargo should never weigh more than 1385lbs

Not clear what that means for all this.
It means your suspension can't handle more than 1385 lbs added weight to the truck. An 8000 lb trailer isn't going to be practical even with 4.11 gears. You'll have a tongue weight of over 1000 lbs leaving you only about 300-350 lbs for all passengers and gear inside the truck. Some trucks have a payload of 1800-2000 lbs.

If you pack light it is theoretically possible. You'd be slightly overloaded. But in reality you'd be better off with a lighter load or a heavier duty truck.
marshallr is offline   Reply With Quote
Old 03-20-2017, 11:49 PM   #13
Senior Member
 
Magnetic157's Avatar
 
Join Date: Aug 2016
Location: Central NJ
Posts: 667
Thanked 100 Times in 71 Posts
Default

I agree, with that small of a payload number towing 8,000 lbs isn't really the best idea. Even with an generally unrealistic ~10% hitch weight that would only leave you with around 500 lbs. If you have a more realistic tongue of 13% then you are down to 350 lbs - which is barely enough then for the driver and hitch. Once you minus out a 175lb driver, a 100lb hitch, any mods and some miscellaneous travel stuff you are maxed out - and that assumes no passengers.

If you are going to towing frequently enough to want new gears you should really be in the market for a lighter trailer or a truck better able to tow that kind of load.

If your payload sticker was above 16-1700 I'd say go for it - but 1,385 is a little low for that weight trailer IMO.

Last edited by Magnetic157; 03-21-2017 at 12:00 AM.
Magnetic157 is offline   Reply With Quote
Old 03-21-2017, 10:39 AM   #14
Senior Member
 
Join Date: Feb 2012
Posts: 4,140
Thanked 517 Times in 435 Posts
Default

Quote:
Originally Posted by Andrew Christensen View Post
Thanks guys! By yellow sticker, are you referring to the "Tire and Loading Information" sticker?

It says at the top that the occupants and cargo should never weigh more than 1385lbs

Not clear what that means for all this.

My 14 had a 1470# payload, and I figured 7600# was the limit. More like 6300# once I got it hooked and weighed with everything in it. By the time I was done, I had about 150# left after myself. This was with less than 11% TW too. My 16 has 1580# payload so without any changes to the trailer I should be OK in the weight department now. Would like at least 100# more Payload, and if I were to remove the power running boards, I may have just enough to take the whole family with instead of using a second car.
acdii is online now   Reply With Quote
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:05 PM.


Copyright 2006 - 2017 F150Forum.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: