Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2004 - 2008 F150
Sign in using an external account
Register Forgot Password?


2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
SPONSORED BY:
Click HereAdvertisement

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 08-12-2004, 10:22 PM
aromandoj aromandoj is offline
New User
 
Join Date: Aug 2004
Posts: 1
aromandoj is starting off with a positive reputation.
355 vs 373 Ltd. Slip Differential

Hello out there: A dealer recently encouraged me to go ahead and purchace a F150 w/ 373 Ltd. Slip differential (which he had on his lot) which met most of my criteria besides the 355 Ltd. Slip. He said that most customers perfer the 373 because of the performance it provides and also added that most claim it gets better gas milage. Now I never haul or tow heavy and saw no need for the bigger rear end and counted on the fact that a 355 would be more efficient when the truck is light. 90% of the time... How about some opinions, expertise, and experience...

NEW F150 Buyer

Last edited by aromandoj; 08-12-2004 at 10:24 PM. Reason: grammer error
Reply With Quote
  #2 (permalink)  
Old 08-12-2004, 10:51 PM
wamsleyb wamsleyb is offline
Freshman User
 
Join Date: Jun 2004
Posts: 35
wamsleyb is starting off with a positive reputation.
Honestly, you will probably never see the gas difference unless you do a lot of high speed driving. I have the 3:73's and am getting 16 mpg's in rush hour LA traffic with AC. I pull at least 18.5 on the open road at 75-80 pending on traffic speed. Where it helps though is when you encounter hills while driving or when you tow, at those moments you will be glad for the those gears. Besides these trucks are heavier and the little extra gear makes it accelerate like a heritage with 3:55's.
Good Luck with your truck,
Brian
Reply With Quote
  #3 (permalink)  
Old 08-13-2004, 02:27 AM
timhood timhood is offline
Senior User
 
Join Date: Aug 2004
Location: Salt Lake City, Utah
Posts: 170
timhood is starting off with a positive reputation.
Not always available

Quote:
Originally Posted by aromandoj
Hello out there: A dealer recently encouraged me to go ahead and purchace a F150 w/ 373 Ltd. Slip differential (which he had on his lot) which met most of my criteria besides the 355 Ltd. Slip. He said that most customers perfer the 373 because of the performance it provides and also added that most claim it gets better gas milage. Now I never haul or tow heavy and saw no need for the bigger rear end and counted on the fact that a 355 would be more efficient when the truck is light. 90% of the time... How about some opinions, expertise, and experience...

NEW F150 Buyer
I have the 3.73 in my truck. I wanted the 3.55 because I thought it would give better fuel economy, but the 3.55 isn't even available on some models. I have the FX4 SuperCrew. I think you can't get the 3.55 on any SuperCrew 4x4 trucks. Some others maybe as well.
Reply With Quote
  #4 (permalink)  
Old 08-13-2004, 02:57 AM
bigwtx's Avatar
bigwtx bigwtx is offline
Senior User
 
Join Date: Oct 2003
Location: Austin, TX
Posts: 204
bigwtx is starting off with a positive reputation.
I have 3.55 gears on my STX and on hills my truck must downshift (sometimes twice) in order to keep up with traffic. It seems like if I had bigger gears I would actually see better mileage b/c the truck wouldn't have to downshift...
__________________
Brandon Wright
2010 Ford F-250 Regular Cab XL 5.4L, 4x2, ZF6, 4.30LS, 34" Tires
Reply With Quote
  #5 (permalink)  
Old 08-13-2004, 06:14 AM
Dunk's Avatar
Dunk Dunk is offline
Elder User
 
Join Date: Jul 2004
Location: South Jersey
Posts: 511
Dunk is starting off with a positive reputation.
I've got 3.73LS in my Lariat. I'd gone for 4.10's if they offered it.. With 32" stock tires and .70 gear in overdrive the engine is running less than 2000rpms at 65-70mph.. I'm getting 15.5-16mpg around town and I've seen as high as 19.6 on the highway, but the truck only had 125 miles on when it did that. Just 700 miles now, but I've got a couple trips this week and I'm going to check it again.
__________________
Marine Surveyor
Reply With Quote
  #6 (permalink)  
Old 08-13-2004, 07:42 AM
fatman66's Avatar
fatman66 fatman66 is offline
Senior User
 
Join Date: Mar 2004
Location: Rochester NY
Posts: 468
fatman66 is starting off with a positive reputation.
I'm not an expert by any means but from what I gather the difference between 3.55 and 3.73 is small, its not like we are comapring 3.55 to 4.10 here. If you never tow you'll probably never notice which one you have and honestly I havn't been able to see any difference in gas mileage between the 3.55 and he 3.73 based on what people have posted but then again all the other factors make that a hard comparison. If the dealer wants to sell you that one but you want the 3.55 tell him that you'll buy that one but you don't want to pay for the option that you don't want, see what they say. Either way you'll enjoy the truck. JMHO
__________________
Silver 2004 F-150 XLT Scab 133'' WB, 4x4, 5.4L
Reply With Quote
  #7 (permalink)  
Old 08-13-2004, 12:02 PM
timhood timhood is offline
Senior User
 
Join Date: Aug 2004
Location: Salt Lake City, Utah
Posts: 170
timhood is starting off with a positive reputation.
It sounds like it doesn't really matter I had to take the 3.73. That's ok, either way it wasn't going to be a deal-breaker. BTW, I thought the one dealer was blowing smoke, but it was confirmed by another dealer. And it was a chargeable add-on. Whether I paid for it is a matter of perspective, I guess. We negotiated a price based on all the stuff put on the truck, so I could say I didn't pay for it, but then I paid a little more for something else... :-)
Reply With Quote
Old 08-13-2004, 12:02 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2004 - 2008 F150

Tags
355, 373, compare, differential, end, estimated, explorer, f150, f250, ford, fuel, gears, ltd, mileage, rear, slip, truck

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 06:16 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup