Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

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  
Old 02-27-2002, 10:20 PM
my74f250 my74f250 is offline
New User
 
Join Date: Feb 2002
Posts: 2
my74f250 is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

How do I go about identifying what I have!! I would also like to know how to identify the trans and the transfer case! I think I have a pretty good Idea of what I have but would like to make sure!! Thanks
Reply With Quote
  #2  
Old 02-27-2002, 11:17 PM
bigbrownie bigbrownie is offline
Freshman User
 
Join Date: Feb 2002
Location: Sullivan
Posts: 25
bigbrownie is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!


The rear and front end are probably danas, and they sould have tags on the side of the pumpkin cover,it will say D4.11 or something like that. Thats your ratio and if Im not mistaken it also says D4.1160 which would be 4.11 ratio dana 60's. As far as transfer case and Transmission I dont know too much about. I know theres a different shape to the pan on the c-6. Maybe someone else can help you with that. Sorry I couldnt.
Reply With Quote
  #3  
Old 03-02-2002, 01:34 AM
jsworkman's Avatar
jsworkman jsworkman is offline
Senior User
 
Join Date: Mar 2002
Location: Sandy USA
Posts: 144
jsworkman is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

On the right side axle tube there should be a number stamped in the tube this is the bill of materials number a ford dealer should be able to tell you how your axles came loaded from the factory or post them here and I can check them in my Dana Spicer axle book.

P.S. check both tubes

__________________
John Workman
89 F350 Crew Cab Long Bed
Previous projects - 76 F250 Crew Cab Short Bed
4x4 460 C6 Dana 60 F/R.
77 Bronco 302 3spd
Jsworkman@MSN.com
Reply With Quote
  #4  
Old 03-02-2002, 09:11 AM
Art Art is offline
Senior User
 
Join Date: Jul 1999
Location: USA
Posts: 472
Art is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

If the axles weren't changed, you can use the axle code on the door tag to identify the axle ratio and a whole lot more. If no tag, rotate both tires one revolution (same direction) and count the number of driveshaft revolutions. If you can turn only one tire, rotate it two revolutions while counting driveshaft revolutions.

From what I've seen, the front axle is most likely a 4.09Dana44 and the rear axle a 4.10Dana60. Axle code for 4.09/4.10 is A4 ("locking" rear diff) or 24 (open diff). I think that was the standard ratio from about 67~77, with steeper gears (such as 4.56) being optional.

The transfer case is a NP205 if the truck originally had lockouts on the front axle. The transfer case shifter **** reads 4L N 2H 4H with a NP205. If the truck did not have lockouts originally, it has the NP203 transfer case.

The transmission is most likely a NP435 if the truck has a 4speed, or a C-6 if the truck has an auto trans.

I'll bet you the engine is/was a 360 ("Y" letter for 4th character on VIN).

Art
__________________
Lets go vintage drag racing: www.meltdowndrags.com
-
Wanted: parts for a 1930 Dodge (DD model) coupe or sedan
-
Here's one of my trucks, the rest are in my gallery...
Reply With Quote
  #5  
Old 03-03-2002, 07:23 PM
Mil1ion Mil1ion is offline
New User
 
Join Date: Jan 2008
Posts: 0
Mil1ion is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

I'm perplexed, Why would you have to turn the wheels two turns if it isn't a limited slip diff ?

ONE revolution should give the ratio regardless of it being Locking or non-locking.

Dennis http://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg



Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's"


78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon
Reply With Quote
  #6  
Old 03-06-2002, 07:55 PM
Art Art is offline
Senior User
 
Join Date: Jul 1999
Location: USA
Posts: 472
Art is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

>If no tag, rotate both tires one revolution (same
>direction) and count the number of driveshaft revolutions.



>If you can turn only one tire, rotate it two revolutions
>while counting driveshaft revolutions.



Art
__________________
Lets go vintage drag racing: www.meltdowndrags.com
-
Wanted: parts for a 1930 Dodge (DD model) coupe or sedan
-
Here's one of my trucks, the rest are in my gallery...
Reply With Quote
  #7  
Old 03-06-2002, 08:33 PM
gr8199 gr8199 is offline
Junior User
 
Join Date: Nov 2001
Location: Simi Valley USA
Posts: 93
gr8199 is starting off with a positive reputation.
Identifying axles and gear ratios on a 1974 f250!!

__________________


Don
2003 F150 SuperCrew XLT
Bright Red
Brand New!

1973 F250 3/4 ton Custom
390 .060 over w/428 Crank & Pistons
Edelbrock Performer intake
Holley 4160 carb
14" x 5" K&N Filter
Stoc
Reply With Quote
Old 03-06-2002, 08:33 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks

Tags
1974, axle, axles, f250, ford, gear, ratio, rears

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 07:36 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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