Rear End
Thread Starter
|
Junior User
Joined: Oct 1999
Posts: 55
Likes: 0
Rear End
I just bought a '78 ford rear end for my '78 Shortbed. At first all I needed was a Backing plate for the left rear wheel. Now I may want to change gears in the rear end but I don't know where to find the spec. Can anyone feel me in? How do I find out. Thanks
Bob
Bob
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Rear End
[font size="1" color="#FF0000"]LAST EDITED ON 17-May-01 AT 06:29 AM (EST)[/font][p]Assuming that this is a Ford 9" rear, there should be a metal tag attached to the left side of the carrier housing. The second line on the tag should start with either 2, 3, or even 4 followed by either a space or a letter, then two more numbers. Like this
2 72 or 3L50. First one would be 2:72, second one would be 3:50 with posi. Hope this helps. Mike
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
2 72 or 3L50. First one would be 2:72, second one would be 3:50 with posi. Hope this helps. Mike
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
Senior User
Joined: Oct 2000
Posts: 219
Likes: 0
From: Richmond USA
Rear End
If there is no tag, or too mangled to read.
You will have to put a mark on the pinion yolk and one on the axle shaft. Turn the axle shaft and count the number of revolutions the pinion yolk makes with one revolution of the axle shaft. Ex: pinion = 2.75 revs. shaft = 1 rev.
ratio = 2.75:1
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
You will have to put a mark on the pinion yolk and one on the axle shaft. Turn the axle shaft and count the number of revolutions the pinion yolk makes with one revolution of the axle shaft. Ex: pinion = 2.75 revs. shaft = 1 rev.
ratio = 2.75:1
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,3:70.1 - 9" Posi.
Senior User
Joined: Jun 1999
Posts: 265
Likes: 0
From: Greenville USA
Rear End
When you check this, jack up just one rear wheel and leave the tranny in neutral. Then spin the tire around twice and count the number of times the driveshaft spins (say 3.5 times = 3.5 ratio.)
fordmando
70 F-100 Ranger XLT 400 C6
78 F-150 4x4 400 4 on floor
George
fordmando
70 F-100 Ranger XLT 400 C6
78 F-150 4x4 400 4 on floor
George
Thread
Thread Starter
Forum
Replies
Last Post
BOB ROSS
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
12
May 12, 2025 10:41 AM
Bob at warsaw
1948 - 1956 F1, F100 & Larger F-Series Trucks
9
Mar 7, 2008 03:54 PM
newtattoobob
1983 - 2012 Ranger & B-Series
2
Aug 29, 2002 08:03 AM
