rear diff i.d. tag

[Foul Al]

i'm buying a parts bronco(79) and i have pulled the rear diff. tag and want to know how to read it to see what it is? i'm hoping for a posi 9''!! any help is greatly appreciated.

 

[Justshootme84]

Look at the bottom row of numbers, that will give you the gear ratio, L/S option, and axle type. You can post your code here and someone will decipher it or check for a code chart online. An example from my 84 Bronco:

3L50 9 *** is a 3.50:1 ratio Ford 9". The "L" siginifies factory limited slip (L/S). JSM84

 

[Bronc76]

i'm buying a parts bronco(79) and i have pulled the rear diff. tag and want to know how to read it to see what it is? i'm hoping for a posi 9''!! any help is greatly appreciated.

foul al

try drivetrain.com or kevinstang.com, this may or may not help

 

[Foul Al]

foul al
try drivetrain.com or kevinstang.com, this may or may not help

hi fellas, here is the info. from my rear end tag. please help...

WFE-AY 9CC

3L50 9 624A

the nearest i can decipher is that it's a posi 3:50:1, 9''

i looked it up on a web page but they list this tag as an ''l4''? what does this mean?

any help would be awesome!! thanks guys.

 

[Justshootme84]

hi fellas, here is the info. from my rear end tag. please help...WFE-AY 9CC

3L50 9 624A

the nearest i can decipher is that it's a posi 3:50:1, 9''

i looked it up on a web page but they list this tag as an ''l4''? what does this mean?

any help would be awesome!! thanks guys.

YEs, that's the same tag numbers that I posted from my 84. The "3L50 9" designates a 3.50:1, factory L/S Ford 9" axle. The other numbers are referred to as "BOM" or Bill of Material numbers that may be needed when ordering parts, such as bearings, seals, etc. I would still verify the actual gear ratio when you remove the 'chunk' from the junkyard housing. Just count the ring gear teeth number and divide by the pinion gear tooth number, sucj as 35/10 = 3.50.

AS for the I4 listing, it's possibly the axle code for that year model axle and truck. My 84 is code "H6". I'll have to look on the 78 Bronco for the door tag code on it, even though the rear axle has been changed out. JSM84

 

[Foul Al]

YEs, that's the same tag numbers that I posted from my 84. The "3L50 9" designates a 3.50:1, factory L/S Ford 9" axle. The other numbers are referred to as "BOM" or Bill of Material numbers that may be needed when ordering parts, such as bearings, seals, etc. I would still verify the actual gear ratio when you remove the 'chunk' from the junkyard housing. Just count the ring gear teeth number and divide by the pinion gear tooth number, sucj as 35/10 = 3.50.
AS for the I4 listing, it's possibly the axle code for that year model axle and truck. My 84 is code "H6". I'll have to look on the 78 Bronco for the door tag code on it, even though the rear axle has been changed out. JSM84

thanks a bunch jsm, i need to appologize fir the misprint, it's L4 on the other site, i think it's called fordidentification.com

this is where i got the L4 from. so i need to ask now if i have a posi rear? and exactly what does that mean ''posi''? on the vin tag there is an axle code-H2A. do you know what this means ? thanks again for the info. you have been a great help!

 

[Justshootme84]

The axle code on the driver's door jamb safety sticker will also tell you what the factory axle is, the gear ratio, and if it's L/S or not. I'm failry certain that "H6" designates the 9", 3.50. L/S we're talking about. A code of "H62" would be the same rearend, but with a front L/S. Now this is based on my list for 80-96 Bronco, so the 78/79 may be different (shouldn't be, though). The metal tag attached to the diff is what I would go by, and it looks like you have the 3.50 L/S rear 9". The front D44 should have a tag bolted to the diff as well. Same process to decode it, look at the first few numbers on the bottom/ second line.

The "L" in 3L50 stands for a factory-installed Trac-Loc, which Dana makes for the Ford axles. It's a clutch-type limited slip differential or"posi" unit, meaning it will transfer about 50% of engine power to the opposite wheel when one loses grip. It's fine for light duty and keeps you from getting stuck on wet grass, JSM84

 

[Foul Al]

The axle code on the driver's door jamb safety sticker will also tell you what the factory axle is, the gear ratio, and if it's L/S or not. I'm failry certain that "H6" designates the 9", 3.50. L/S we're talking about. A code of "H62" would be the same rearend, but with a front L/S. Now this is based on my list for 80-96 Bronco, so the 78/79 may be different (shouldn't be, though). The metal tag attached to the diff is what I would go by, and it looks like you have the 3.50 L/S rear 9". The front D44 should have a tag bolted to the diff as well. Same process to decode it, look at the first few numbers on the bottom/ second line.
The "L" in 3L50 stands for a factory-installed Trac-Loc, which Dana makes for the Ford axles. It's a clutch-type limited slip differential or"posi" unit, meaning it will transfer about 50% of engine power to the opposite wheel when one loses grip. It's fine for light duty and keeps you from getting stuck on wet grass, JSM84

thanks a bunch jsm. you have been a great help! i have 1 more question.. may be dumb but does that mean that i have d44's in the rear as well as the front? and the axle code on the vin. tag says H2A. what does this mean for me? thanks again! any info. on steering column removal? i'm swapping to a tilt steering column from another 79' bronco and don't know what to expect.

 

[Justshootme84]

thanks a bunch jsm. you have been a great help! i have 1 more question.. may be dumb but does that mean that i have d44's in the rear as well as the front? and the axle code on the vin. tag says H2A. what does this mean for me? thanks again! any info. on steering column removal? i'm swapping to a tilt steering column from another 79' bronco and don't know what to expect.

No, only the front axle is a Dana44, but it will have the same gear ratio as the rear Ford 9". JSM84

 

[Red Green Jr]

the H2 refers to a 3.50 limited slip, I have the list of codes attached. However, the H2 does not say "Ford" limited slip so it may be a dana 44 or other in the rear.

 

[MIL1ION]

Same applies to the Bronco

 

[khouse]

The axle code on the driver's door jamb safety sticker will also tell you what the factory axle is, the gear ratio, and if it's L/S or not. I'm failry certain that "H6" designates the 9", 3.50. L/S we're talking about. A code of "H62" would be the same rearend, but with a front L/S. Now this is based on my list for 80-96 Bronco, so the 78/79 may be different (shouldn't be, though). The metal tag attached to the diff is what I would go by, and it looks like you have the 3.50 L/S rear 9". The front D44 should have a tag bolted to the diff as well. Same process to decode it, look at the first few numbers on the bottom/ second line.
The "L" in 3L50 stands for a factory-installed Trac-Loc, which Dana makes for the Ford axles. It's a clutch-type limited slip differential or"posi" unit, meaning it will transfer about 50% of engine power to the opposite wheel when one loses grip. It's fine for light duty and keeps you from getting stuck on wet grass, JSM84

I couldn't find the axle tag on my 77 Ranger but the metal tag on the glove box says:

TYPE BODY TRANS AXLE

U151 AB G 18J

I guess that means I'm running very low gears 2:50, if I deciphered it right!