HELP!!!!!Can anyone help read rear end tags???

[HEFF733]

to make a long story short, i have a 97 obs 5-speed... the tag on the rear end reads,
S 125 N
3.55 10 2 6 H16
and in the door jam reads axle- 39 i`m assuming that i have 3.55 gears...
so i have this other truck, a 91 F-250 and i has a posi rear, i`ve been thinking about swaping them, so today crawled under to get the tag off the rear.. it reads....
2 V107L
3L55 102 OK23

tag in the door jam reads, B9 i`m geussing that the 3L55 means 3.55 gears??? if they both have the same ratio i`m swap`n the rears sunday....

any help would be great!

[z250kid]

your owners maneul should tell you i looked mine up and its 4.10
i have a 1996 ill run out to my truck for ya

[z250kid]

yes they are indeed 3.55 gears

[Soaggydogg]

Yes, the 3L55 means 3.55 Limited slip. If it doesn't have the "L" it is an open differential.

[HEFF733]

so there shouldnt be any problem swapping the complete rear end into my truck??? from what i found my rear end max cap is 6250lbs and the one out of the 91 f-250 is max cap is 5300lb should be ok, i`ll just keep mine as a spare if i rip the other one out...

[Soaggydogg]

If they are both 10.25 Sterling axles they are the same, the difference will be in the springs.

[4rcFed]

See if this helps out a bit...

I went through this when I was deciphering out a tag, on an axle that I had sold. Attached below is an explanation of the tag pictured...

S125N
S = Sterling Axle
125 = Model Numer
N = Revision Number

355 102 7A21
3.55 = Gear ratio
Open Differential (An "L" here would mean limited slip - the one below is not)
102 = Ring gear size (10.25")
7 = Year made (1997)
A = Month made (January)
21 = Date made

[HEFF733]

hmmmm... on the onlder rear end tag there is no S on the tag... it says
V 107 C but they look the same?? mine has S 125 N

[BudDog]

what about the VSS ? No Speed O