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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Reading my Diff tag

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Old Oct 26, 2009 | 02:23 AM
  #1  
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Reading my Diff tag

First off, the tag says-

V127A (top line)
L55 10 2 5F1 (bottom)

IIRC, the L55 means the diff came with a Limited Slip and 3.55 gears, right?

Is there any other pertinent info in there?

If my rear end is a LSD, it's clutches must be long gone. I can light off one tire fires all day long on accident, it feels like a open diff.
 
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Old Oct 26, 2009 | 04:55 AM
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yup. 3.55 LSD

 
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Old Oct 26, 2009 | 07:49 AM
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there should be a 3 in ft of the L55 but its usually partially covered by the bolt that holds the tag on the rear
 
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Old Oct 26, 2009 | 06:35 PM
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I re-sealed the differential yesterday, and I tried to clean the tag off as best I could, but that was all I could see. I think the 3 was probably crushed by the bolt or worn off long ago, I wasn't the first person to have that cover off

I need to add some LSD additive I suppose. I was told based on my door tag that it was a 3.55 LSD, but it's always behaved like a open diff, untill my fluid change. It isn't chattering, never has, but it used to do one-tire burnouts with ease, and it hasn't since I did all the fluids over the weekend. I did do a nice 2 tire burnout today though
 
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Old Oct 26, 2009 | 10:02 PM
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I get the BG stuff, it's around $10/tube at NAPA.
 
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