Please interpret diff. tag numbers

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Mar 27, 2005 | 04:32 PM

frdtruc1

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From: hebron, ct

Please interpret diff. tag numbers

I am swapping the rear axle assy and need to indentify and interpret the code tag on the differential cover.
The numbers are: Top Row....Sb (could be an 8) 07D
Bottom Row... L55 889 A04 (Might be a 3 under the bolt.
1.Need to determine what type of axle assy (ratio) this is as I am going to start my search tomorrow.
2.Do junkyards normally open the diff. and inspect for broken teeth or wear?
I'd try a search myself in TECH ARTICLES but my back is killing me and I can't sit here for a long time. (thought I'd try for the sympathy vote)

Mar 27, 2005 | 05:04 PM

Txquadhunter24

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can tell ya it has a gear ratio of 3.55 with limited slip

Mar 27, 2005 | 05:18 PM

frdtruc1

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From: hebron, ct

Thank you. Perfect timing. I just got back here.
Is that enough information to go shopping Monday?
I'd still like to know what the rest of the code means if anyone has a link they can send me to, I'd appreciate it.

Mar 27, 2005 | 08:35 PM

Ponyracer

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From: Willamette Valley, Oregon

yup 355 gear ratio, Limited slip, 8.8 inch rearend. you must have an 80's-90's truck?

Mar 28, 2005 | 12:11 AM

beeboy

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From: WA

and I doubt a junkyard would open it up to inspect it.

Mar 28, 2005 | 06:43 PM

frdtruc1

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From: hebron, ct

Yes I have an 89 F150 and now I know it has 355 ratio with limited slip. Got one available and can pick up for $300. This is a complete axle assy inc drums. Now here is where I might have made a mistake. I asked if they would double check the differential to make sure the gears are all intact. (It is off the truck) What am I to do if I get it home, take off the cover and find a chipped gear or missing tooth)??? Haul it all the way back? They guarantee 90 days. Wouldn't it be in their best interest to verify it was in good shape first? Am I being unreasonable? Just curious.

Mar 28, 2005 | 07:05 PM

andym

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From: Bonita Springs FL

Open it up at the junkyard and look at it yourself. That's the best way to make sure you don't get junk.

I had a Bronco with a chipped ring gear a while ago. You couldn't tell, I drove it like that for a year or more.