rear end gear ratio

[galaxie500fb]

I just recently picked up an 88 gt 5 speed stang. I lifted it on the lift the other night to get the #`s off the rear end and it seems that it has a 2.73 gear set with a posi. Did ford put such a gear setup in a 88 gt? I figured it would at least be in the 3`s. Here`s what i got for #`s off the tag. 2sl73a887m1.

[b3warnick]

My '87 LX 5.0 did indeed come with 2.73's. The optional gears were, I believe, 3.18's.

[HiFlow5 0]

Yes, 2.73's are common. The only other option for gears would be 3.08's or 3.27's. Just and FYI, Ford never installed Posi in any of thier cars. They use what's called a Limited Slip differential or Trac-Lok, and it was used in all 8.8 rears in Mustangs that had V8's.


Break down of your axle code,
2sl73a887m1;
2 73=gear ratio
sl=Trac-lok
88=rearend size
a 7m1=build date and location. If I'm reading it right, looks like March 1st 1987. Could be wrong on the exact date though.

[Mendari]

Originally Posted by HiFlow5 0

Could be wrong on the exact date though.

Just face it, you're always wrong. Just kidding.

All Hail HiFlow5 0, the Mustang Encyclopedia from New England!

[galaxie500fb]

you`re absolutely right. I flipped through the factory service manual and found a chart listing all the axle codes. I appreciate the info. Nice to know that there`s a place where my questions are answered by knowledgeable people. I`m sure i`ll have more in the near future once the weather gives.

[SkylineUSA]

Just remember if you use a Chevy term again, like "posi". You have to answer to the Great Yugo Gods in the sky

Good luck on your 88 GT

[351wStang]

LOL @ Chevy ..... Cracked Head Every Valve Rattles Oil Leaks Every Time