rear end

[91lsc5spd]

Does anyone know what gears i have in my car and what rear end will swap into my mark. I was Led to beleive that it has 3.27 but want to know for sure. I Have a 91 lsc with a 5spd swap and it lags a little on bottom end and decided to start with gears.

 

[JoshMcMadMac]

Check the tag on the differential housing/rear axle. From that code you can determine what gear and if it is an open differential or not. To pep up the engine a bit be sure to do the free/cheap tune up steps first to get the most bang for your buck!

 

[Black87LSC]

LSC's came with a 3.27 rear, Bill Blass' got the 3.08's

 

[JoshMcMadMac]

LSC's came with a 3.27 rear, Bill Blass' got the 3.08's

Not exactly. You are overlooking the 2.73 rearend, as well as the trac-lok option, or the lack there of.

 

[NYC LS8]

Does anyone know what gears i have in my car and what rear end will swap into my mark. I was Led to beleive that it has 3.27 but want to know for sure. I Have a 91 lsc with a 5spd swap and it lags a little on bottom end and decided to start with gears.

Gears will definitely wake it up. If you go with something like 4.10s, be prepared to have first gear be an absolute joke

 

[ND4SPDLSC]

What had a 2.73?

You can also check your door jam sticker for the axle code. Post it and someone will know. An E code is a 3.27 and Trac-Lok if I remember right.

 

[Black87LSC]

Josh, there was never a 2.73 offered in the Mark VII... Only a 3.08 in the BB and 3.27 in the LSC, i'm looking at the factory sales brochure for '90 right now... Both the BB and the LSC had an optional Traction-Lok rear also

 

[JoshMcMadMac]

Josh, there was never a 2.73 offered in the Mark VII...

Yes there was. It was not for very long, though, compared to the life of the VII. It was in 1986-1987, and they probably stopped doing it when they started putting the 225HP H.O. in them. Here is what a quick search got me:

Link

 

[ILL VII]

The diesel mark also had different gears IIRC

 

[JoshMcMadMac]

The diesel mark also had different gears IIRC

True, they had a 3.73. I didn't include that, as it isn't a huge contributor and not something 99% of owners have.

 

[Black87LSC]

It was in 1986-1987,

The car in question if you remember, is a '91 LSC

 

[JoshMcMadMac]

The car in question if you remember, is a '91 LSC

That may be, but that does not change the fact that a 2.73 was offered.

 

[NYC LS8]

So were the 3.73s that you mentioned, but we know he ain't got those either

 

[JoshMcMadMac]

So were the 3.73s that you mentioned, but we know he ain't got those either

I only mentioned those because they were brought up by ILL VII.

 

[NYC LS8]

C'mon!!! I was waitin' for a "touche"!!

 

[JoshMcMadMac]

C'mon!!! I was waitin' for a "touche"!!

lol, not this time. You're pretty good at getting me, but you're not getting that elusive term out of me this time! :shifty:

 

[ILL VII]