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Old 10-17-2007, 21:03   #1 (permalink)
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Just bought 89 Grand Marquis, need help!

Hey everybody, I just bought an 89 grand marquis and I was woundering what the H.P. and TQ ratings are from the factory. What type of rearend is in it? How much does it weigh? Also where can I find a cold air intake for it? All I could find is the flat drop in style filter. I wanna start moding Asap but Im not sure what will work on it. Thanks so much guys!!!
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Old 10-18-2007, 18:32   #2 (permalink)
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Re: Just bought 89 Grand Marquis, need help!

A repair manual for your vehicle will have the specs you are looking for. The manual will be a big help with your repairs and the manual can be had for fifteen to twenty bucks.
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Old 10-18-2007, 19:38   #3 (permalink)
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Re: Just bought 89 Grand Marquis, need help!

Horsepower=150
Torque=270 ft./lbs.
Rear end=8.8" Ford The rear axle ratio can be determined by looking at the sticker inside the driver's door under "AX". There'll be either a letter or a number there that will tell you what the ratio is, and whether or not it's a limited slip differential. Codes are as follows:

Open/Lock/Ratio #
-----------------------
G / H / 2.26
B / C / 2.47
8 / M / 2.73
7 / - / 3.07
Y / Z / 3.08
4 / D / 3.42
F / R / 3.45
5 / E / 3.27
6 / W / 3.73
2 / K / 3.55
A / - / 3.63
J / - / 3.85

Yours will most likely be an "8" code--2.73 open differential. If it has the 3.27 or 3.55 rear end, it most likely is equipped with the towing package, which consisted of slightly larger rear brakes, somewhat stiffer springs, and a choice of 3.27 or 3.55 axles.

Cold air intakes are not available as an off-the-shelf item, however many people have custom fabricated them using other cold air intakes.

Also, I would suggest taking a look at Grandmarq.net as they have much more information on the older cars, and will be able to answer just about any question you'd ever have. My name there is the same as my name here; tell them I sent you!

Hope this helps,

Nathan
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