89 formula 350
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Junior Member
Joined: Mar 2005
Posts: 4
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From: wisconsin
Car: 89 formula 350
Engine: 5.7 tpi
Transmission: 700R4
89 formula 350
i have a formula 350 5.7 tpi. has any one put a locker kit in the rear end to get rid of there limited slip. i think it is a 9.5 inch rear with 2.73 gears and it just dosent seem like i cant. put the power to the pavement. the cars has about 305hp with 450 pounds of tork. any ideas????
Last edited by voices_say; Jul 22, 2005 at 12:27 AM.
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Joined: Aug 2001
Posts: 265
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From: Massachusetts
Car: '90 Mercury Grand Marquis GS
Engine: 5.0L Ford V8
Transmission: AOD
Axle/Gears: 8.8" Ford, 3.08:1
Let's go over your info again because I'm a little slow. You have an '89 Formula 350 with . I have a few questions. Do you know these numbers for a fact, where's your dyno sheet? I'd stick with a limited slip, you probably won't like a locker. How often do you go to the strip? What kind of tires are you using? What the condition of your suspension? What your technique for launching off the line? Answer a few or all of my questions and we can help you out. Your car more than likely has a 7.5" GM 10-Bolt with 2.73s or a 9-Bolt with 2.77s.
"...305hp with 450 pounds of tork..."
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Joined: May 2004
Posts: 4,345
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From: Brighton, CO
Car: '72 Chevy Nova
Engine: Solid roller 355
Transmission: TH350
Axle/Gears: 8.5" 10-bolt 3.73 Posi
unless you have done some modding to that 350, it does NOT have 305 hp, and 450 ft-lbs tq.
Joined: Feb 2001
Posts: 13,777
Likes: 567
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Your problems aren't in the differential they are in your suspension. You don't want a lock for a street driven car. You need rear suspension mods to plant that power to the ground. What mods do you have?
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Joined: Aug 2004
Posts: 1,327
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Car: 1987 IROC-Z Camaro
Engine: 5.7 350 TPI - SLP Runners, AFPR, MSD Goodies
Transmission: 700R4 - Shift Kit, Corvette Servo
Axle/Gears: BW 9 bolt, 3.27s
.
Not unless it's a built, carbed motor with one hella custom cam
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Joined: Mar 2002
Posts: 522
Likes: 9
From: Sunset, Utah
Engine: None
Transmission: None
Here's a fine example of Americas great education system. You should at least know how to spell before using a computer or posting on a message board for that matter.
Last edited by 89FRMLA350; Aug 1, 2005 at 09:19 AM.
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Joined: Mar 2001
Posts: 560
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From: Gary, Indiana
Car: 00 Trans Am/89 IROC
Engine: LS1/L98
Transmission: 4L60/700R4
Man, you guys are a little rough on him
If your car is street driven, you will not want or like a locker in the diff..... stick with the limited slip and as posted earlier, work on suspension mods.
If your car is street driven, you will not want or like a locker in the diff..... stick with the limited slip and as posted earlier, work on suspension mods.
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