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  #1  
Old 05-21-2009, 10:28 AM
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Default 3.73 speedometer gear

I have a 3.73 in the WI SSP and the speedometer was way off when I drove it. I checked the gear at the end of the speedometer cable and it was a 21 tooth but some of the teeth were worn off which could count for the needle wondering. What did you guys do to get the speedometer close to accurate? I read that the trans drive gear in the 93s had 8 teeth and on the chart, it indicated I would need the max of 23 tooth gear on speedometer and it would still be a bit off. They also mentioned the nylon gears last a little while and then it may break some teeth like the one I have. The other choice was to change the trans drive gear to a 6 or 7 but it is a big job. Any help would be appreciated or will I have to just live with it. Thanks
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Old 05-25-2009, 02:52 PM
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Default 3:27

I have a 93' Cobra disc brake rear in mine it has limited slip and factory 3;27 gears, in the rain you can drift on demand and in the dry it will break'em loose at will
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  #3  
Old 10-15-2009, 01:46 PM
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Quote:
Originally Posted by FHP#1357 View Post
I have a 93' Cobra disc brake rear in mine it has limited slip and factory 3.27 gears, in the rain you can drift on demand and in the dry it will break'em loose at will
I have this exact rear in my 85 (the original 7.5" rear is long gone). I like the 3.27's OK, but I am considering a gear change over the winter to 3.90's or 4.10's (keep in mind I have tall 255 BFG's out back). With the 3.90's and tall tires, my final effective gear ratio would be close to 3.73's, should I ever fix my speedo.
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Old 10-15-2009, 11:05 PM
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From experience............in the last 22 years I have run the stock 3.08 gears with ok power/accleration but,the engine will have a slight bog or lag when you shift into third at full throttle. I then installed 3.73 gears and all you do is shift,shift,shift. I personally did not like that ratio if you are going to use your car for a daily driver. I installed 3.27 gears and they are awsome! This topic is like do you like Chevys or Fords? lol lol ................Rich
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  #5  
Old 10-16-2009, 12:24 AM
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3.55's for me. well balanced. great for the street and highway with out having the R's being to high
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  #6  
Old 10-19-2009, 08:40 PM
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I went through this same decision of 3.55's or 3.73's. I finally went with 3.73 with my 5-speed. There is only approximately 200 rpm difference on the freeway @ 70 mph. As for shifting a lot, you can just about skip 1st gear when leaving the line from a stop. I origanally had 3.08's and find that the 3.73's are easier to drive. I could just not drive this car smoothly from a stop with the 3.08's.
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  #7  
Old 10-19-2009, 08:42 PM
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I should add that I have never driven a Mustang w/3.55's. If I ever get a chance, I may like them better. Who knows? It's a tough decision.
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  #8  
Old 11-15-2009, 12:20 AM
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I agree 3.55's , i drive my 91 ssp every day here in the deep south texas with 3.55's .... it's a great all around gear .
good luck ..

ssp91ssp
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