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Old 08-01-2003, 03:50 PM   #1
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Question Gears, 410's or 373's?? What do you guys have??

I am looking to get some gears for my 1994 GT. The car is a five speed and I would like to still be able to go on long trips on the interstate and such without to many issues. Would you guys reccomend the 410's or the 373's?? I went for a ride in a 1995 cobra the other day with 410's and a five speed, but on the interstate at 80 he was turning 3000rpm. That seems pretty high for a sustained rpm. Give me some input on what you guys have and what you think of them. Thanx
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Old 08-01-2003, 03:51 PM   #2
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What about 3.90 gears then?

See sig for what I have (it's an AODE)
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Old 08-01-2003, 04:07 PM   #3
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I have the 3:73s and as far as gearing goes I have been happy with them. At about speedo indicated 80mph it is turning about 2500 rpms.
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Old 08-01-2003, 04:08 PM   #4
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I have 3.73 gears in my 94 Cobra. It's not bad at all, 80 mph is around 2600 rpms.
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Old 08-01-2003, 04:46 PM   #5
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373 HERE. Seems to be pretty good.
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Old 08-01-2003, 04:46 PM   #6
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3.73

I have 3.73 and they are great with running a 5 speed. I know you should go to 4.10 if your running an auto to get about the same pickup with a stick. 4.10 is not a bad choice for the 5 speed either, you'll have alot of pickup but when you getting to freeway speed your rmps will be higher.
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Old 08-01-2003, 05:54 PM   #7
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I have 373's now, but am upgrading to 410's in a the next week.
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Old 08-01-2003, 09:43 PM   #8
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Thanx for all the replys so far and keep the coming. I think I am leaning towards the 410's. I mean i hate to do it and regret not getting the 410's. Also how bad off is your speedos with the 410's??
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Old 08-01-2003, 09:56 PM   #9
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I had 3.27's stock and with 4.10's I seem to be about 10-15 mph off.
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Old 08-01-2003, 10:03 PM   #10
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i have 3.55's in my 95, i'm very happy with them as a daily driver car. i have 3.73's in my 87 coupe, and i can notice a difference but i contribute most of that to the huge weight differences.
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Old 08-01-2003, 10:04 PM   #11
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You can correct your speedo by changing out the internal speedo gear. Even with the 3.73 gear and the 23 tooth gear it will be app 5% off. I had the internal speedo gear changed (when the tranny was rebuilt) from a 8 to a 7 and have the 21 tooth, it is exact now. With 4.10 and the 23 tooth you will be app 10% off.
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Old 08-01-2003, 11:31 PM   #12
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Quote:
Originally posted by quick90coupe
Thanx for all the replys so far and keep the coming. I think I am leaning towards the 410's. I mean i hate to do it and regret not getting the 410's. Also how bad off is your speedos with the 410's??
I would definitely go with the 4.10's then. I went from 3.27 --> 3.73 because everyone said "3.73's are better for a 5-speed and 4.10's are too much gear for a stock 5.0." Well, the 3.73's were an improvement but it wasn't long before I wanted more. I swapped them out for 4.10's and have not regretted it at all. The pull in every gear is so much harder. You have to like to shift with these gears, though...cause around town you'll be doing a lot of it.

My speedo was 5 mph off @ 60 with the 3.73's, and now it's 10 mph off. I have the white 23 tooth gear and when I'm going 60 my speedo reads 70.
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Old 08-02-2003, 02:35 AM   #13
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Why can't someone make a gear that will fix the speedo with 3.73s or 4.10s correctly??
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Old 08-02-2003, 02:43 AM   #14
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Quote:
Originally posted by texsn95
Why can't someone make a gear that will fix the speedo with 3.73s or 4.10s correctly??
Because on the 23-tooth gear (the one that is closest to being correct), the teeth are so small that a lot of people find that the gear gets chewed up quickly. If they made a gear with more teeth to get the speedo more accurate for the steeper gears, it would have even thinner teeth and would not last long at all.

I believe you can correct the speed with either a Speedcal or by changing both the drive and driven gears in the tranny (not just the driven gear like most people do).
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Old 08-02-2003, 12:34 PM   #15
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get the 4.10's
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Old 08-02-2003, 01:23 PM   #16
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Thanx again for all the replys. Nice to see you chime in there at the end Mark! After riding in your cobra and hearing from these guys I am certain that I want to go with the 410's. The car will mostly be drive just around town, but when I do drive it long distances I dont see a problem with the 410's. I'll get in touch with you when I get ready to have these put in. Thanx agian to everyone.
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Old 08-02-2003, 11:03 PM   #17
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Don't fear the gear! I went from 3:55's to 4:10's and I LOVE them. Yes rpm's are a little higher on the interstate, but well worth it. You've got a V8, sustained 3,000 rpm's is no big deal. Yes I have a 5 speed.
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Old 08-03-2003, 01:47 AM   #18
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I have had 3.55's, 2.73's, 3.08's, and 4.10's. I like the pull of 4.10's, the cruising RPM's of the 2.73's, and was happy with them all. The 4.10's were definitely the funnest, but also killed any semblance of gas mileage on the highway, and will drive you crazy on the highway with the motor at 2800 to 3000 RPM's constantly.
My brother has 3.73's, and they seem to be pretty good, but the 4.10's are noticeably better in the acceleration department
You really need to think about what you want out of your car. If it is a daily driver in town, then 4.10's may be the ticket, but if you do a lot of freeway speeds, then 3.55's may be a better choice.....
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Old 08-03-2003, 05:11 PM   #19
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4.10 with an AODE here. I also used the Speecal to correct the speedo. The gears really aren't as severe as a lot of people think.
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Old 08-05-2003, 04:34 PM   #20
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So what is this speedcal that you speak of? Will it work with a 5 speed car and how much is it? Thanx
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Old 08-05-2003, 08:00 PM   #21
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Mine came with 3.27's, went to 3.73's, then 4.10's. With the 26" tall tires, and a 23 tooth, my speedo is right on the money.
Got about 12,000 miles on the speedo gear too.
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Old 08-05-2003, 08:41 PM   #22
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3.73's are the best all around compromise...you will not be unhappy with them. 4.10's will give you little if any performance gain and will have you rowing that tranny like a Olympic Kayaker.
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Old 08-05-2003, 09:08 PM   #23
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I have 3.73s with an AODE. While I would love to have more gear for around town I probably gonna drop back to 3.55s to keep the crusie rpm down. I don't drag race any more so I'd rather keep the rpms down on the long cruise.

I really wish our cars had a steeper overdrive. I had a tranny built for my 86 once that had a 0.59 overdrive ratio. That let you run alot of gear. In 5th 4.30s ran the same rpm as 3.73 with the standard .68 od ratio.
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Old 08-05-2003, 09:27 PM   #24
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On a 5sp with 410s, use a 6 tooth drive gear and a 19 tooth driven gear and it will be dead nuts accurate. You have to remove the tail shaft from the T-5 to change the drive gear but this sounds a lot worse than it actually is. If you already have the T-5 sitting there it would be a piece of cake.
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Old 08-05-2003, 09:45 PM   #25
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Quote:
Originally posted by quick90coupe
So what is this speedcal that you speak of? Will it work with a 5 speed car and how much is it? Thanx
Little electronic box that Dallas Mustang puts out. Works on any 94-up Mustang, 5spd or auto. Gives you accurate speedo no matter what gears or tire size you have.
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Old 08-05-2003, 09:48 PM   #26
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i have 3:73's in my SC347, would like to go back to 3:55 since i just light up my 295/30/18's street tires anytime i step on it
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Old 08-06-2003, 12:12 PM   #27
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Quote:
Originally posted by strokercharged95GT
i have 3:73's in my SC347, would like to go back to 3:55 since i just light up my 295/30/18's street tires anytime i step on it

Nice!

My N/A would do that with 3.55s so you may want to go to 3.27s
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Old 08-08-2003, 02:29 AM   #28
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Quote:
Originally posted by Imyourzero
I would definitely go with the 4.10's then. I went from 3.27 --> 3.73 because everyone said "3.73's are better for a 5-speed and 4.10's are too much gear for a stock 5.0." Well, the 3.73's were an improvement but it wasn't long before I wanted more. I swapped them out for 4.10's and have not regretted it at all. The pull in every gear is so much harder. You have to like to shift with these gears, though...cause around town you'll be doing a lot of it.

My speedo was 5 mph off @ 60 with the 3.73's, and now it's 10 mph off. I have the white 23 tooth gear and when I'm going 60 my speedo reads 70.
I have a stock 88 lx 5.0 5 speed. are the 4.10 gears a good choice or should I get the 3.73's. I mean the car is bone stock minus the FMS tranny (my stock t-5 took a crap). My FMS tranny came off of my project car and I'm thinking of pulling the rear end out now because it has 4.10's. I need some input. thanks all

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Old 08-08-2003, 07:29 AM   #29
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Why dont you just get 3.90's and meet in the middle of the two? Thats what I plan on puttin on my car. Only problem is FMS doesnt make them.
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