What are the Stock gear ratios are in a T-5 in an 88 Mustang
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Old October 24th, 2007, 09:12 PM   1 links from elsewhere to this Post. Click to view. #1
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What are the Stock gear ratios are in a T-5 in an 88 Mustang


Anyone know the stock gear ratios for a T-5 in an 88 mustang gt?

Are 87-93 all the same ratios? (tranny wise)
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Old October 24th, 2007, 10:30 PM   #2
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bump
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Old October 24th, 2007, 11:05 PM   #3
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no they are not all the same



this is from 86.5-89 mustangs 3.35 1.93 1.29 1.00 0.68
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Old October 24th, 2007, 11:26 PM   #4
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Ok, thanks alot. The reason I was asking was because I was comparing what the RPM would be on an 88 Mustang GT with a T-5 and T-56:

At: 85mph with stock 2.73 rearend in 5th gear with T-5

And: 85mph with 4.10 rearend in 6th gear with T-56

It seems like the RPMs are about the same.

I found this helpful website to calculate all of this if anyone is interested. The website says it's not 100% accurate, but it seems pretty damn close to me. Well here it is if no one has established this yet:

Note*: I'm not sure if this site pertains to a certain vehicle, but i don't think it matters because i tried the calculations on some other website.

http://tech.oldsgmail.com/axle_RPM.html

I'll post it on a new topic also.
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Old October 24th, 2007, 11:30 PM   #5
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this is darrells sight http://webpages.charter.net/darrell1/calculators.html
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Old October 24th, 2007, 11:37 PM   #6
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Oh, ok.......thats good to know.


Well anyway, that's gotta be pretty sick with the T-56 running a steep ass gear and still being able to cruize like normal when you want.
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Old October 24th, 2007, 11:40 PM   #7
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Ok, i've just noticed something. I'm not trying to step on toes here but on Darrel's website, it doesn't give the option of entering Tranny ratios.........does it?
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Old October 24th, 2007, 11:40 PM   #8
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Originally Posted by NYHigH
Oh, ok.......thats good to know.


Well anyway, that's gotta be pretty sick with the T-56 running a steep ass gear and still being able to cruize like normal when you want.
they are very nice transmissions but they are just so pricey
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Old October 24th, 2007, 11:46 PM   #9
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i jus went to the 1st web site (not darrels) and it says tht at 90mph in 4th gear i should be at 4392 rpm and in my car it says 5000. i've got 3.73 gears stock tranny 5spd and i put 2 different speedo gears in and they both gave the same reading. anybody no whats wrong with my car
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Old October 25th, 2007, 12:10 AM   #10
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Originally Posted by NYHigH
Ok, I just thought of something after seeing the difference in the 1st gear ratios between:

T5: 1st gear @ 3.35 ratio with stock 2.73's at 25mph= about 3000RPMs
1st gear @ 3.35 ratio with 4.10's at 25mph = about 4500RPMs

T56: 1st gear @ 2.66 ratio with 4.10's at 25mph = about 3500 RPMs


Doesn't seem like your gaining much. What's the point of spending 3gs on a T56? The whole point is the low first gear but it seems the 2.66 gear on the T56 brings it right back to stock WTF?
i would spend my money somewhere else and if a new transmission is needed i would buy a tko600 it will handle more than the t-56 but it only has 5 gears but who needs a 6th gear but if you had 4.10's you could run much faster on topend if thats what your into
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Old October 25th, 2007, 12:11 AM   #11
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Originally Posted by cali 5.0
i jus went to the 1st web site (not darrels) and it says tht at 90mph in 4th gear i should be at 4392 rpm and in my car it says 5000. i've got 3.73 gears stock tranny 5spd and i put 2 different speedo gears in and they both gave the same reading. anybody no whats wrong with my car
the stock guages are not accurate especially the tachs
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Old October 25th, 2007, 12:17 AM   #12
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i got an aftermarket tach also and they both read about the same
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