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Fox T-Bird/Cougar Forums

General => General Fox T-Bird/Cougar Discussion => Topic started by: 88 Blackbird 5.0 on August 31, 2008, 04:45:29 PM

Title: Who here runs an AOD with 3.73 gears?
Post by: 88 Blackbird 5.0 on August 31, 2008, 04:45:29 PM
If you run this combo in your ride, what kind of RPM's are you turning at 65 MPH?  How about 55 MPH also?  Thanks in advance guys.
Title: Who here runs an AOD with 3.73 gears?
Post by: Kitz Kat on August 31, 2008, 05:03:42 PM
I did till I swaped to a t5, in od at 70 it was 2600 about 2800 in 3rd, not sure how accurate my speedo was though.
Title: Who here runs an AOD with 3.73 gears?
Post by: ZondaC12 on August 31, 2008, 05:53:07 PM
With 205/70 tires....ummm....like 2600 @ 80 mph, 2100 maybe 2200 @ 70. I got the digi-dash so its in increments of 200 rpm so yeah best guess ya know lol but I honestly dont know exactly what it is at 60/65, as you can probably imagine by the figures I gave Im terrible out there hahahhaha
Title: Who here runs an AOD with 3.73 gears?
Post by: V8Demon on August 31, 2008, 06:16:10 PM
http://www.f-body.org/gears/

Standard AOD ratios:
1st:  2.4
2nd:  1.48
3rd:  1.0
4th:  0.67
Title: Who here runs an AOD with 3.73 gears?
Post by: Sick88Tbird on August 31, 2008, 10:10:45 PM
60mph in OD was just a hair over 2000rpm.
Title: Who here runs an AOD with 3.73 gears?
Post by: 50tbrd88 on September 01, 2008, 10:07:45 AM
my speedo is about 5-6 mph off but it should be around 2000 at 60 or so.
Title: Thanks guys
Post by: 88 Blackbird 5.0 on September 01, 2008, 12:40:22 PM
That's just the info I needed.  :D
Title: Who here runs an AOD with 3.73 gears?
Post by: 88 Blackbird 5.0 on September 05, 2008, 01:31:25 PM
Quote from: Sick88Tbird;234381
60mph in OD was just a hair over 2000rpm.


Your sig says you're running a 2.73:1 rear gear.  :dunno:
Title: Who here runs an AOD with 3.73 gears?
Post by: 88 Blackbird 5.0 on September 05, 2008, 01:33:35 PM
I'm all screwed up now.  Some guys are saying they're turning around 2000 RPM's and some are saying they're turning around 2600 at 60-65 mph.  :giggle:
Title: Who here runs an AOD with 3.73 gears?
Post by: 88 Blackbird 5.0 on September 05, 2008, 01:34:24 PM
Quote from: V8Demon;234362
http://www.f-body.org/gears/

Standard AOD ratios:
1st:  2.4
2nd:  1.48
3rd:  1.0
4th:  0.67


I tried that site, but for some reason, it won't do the calculation for me.  :punchballs:
Title: Ok
Post by: 88 Blackbird 5.0 on September 05, 2008, 01:39:07 PM
Here's a good calculator I found.  http://www.angelfire.com/fl/procrastination/rear.html
Title: Who here runs an AOD with 3.73 gears?
Post by: 88 Blackbird 5.0 on September 05, 2008, 01:45:34 PM
If I went with a direct-drive AOD (lock-up), that calculator says I'd be turning about 2000 RPM's at 65 mph.  Since I'll probably go with a non direct-drive converter, I'll probably be turning around 2100-2200 RPM's at 65 mph when you factor in the slippage of the converter.  That's still not bad.  I'll just have to make sure I have a properly sized tranny cooler.
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