With an AOD...??

OUTPLAYN · 04-09-2002, 01:42 PM

Which gears would you go with? With an AOD? How bad on the is the rpm's at highway speeds? Anyone try the new 3.90's?

90LxDroptop · 04-09-2002, 02:05 PM

I like my 3.73's. brought life to my stang.

OUTPLAYN · 04-09-2002, 02:15 PM

How is it at highways speeds?

Sonics2042 · 04-09-2002, 05:04 PM

3.73s

Highway acceleration is much, much better. About 2450 RPMs at 65-70.

Thanks,
DoranW

fast88 · 04-09-2002, 08:54 PM

I have been looking at the 3.90's also I have 3.27's from a aod 86 gt right now but will be making the same decision soon.I will probally go with 4.10's because my car see's the track more than the street.

My90GT · 04-09-2002, 09:21 PM

I would go with the 3.73 as long as your tranny holds up, after a few races my over drive started slipping but it had 93,000 miles on it.The gears really made a performance differance.Real easy to smoke the tires. I changed to a c4 now the gears are to low for the highway about 3000rpm at 65-70mph.

Jeff Chambers · 04-10-2002, 06:28 AM

It wasn't on the list, but my 4.30's work great with the AOD...'course mine doesn't see much, if any, street duty any more. I'm going to get my plates again this summer though.

I've got the wide ratio gearset in my AOD and that with the 4.30's have given me solid 1.50 60' times with a few down into the 1.4's. With the new motor, should see something around 1.45 60'.

With the 2.40 first gear (stock), give it all the gear you can along with all the converter you can stand.

Green9550 · 04-10-2002, 06:02 PM

I have 3.73's in my car and they are nice, but there is just not enough gear to get me off the line. I think you should go with the 4.10's, you will love the way your car comes off the line with them. Hope this helps.

-Billy

Mach 1 · 04-10-2002, 06:15 PM

4.10's without question. I had them both. The 3.73s lasted about 1.5 year, then went 4.10. MAJOR improvement. I also eliminated lock up converter, and it still not bad on the highway. Sure, it wouldnt be my first choice to drive cross country, but I take it on 2-3 hour trips on the highway with no problems

I can cruise 70 mph around 2500 RPM

MidNiteBlu 5.0 · 04-10-2002, 06:47 PM

From all the other topics about this issue i have found that 3.73's are best for manual's and 4.10's are best for AOD. THese are street car recommendations by the way. I dont think i have ever seen someone here with 3.90's

Later,
Nick

OUTPLAYN · 04-10-2002, 07:45 PM

They are the new gears from Motive Gear. They some other new gear ratio's but I have forgot them.

SkadonyaCA · 04-10-2002, 09:02 PM

I am very happy with my 3.55s, would have gone to 3.73s but got a sweet deal ($20 - 500 miles) on the 3.55s out of a new cobra. Runs about 2500 rpm at 85 mph on the freeway in overdrive

04-09-2002, 01:42 PM	#1
OUTPLAYN Registered Member Join Date: Aug 2001 Location: Genoa,IL Posts: 79	With an AOD...?? Which gears would you go with? With an AOD? How bad on the is the rpm's at highway speeds? Anyone try the new 3.90's?

04-09-2002, 02:05 PM	#2
90LxDroptop Registered Member Join Date: Jun 2001 Location: Arlington Hts. IL Posts: 315	I like... I like my 3.73's. brought life to my stang. __________________ 90 LX Convertible 5.0 AOD 3.73 Gears, Underdrive Pulleys, TransGo shift kit, A servo, Subframe Connectors, o/r h-pipe, 2 chamber flows, Pony Wheels

04-09-2002, 05:04 PM	#4
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	3.73s Highway acceleration is much, much better. About 2450 RPMs at 65-70. Thanks, DoranW __________________ What I have: 1990 Red Mustang 5.0 LX: [BBK X-Pipe]-[MAC Cat-Back Exhaust] [MAC Cold Air Intake]-[BBK Equal Shorties] [3.55 Gears]-[Cobra Intake Manifold (Upper and Lower] [E-303 Cam]-[Granetelli Mass Air Flow Sensor] [Front and rear sway bars]-[New black carpet and seats.] [Adjustable Fuel Regulator]-[T5 Conversion w/ K. Cobra Clutch/Hurst STS] [Cobra Throttle Body]-[130A Alt. Conversion] Thinking about: Aftermarket Heads! Vortech A-Trim

04-09-2002, 08:54 PM	#5
fast88 Registered Member Join Date: Mar 2002 Location: Rockingham,N.C. Posts: 80	3.90's I have been looking at the 3.90's also I have 3.27's from a aod 86 gt right now but will be making the same decision soon.I will probally go with 4.10's because my car see's the track more than the street. __________________ 88 Notchback orig. 4 cylinder car with a efi v8 swap from a wrecked 89 5.0 hatch,edelbrock performer rpm's 190/160,typhoon intake,comp cams 1.6 rockers,65mm tb and spacer,pa performance c4 w/ 3000 stall,3.73's auburn pro, 31 spline mosers,mac off road h-pipe,1 5/8 shorties ,and 2 1/2 pro dumps,kirban fpr,190 lph walbrp. SOON TO BE BLOWN!

04-09-2002, 09:21 PM	#6
My90GT Registered Member Join Date: Apr 2002 Posts: 2	I would go with the 3.73 as long as your tranny holds up, after a few races my over drive started slipping but it had 93,000 miles on it.The gears really made a performance differance.Real easy to smoke the tires. I changed to a c4 now the gears are to low for the highway about 3000rpm at 65-70mph. __________________ My90gt

04-09-2002, 02:15 PM	#3
OUTPLAYN Registered Member Join Date: Aug 2001 Location: Genoa,IL Posts: 79	How is it at highways speeds?

04-10-2002, 06:28 AM	#7
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	It wasn't on the list, but my 4.30's work great with the AOD...'course mine doesn't see much, if any, street duty any more. I'm going to get my plates again this summer though. I've got the wide ratio gearset in my AOD and that with the 4.30's have given me solid 1.50 60' times with a few down into the 1.4's. With the new motor, should see something around 1.45 60'. With the 2.40 first gear (stock), give it all the gear you can along with all the converter you can stand. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

04-10-2002, 06:02 PM	#8
Green9550 Resident Redneck Join Date: Jan 2002 Location: Cecil County, MD Posts: 165	I have 3.73's in my car and they are nice, but there is just not enough gear to get me off the line. I think you should go with the 4.10's, you will love the way your car comes off the line with them. Hope this helps. -Billy __________________ 95' GT: 306, XL Ross Pistons, Ultra Lite H-beam Rods, Forged Scat Crank, 28oz Romac, 28oz JW flexplate, FTI ported RPM II intake, FTI ported AFR 165's, FTI custom cam, 75mm BBK Throttle body, 80mm Pro-M, 4800 PI stall, PA Super Comp AODE, Strange 33 spline race axles, Strange ultra lite spool, Motive lite 4.30's, Strange rear race brakes, Mega bite seniors, double adjustable uppers w/spherical bushings, Racecraft anti-roll bar, LPW rear end girdle, Metco d/s loop, A9L conversion, AFM PMS

04-10-2002, 06:15 PM	#9
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	4.10's without question. I had them both. The 3.73s lasted about 1.5 year, then went 4.10. MAJOR improvement. I also eliminated lock up converter, and it still not bad on the highway. Sure, it wouldnt be my first choice to drive cross country, but I take it on 2-3 hour trips on the highway with no problems I can cruise 70 mph around 2500 RPM __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

04-10-2002, 06:47 PM	#10
MidNiteBlu 5.0 I got something to say Join Date: Sep 2001 Location: San Diego, CA Posts: 1,557	From all the other topics about this issue i have found that 3.73's are best for manual's and 4.10's are best for AOD. THese are street car recommendations by the way. I dont think i have ever seen someone here with 3.90's Later, Nick __________________ 91 LX Hatch 5.0 - made for the twisties 89 LX Hatchback 5.0 5spd. stolen/stripped 4/7/05 http://www.mustangworks.com/cgi-bin/...splay.cgi?3494 1987 Toyota Pickup Ricer Haters Club Member #33 Want a custom gauge cluster for your Vintage Mustang? www.jmeenterprises.com

04-10-2002, 07:45 PM	#11
OUTPLAYN Registered Member Join Date: Aug 2001 Location: Genoa,IL Posts: 79	They are the new gears from Motive Gear. They some other new gear ratio's but I have forgot them.

04-10-2002, 09:02 PM	#12
SkadonyaCA Registered Member Join Date: Mar 2002 Location: Ventura, CA USA Posts: 37	I am very happy with my 3.55s, would have gone to 3.73s but got a sweet deal ($20 - 500 miles) on the 3.55s out of a new cobra. Runs about 2500 rpm at 85 mph on the freeway in overdrive __________________ 1992 Emerald Green and Titanium Mustang GT Hatchback AOD Mods: Ford racing springs; KYB gas adjust shocks/struts; Intake (undecided); Approx. 12 degree timing; GT-40 P heads (ported); GT-40 P headers (ported); Cobra Rockers; 65 mm Throttle body; EGR spacer; 80 mm Lightning MAF; 3.55 Ford Racing Gears; CustomChip; B&M high stall torque converter; tranny cooler; fuel pressure regulator and gauge; 175 Amp Alternator; 2000 watt Audiobahn/panasonic soundsystem; CD w/Changer, 2 - 10" Aluminum Subs; audiobahn 1 farad capacitor; Dual Cut-outs just past the primary Cats; MAC cold air induction; Reverse Indiglo guages; 9mm Wires; Window tint; underdrive pulleys _ ___________________ _ 2001 Silver GT Convert. Automatic Black top