AOD Gear Ratios?

Nixon1 · 03-05-2003, 10:22 PM

What are the stock gear ratios in the AOD transmission? It's in a 91 GT. I assume they're somewhere in the 3:1, 2:1, 1:1, .6:1 neighborhood...anyone know exactly what they are? I've just been curious.

briand · 03-06-2003, 09:09 AM

i believe it is 2.4 1st, 1.4 2nd, 1.0 3rd, and .68 4th

Nixon1 · 03-06-2003, 04:50 PM

Are you serious? That's wimpy as hell! God.... Funny thing is, 2nd gear seems geared just right...but third gear feels too far. And Overdrive...ugh...longest, sloppiest shift I've ever seen...

briand · 03-07-2003, 11:04 AM

Yeah it does suck don't it, that's why i got rid of the aod and went to the 5 speed. but i know art carr makes a gear set for the aod that helps some, i think it comes with a 2.8 1st gear and 1.56 2nd gear and the same 3rd and 4th gear as the original gear

Nixon1 · 03-07-2003, 02:04 PM

Oh wow..I didn't know you can replace tranny gears when you're doing a rebuild.. I hate these stock ratios...I mean a 2.4 first gear is TALL....wayyy tall. Ok, add that to the list. Current tranny fix list for another year or two down the road, is:
Rebuild job
TransGo Shift Kit
Manual Valvebody
Hurst Shifter Assembly
*Art Carr Gears

briand · 03-07-2003, 03:31 PM

hey nixon, i have an old super magazine where art carr does a whole rebuild to an aod. they replace the gears, add a one piece input shaft, install shift kit, cooler, plus put in a new torque convertor. i was going to go this route before i decided to put in a 5 speed, but let me know i can maybe fax you this article if you want it. i would scan it, but i don't have a scanner or an idea of how to scan. take it easy bud

brian

Nixon1 · 03-07-2003, 11:06 PM

Thanks man... God if I had the money, I'd rebuild it right now. But I'm broke..so...it's getting rebuilt when it's about to blow. Already had to spend a LOT of cash to fix this engine...had a LOT wrong with it...tranny is getting built once I get the $2000 paid off.

bircky311 · 03-09-2003, 07:12 PM

I kinda thought that the ratios were 2.4 first, 2.46 second, and then 1/1 and .68/1 third and fourht... My 2 cents...

Nixon1 · 03-09-2003, 11:30 PM

Do you mean 3.4:1 first? Lol, 2.4:1 first and 2.46:1 second sounds a tad funny to me!

bircky311 · 03-10-2003, 12:24 AM

I prolly should proof read my posts, huh... I meant 1.46 for second... I'm pretty sure it's (aod) a little closer, with a higher(numericaly lower) first gear than a C-4 or C-6 which were 2.46, 1.46, 1.0. not sure though... ok. that's my modified two cents... I guess that makes it three?

03-05-2003, 10:22 PM	#1
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	AOD Gear Ratios? What are the stock gear ratios in the AOD transmission? It's in a 91 GT. I assume they're somewhere in the 3:1, 2:1, 1:1, .6:1 neighborhood...anyone know exactly what they are? I've just been curious. __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

03-06-2003, 09:09 AM	#2
briand Registered Member Join Date: Mar 1999 Location: Jackson, LA Posts: 264	i believe it is 2.4 1st, 1.4 2nd, 1.0 3rd, and .68 4th __________________ GT-40X heads(58cc), Cobra upper and lower, 75 mm Bullet, Moroso fenderwell induction, FRPP 65mm TB, 24# injectors, black magic electric fan, phenolic spacer, 1.7 crane cobra roller rockers, crane 2031, BBK 1 5/8 equal length hearders, 2.5 inch off road pipe, 2.5 flowmaster catback, FMS 3.55 gears, T5-Z transmission, FRPP aluminum driveshaft, svo heavy duty clutch, mcleod bullet proff bellhousing, BBK adjustable cluth quadrant, hurst billet shifter, lakewood subframes, BBK strut tower brace, BBK 2pt lower cross bar, FMS 190 lph fuel pump, crane ps91 coil, FMS street pulleys, and 300+ race wires. All thanks goes to my wife sheri, jason, jeff, robby, my dad and all others you helped contribute. most importantly GOD!!!

03-06-2003, 04:50 PM	#3
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Are you serious? That's wimpy as hell! God.... Funny thing is, 2nd gear seems geared just right...but third gear feels too far. And Overdrive...ugh...longest, sloppiest shift I've ever seen... __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

03-07-2003, 11:04 AM	#4
briand Registered Member Join Date: Mar 1999 Location: Jackson, LA Posts: 264	Yeah it does suck don't it, that's why i got rid of the aod and went to the 5 speed. but i know art carr makes a gear set for the aod that helps some, i think it comes with a 2.8 1st gear and 1.56 2nd gear and the same 3rd and 4th gear as the original gear __________________ GT-40X heads(58cc), Cobra upper and lower, 75 mm Bullet, Moroso fenderwell induction, FRPP 65mm TB, 24# injectors, black magic electric fan, phenolic spacer, 1.7 crane cobra roller rockers, crane 2031, BBK 1 5/8 equal length hearders, 2.5 inch off road pipe, 2.5 flowmaster catback, FMS 3.55 gears, T5-Z transmission, FRPP aluminum driveshaft, svo heavy duty clutch, mcleod bullet proff bellhousing, BBK adjustable cluth quadrant, hurst billet shifter, lakewood subframes, BBK strut tower brace, BBK 2pt lower cross bar, FMS 190 lph fuel pump, crane ps91 coil, FMS street pulleys, and 300+ race wires. All thanks goes to my wife sheri, jason, jeff, robby, my dad and all others you helped contribute. most importantly GOD!!!

03-07-2003, 02:04 PM	#5
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Oh wow..I didn't know you can replace tranny gears when you're doing a rebuild.. I hate these stock ratios...I mean a 2.4 first gear is TALL....wayyy tall. Ok, add that to the list. Current tranny fix list for another year or two down the road, is: Rebuild job TransGo Shift Kit Manual Valvebody Hurst Shifter Assembly *Art Carr Gears __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

03-07-2003, 03:31 PM	#6
briand Registered Member Join Date: Mar 1999 Location: Jackson, LA Posts: 264	hey nixon, i have an old super magazine where art carr does a whole rebuild to an aod. they replace the gears, add a one piece input shaft, install shift kit, cooler, plus put in a new torque convertor. i was going to go this route before i decided to put in a 5 speed, but let me know i can maybe fax you this article if you want it. i would scan it, but i don't have a scanner or an idea of how to scan. take it easy bud brian __________________ GT-40X heads(58cc), Cobra upper and lower, 75 mm Bullet, Moroso fenderwell induction, FRPP 65mm TB, 24# injectors, black magic electric fan, phenolic spacer, 1.7 crane cobra roller rockers, crane 2031, BBK 1 5/8 equal length hearders, 2.5 inch off road pipe, 2.5 flowmaster catback, FMS 3.55 gears, T5-Z transmission, FRPP aluminum driveshaft, svo heavy duty clutch, mcleod bullet proff bellhousing, BBK adjustable cluth quadrant, hurst billet shifter, lakewood subframes, BBK strut tower brace, BBK 2pt lower cross bar, FMS 190 lph fuel pump, crane ps91 coil, FMS street pulleys, and 300+ race wires. All thanks goes to my wife sheri, jason, jeff, robby, my dad and all others you helped contribute. most importantly GOD!!!

03-07-2003, 11:06 PM	#7
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Thanks man... God if I had the money, I'd rebuild it right now. But I'm broke..so...it's getting rebuilt when it's about to blow. Already had to spend a LOT of cash to fix this engine...had a LOT wrong with it...tranny is getting built once I get the $2000 paid off. __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

03-09-2003, 07:12 PM	#8
bircky311 Registered Member Join Date: Feb 2003 Location: Butler, PA Posts: 19	I kinda thought that the ratios were 2.4 first, 2.46 second, and then 1/1 and .68/1 third and fourht... My 2 cents... __________________ '89 Grand Marquis. Soon to have HO conversion and 3.27s on a trac lok diff "Hot rodding a Grand Marquis is a little like making bourbon out of Geritol." said by John Phillips about the Mercury Marauder. Car and Driver, July 2002.

03-09-2003, 11:30 PM	#9
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Do you mean 3.4:1 first? Lol, 2.4:1 first and 2.46:1 second sounds a tad funny to me! __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

03-10-2003, 12:24 AM	#10
bircky311 Registered Member Join Date: Feb 2003 Location: Butler, PA Posts: 19	I prolly should proof read my posts, huh... I meant 1.46 for second... I'm pretty sure it's (aod) a little closer, with a higher(numericaly lower) first gear than a C-4 or C-6 which were 2.46, 1.46, 1.0. not sure though... ok. that's my modified two cents... I guess that makes it three? __________________ '89 Grand Marquis. Soon to have HO conversion and 3.27s on a trac lok diff "Hot rodding a Grand Marquis is a little like making bourbon out of Geritol." said by John Phillips about the Mercury Marauder. Car and Driver, July 2002.

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