after 3:73's

RedLilPony · 03-19-2001, 10:42 PM

What do you need to do to get your speed to read correctly after you install 3:73's on a 99 GT? I've heard 2 different things and the price difference is about 100 dollars so I want to buy the right part!

------------------
Jodi
AKA PonyGirl
Red 68 GT Fastback and Black 99 GT Coupe
"Not your average Mustangs..."
http://hometown.aol.com/redlilpony/Homepage.html

StoplightWarrior · 03-20-2001, 12:00 AM

I think all you need is a speedo compensator, which is like $40-50. The place Im going to get my gears done at is 185 for the whole install, and you have to buy the speedo separately, but they'll install it for free. Good luck!

------------------
Black 2000 GT
Magnaflow Catback, K&N

StoplightWarrior · 03-20-2001, 12:27 AM

More specifically, I think you need a 23 tooth speedo gear.

Mustang92 · 03-20-2001, 08:16 AM

Actually on the 99 newer cars you can't calibrate the speedo with a gear like the T-5's. You have to but a speedo calibrator or something like that. I think Sean Hyland (overpriced) and Houston Performance sell them, or you can have a custom chip burned for them.

------------------
00 GT, MAC Offroad H, Steeda Pulleys, Steeda Timing Adjuster, FMS 4.10’s, Flows w/turndowns, UPR shifter, UPR subframes, UPR LCA’s, Air Filter, Lakewood 70/30 & 50/50, Weld Pro Stars, Nitto DR’s, 253.8RWHP/292.8RWTQ
Best on DR's 13.09@103.92 (1.81 60ft)
Best on ET Drags 12.99@104.60 (1.67 60ft)
M/M 100
88 LX coupe X-FHP, 12pt Cage, UPR K-member, 31 spline rear, full spool…

RedLilPony · 03-20-2001, 01:55 PM

I'll check out Houston Performance... they're just down the street anyway. Thanks for the help!

------------------
Jodi
AKA PonyGirl
Red 68 GT Fastback and Black 99 GT Coupe
"Not your average Mustangs..."
http://hometown.aol.com/redlilpony/Homepage.html

GTGrl00 · 03-20-2001, 02:22 PM

Hey Jodi,
I think awhile back you posted a similar question, you got some pretty solid info. you should check it out.

StoplightWarrior - I notice your from the BayArea, me too! May I ask where your getting your gears done at? Rear End Specialties in Santa Clara? Some other Stang buddies of mine got theirs done there, pretty good shop from what I hear.

------------------
Yours in SPEED=======
Mandy aka GTGRL00

StoplightWarrior · 03-20-2001, 03:47 PM

GTGrl00: Yeah, theyre getting done at Rear End Specialties. The only problem is Im strapped for cash right now, and Ive got the gears and all the steeda parts sitting in my room. I cant decide which ones to install first. Also, Im up in Sac right now, and Rear end spec. isn't open on weekends, so Id have to miss school/work in order to get the gears in. Glad to hear that youve heard good things about them though. They definitely have great install prices! Thanks.

------------------
Black 2000 GT
Magnaflow Catback, K&N

Ares · 03-20-2001, 06:53 PM

Can also be reprogrammed in computer to correct difference.

95GTS · 03-20-2001, 09:06 PM

You will need an Electronic Speedometer Compensator or get the computer chip burned and reprogrammed. The 99 up stangs to not use the speedometer gears anymore.

------------------
1996 Mustang GTS <---Must sell. $10,900 obo 56,000 miles

cravnpup · 03-21-2001, 07:34 PM

Yup, you either need an Abbott Electronic Ratio Adapter, which is what I suggest because you can always go back and adjust it in case you decide on a different gear or go with different sized tires... Or you can get your stock computer reflashed to fit your gear change. If you ever decide to change tires/gears you will have to do this again....

------------------
2000 GT Conv. 5speed
Triple Black
Current Mods: K&N, Mobile 1, MagnaPack Cat-Back, Steeda Tri-Ax, GW Subframes, 3.73's.
ET: 14.26@98.9 (K&N, Mobile1, Tri-ax)

Bad Dad · 03-25-2001, 09:34 AM

Ford will not change a stock chip, you need a Superchip or Auto Logic chip, if you go that way.

------------------
[b]'99 Cobra Electric Green/Medium Parchment Assembled 04/10/99 1464 of 4040
K Charger Filter, Nitto DR's, Steeda Tr-ax Shifter, March Pully's, 3.73 gears, Superchip
FIX Pre 255RWHP 264RWTQ Post 274RWHP 275RWTQ After Mods 307RWHP 304RWTQ
FRPP Shorty Headers, Bassani High Flow Cats to X-pipe, Dynomax Ultra Flow Cat Back
Steeda Variable Rate Springs, Tokico Illumina 5 position strut,Koni 2 way adjustable shocks,

03-19-2001, 10:42 PM	#1
RedLilPony It's been awhile, huh? Join Date: Dec 2000 Location: I'm from Texas, Bitch! Posts: 505	after 3:73's What do you need to do to get your speed to read correctly after you install 3:73's on a 99 GT? I've heard 2 different things and the price difference is about 100 dollars so I want to buy the right part! ------------------ Jodi AKA PonyGirl Red 68 GT Fastback and Black 99 GT Coupe "Not your average Mustangs..." http://hometown.aol.com/redlilpony/Homepage.html

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03-20-2001, 12:00 AM	#2
StoplightWarrior Registered Member Join Date: Jun 2000 Location: Nor-Cal Posts: 1,311	I think all you need is a speedo compensator, which is like $40-50. The place Im going to get my gears done at is 185 for the whole install, and you have to buy the speedo separately, but they'll install it for free. Good luck! ------------------ Black 2000 GT Magnaflow Catback, K&N

03-20-2001, 12:27 AM	#3
StoplightWarrior Registered Member Join Date: Jun 2000 Location: Nor-Cal Posts: 1,311	More specifically, I think you need a 23 tooth speedo gear.

03-20-2001, 08:16 AM	#4
Mustang92 Drag Racer! Join Date: Nov 1999 Location: Lake Worth, FL USA Posts: 757	Actually on the 99 newer cars you can't calibrate the speedo with a gear like the T-5's. You have to but a speedo calibrator or something like that. I think Sean Hyland (overpriced) and Houston Performance sell them, or you can have a custom chip burned for them. ------------------ 00 GT, MAC Offroad H, Steeda Pulleys, Steeda Timing Adjuster, FMS 4.10’s, Flows w/turndowns, UPR shifter, UPR subframes, UPR LCA’s, Air Filter, Lakewood 70/30 & 50/50, Weld Pro Stars, Nitto DR’s, 253.8RWHP/292.8RWTQ Best on DR's 13.09@103.92 (1.81 60ft) Best on ET Drags 12.99@104.60 (1.67 60ft) M/M 100 88 LX coupe X-FHP, 12pt Cage, UPR K-member, 31 spline rear, full spool…

03-20-2001, 01:55 PM	#5
RedLilPony It's been awhile, huh? Join Date: Dec 2000 Location: I'm from Texas, Bitch! Posts: 505	I'll check out Houston Performance... they're just down the street anyway. Thanks for the help! ------------------ Jodi AKA PonyGirl Red 68 GT Fastback and Black 99 GT Coupe "Not your average Mustangs..." http://hometown.aol.com/redlilpony/Homepage.html

03-20-2001, 02:22 PM	#6
GTGrl00 Stang Chic Extraordinaire Join Date: Dec 2000 Location: Hayward, California, USA Posts: 158	Hey Jodi, I think awhile back you posted a similar question, you got some pretty solid info. you should check it out. StoplightWarrior - I notice your from the BayArea, me too! May I ask where your getting your gears done at? Rear End Specialties in Santa Clara? Some other Stang buddies of mine got theirs done there, pretty good shop from what I hear. ------------------ Yours in SPEED======= Mandy aka GTGRL00

03-20-2001, 03:47 PM	#7
StoplightWarrior Registered Member Join Date: Jun 2000 Location: Nor-Cal Posts: 1,311	GTGrl00: Yeah, theyre getting done at Rear End Specialties. The only problem is Im strapped for cash right now, and Ive got the gears and all the steeda parts sitting in my room. I cant decide which ones to install first. Also, Im up in Sac right now, and Rear end spec. isn't open on weekends, so Id have to miss school/work in order to get the gears in. Glad to hear that youve heard good things about them though. They definitely have great install prices! Thanks. ------------------ Black 2000 GT Magnaflow Catback, K&N

03-20-2001, 06:53 PM	#8
Ares Registered Member Join Date: Oct 2000 Location: Saxonburg, PA, USA Posts: 236	Can also be reprogrammed in computer to correct difference.

03-20-2001, 09:06 PM	#9
95GTS Git jiggy Join Date: Oct 1999 Location: MO USA Posts: 865	You will need an Electronic Speedometer Compensator or get the computer chip burned and reprogrammed. The 99 up stangs to not use the speedometer gears anymore. ------------------ 1996 Mustang GTS <---Must sell. $10,900 obo 56,000 miles

03-21-2001, 07:34 PM	#10
cravnpup Registered Member Join Date: Aug 2000 Location: Torrington, CT, USA Posts: 145	Yup, you either need an Abbott Electronic Ratio Adapter, which is what I suggest because you can always go back and adjust it in case you decide on a different gear or go with different sized tires... Or you can get your stock computer reflashed to fit your gear change. If you ever decide to change tires/gears you will have to do this again.... ------------------ 2000 GT Conv. 5speed Triple Black Current Mods: K&N, Mobile 1, MagnaPack Cat-Back, Steeda Tri-Ax, GW Subframes, 3.73's. ET: 14.26@98.9 (K&N, Mobile1, Tri-ax)

03-25-2001, 09:34 AM	#11
Bad Dad Registered Member Join Date: Apr 1999 Location: Clear Lake, Ia Posts: 186	Ford will not change a stock chip, you need a Superchip or Auto Logic chip, if you go that way. ------------------ [b]'99 Cobra Electric Green/Medium Parchment Assembled 04/10/99 1464 of 4040 K Charger Filter, Nitto DR's, Steeda Tr-ax Shifter, March Pully's, 3.73 gears, Superchip FIX Pre 255RWHP 264RWTQ Post 274RWHP 275RWTQ After Mods 307RWHP 304RWTQ FRPP Shorty Headers, Bassani High Flow Cats to X-pipe, Dynomax Ultra Flow Cat Back Steeda Variable Rate Springs, Tokico Illumina 5 position strut,Koni 2 way adjustable shocks,