speedo is reading wrong

91cobra5.0 · February 9th, 2008, 06:15 PM

i just put some 3.73's in and now the speedo is about 10mph off, what do i need to do to fix that?

shurb125 · February 9th, 2008, 06:18 PM

You'll have to get another gear to go on the transmission end of the speedo cable, cheap and not hard to do.

91cobra5.0 · February 9th, 2008, 06:24 PM

would u mind putting up a lin to one, so that i know wt ur talking about?

kuskye25 · February 9th, 2008, 06:29 PM

i believe these are it dont quote me though ive never bought or used one, Speedometer Recalibration Gears - '79-'98 Ford Mustang

00vabchgt · February 9th, 2008, 06:31 PM

this is for a 5 speed with 3.73's

shurb125 · February 9th, 2008, 06:34 PM

Originally Posted by 91cobra5.0

would u mind putting up a lin to one, so that i know wt ur talking about?

Manual or automatic?

91cobra5.0 · February 9th, 2008, 06:37 PM

its a manual 5 speed, ok so were is this supposed to go? inside the tranny? or is it at the rear of the tranny were the drive shaft slides in?

kuskye25 · February 9th, 2008, 06:39 PM

shurb125 says end of the speedo cable sorry im no help havent put one in before

shurb125 · February 9th, 2008, 06:39 PM

Originally Posted by 91cobra5.0

its a manual 5 speed, ok so were is this supposed to go? inside the tranny? or is it at the rear of the tranny were the drive shaft slides in?

It's on the drivers side of the tranny about in the middle, just look for the speedo cable you can't miss it.

91cobra5.0 · February 9th, 2008, 06:42 PM

does it go onto the line or inside the tranny?

shurb125 · February 9th, 2008, 06:45 PM

Originally Posted by 91cobra5.0

does it go onto the line or inside the tranny?

Once you find where the cable goes into the trans you will see a 10mm bolt that holds a clip to hold the speedo cable in, take off that clip and pull out the cable you will see the gear on the end of the speedo cable that you are going to change. Take off the c-clip that holds the gear on and put your new gear on and put the c-clip back on and do reverse to reinstall the cable.

91cobra5.0 · February 9th, 2008, 06:49 PM

ok awsome thnx

Devine · February 9th, 2008, 07:03 PM

Actually for 3.73s to be accurate you have to get a new gear to go inside the t5 as well. The closest speedo gear you can get for the stock t5 is for 3:55s.

or at least I don't think you can.

e3sean · February 9th, 2008, 09:31 PM

no the forth post has a gear for 373's

Devine · February 9th, 2008, 11:21 PM

they make a gear for it, but i thought you had to change the internal mounting spot for the 3.73 speedo gear to be accurate.

Mustang Speedometer Gear Guide - Latemodel Restoration Supply i guess 90-93 wise

February 9th, 2008, 06:15 PM	#1
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,494	speedo is reading wrong i just put some 3.73's in and now the speedo is about 10mph off, what do i need to do to fix that? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

February 9th, 2008, 06:18 PM	#2
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 434	You'll have to get another gear to go on the transmission end of the speedo cable, cheap and not hard to do. __________________ 306 TFS heads stage 3 port & polished, TFS stage 2 cam, TFS Track heat intake, DSS pistons, 24# injectors, 76mm MAF, 70mm BBK/Edelbrock TB and spacer

February 9th, 2008, 06:24 PM	#3
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,494	would u mind putting up a lin to one, so that i know wt ur talking about? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

February 9th, 2008, 06:29 PM	#4
kuskye25 Regular Join Date: Dec 2007 Posts: 363	i believe these are it dont quote me though ive never bought or used one, Speedometer Recalibration Gears - '79-'98 Ford Mustang __________________ '88 Mustang GT, Long Tube Headers, Off Road H-pipe, Flowmasters w/turn downs, K&N, Under Drive Pullies, Smog delete/Ac eliminator/72" belt, Subframe connectors, 3.73 Gears '93 LX 4-banger 78k miles

February 9th, 2008, 06:37 PM	#7
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,494	its a manual 5 speed, ok so were is this supposed to go? inside the tranny? or is it at the rear of the tranny were the drive shaft slides in? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

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February 9th, 2008, 06:39 PM	#8
kuskye25 Regular Join Date: Dec 2007 Posts: 363	shurb125 says end of the speedo cable sorry im no help havent put one in before __________________ '88 Mustang GT, Long Tube Headers, Off Road H-pipe, Flowmasters w/turn downs, K&N, Under Drive Pullies, Smog delete/Ac eliminator/72" belt, Subframe connectors, 3.73 Gears '93 LX 4-banger 78k miles

February 9th, 2008, 06:42 PM	#10
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,494	does it go onto the line or inside the tranny? __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

February 9th, 2008, 06:49 PM	#12
91cobra5.0 Hardcore Enthusiast 91 mustang 266 ftlbs 191 hp (15.138 @92.91) @5000ft elevation Join Date: Jan 2008 Location: colorado springs Posts: 1,494	ok awsome thnx __________________ Fender well cold air intake, 3:73's, eibach springs, 65mm TB, electric fans, 3g upgrade, smog delete, advanced timing, MSD cap and rotor, ford racing 9mm plug wires, 75mm Pro-M MAF, flowmaster sieres 40 delta flows

February 9th, 2008, 07:03 PM	#13
Devine Regular 1992 LX 5.0 Join Date: Oct 2007 Location: Birmingham, AL Posts: 304	Actually for 3.73s to be accurate you have to get a new gear to go inside the t5 as well. The closest speedo gear you can get for the stock t5 is for 3:55s. or at least I don't think you can. __________________ WICK THE MOSTER!!!!

February 9th, 2008, 09:31 PM	#14
e3sean MM Fanatic 1988 lx 5.7 11.6@109 Join Date: Nov 2007 Location: arizona Posts: 3,565	no the forth post has a gear for 373's __________________ the only thing u will be burning by going with a 347 insted of a 331 is the guy driving the 331 MILITARY CREW USAF LUKE AFB AZ, E-5 SELECT 7995 AMMO I.Y.A.A.Y.A.S

February 9th, 2008, 11:21 PM	#15
Devine Regular 1992 LX 5.0 Join Date: Oct 2007 Location: Birmingham, AL Posts: 304	they make a gear for it, but i thought you had to change the internal mounting spot for the 3.73 speedo gear to be accurate. Mustang Speedometer Gear Guide - Latemodel Restoration Supply i guess 90-93 wise __________________ WICK THE MOSTER!!!!

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