help with tach and speedo

redalert89 · February 20th, 2007, 09:03 PM

ive got an 89 lx notch 5.0 with the 85mph cluster the speedo is off and the tach dosent work. where are the cables located on the tranny so that i can fix this...my tranny is leaking a tad bit, is that possibly from one on the cables? ...thanks

B.A.M302 · February 20th, 2007, 09:49 PM

Well first off theres no cable for the tach it runs off your - (negative) side of your coil. But your speedometer cable is located on the drivers side mid-tranny. One bolt holds a u clip around the cable.

redalert89 · February 20th, 2007, 10:39 PM

thanks alot

redalert89 · February 20th, 2007, 10:52 PM

now how do i adjust the speedo, is that bolt loose or what?

B.A.M302 · February 20th, 2007, 11:16 PM

Well the the bolt out and check the speedometer gear for broken teeth or wear. If no signs of wear your gonna have to take you instrument cluster out and check your connection at the back of the gauge. Theres a white plastic clip thats around the cable holding it in place on the gauge. If your connections good then i would replace the cable it may be broken. I'd replace the cable before you re-install the instrument cluster if the speedometer dont work after checking everything. You would have to have the instrument cluster out to replace it any ways. Its not always the cable your gauge could just be broke UNLIKELY but possible.

B.A.M302 · February 20th, 2007, 11:17 PM

I meant take the bolt out lol.

mikebert · February 21st, 2007, 03:11 AM

When I got my stang, when I was driving down the road you could usually hear this 'tick. . .tick. . ..tick .. .' like a clock. That was my needle bouncing from 0 to 140. Eventually I replaced the cable to the trans and the gear. Then my speed would only wobble +/-5 mph of my speed, maybe a little more. Usually more.

The guys I asked about said that after replacing that other hardware, the problem is in the speedo itself, on the back of the cluster. Unfortunately, I think I may have helped my speedo cable kink so now I have no speedo whatsoever. Static zero. But I still have my original tach going strong and that's all I need with my 5 speed. "No officer, I have NO IDEA how fast I was going. What's 4000 in 4th?..." etc.

So if you go fiddle with things, take a look at how the cable lies before you get started. Make sure it hangs back close to it's original location and of course if you remove it, run it back the way it came out.

redalert89 · February 21st, 2007, 12:16 PM

well my tach is dead zero so i really need to fix that. people have suggested an external but i think they're tacky...thanks guys for the help i just got this car and before i had a camaro so i dont know anything about troubleshooting the stang. much appreciated

GTXRacing · February 21st, 2007, 02:22 PM

Tacky external???

Hop on summit and search for "Digital Speedomoter" and have a look.

redalert89 · February 21st, 2007, 09:06 PM

alright it dosent look too awful bad, but if i have a working tach on my cluster...which i dont and am trying to fix...then i would go external

Darrell · February 21st, 2007, 09:13 PM

Do you have different gears in the rear end? That will make your speedometer way off.

redalert89 · February 21st, 2007, 10:42 PM

nope its a 4cyl cluster and stock rear, the previous owner said its not off it just jumps due to the bent u-joint...and by the way how high on my list of things to do should the rearend be? it needs an 8.8, headers, powersteering pump, carb and paint in order to be ready for some poweradders. should i go rear then paint or vise-versa?

Tony_90fox · February 21st, 2007, 10:54 PM

paint has never been important to me. I would take performance over looks anyday...Kinda like a sleeper to me.

redalert89 · February 21st, 2007, 11:15 PM

yeah sleepers are nice. but on one hand, if the essentials are there to make it run good, why not make it look good right ups the value. On the other hand yeah just like you said somthing that out performs its looks by far would be great too. i dont know which way to go, how fragile is the 7.5 rearend i break somthing all stock?

Tony_90fox · February 21st, 2007, 11:31 PM

I would put an 8.8 in there before anything...especially if you plan on modding it. I don't know if you have listed your mods or plans for the car...i forget easily...but an 8.8 would really be needed if you plan on modding this car.

Darrell · February 22nd, 2007, 07:03 AM

Originally Posted by redalert89

nope its a 4cyl cluster and stock rear, the previous owner said its not off it just jumps due to the bent u-joint...and by the way how high on my list of things to do should the rearend be? it needs an 8.8, headers, powersteering pump, carb and paint in order to be ready for some poweradders. should i go rear then paint or vise-versa?

Speedometer "jumping" is usually a bad speedometer cable.

redalert89 · February 22nd, 2007, 07:10 PM

ok ill chech that out thanks

Darrell · February 22nd, 2007, 09:31 PM

Also a "bent" u-joint will not have any effect on the speedometer reading.

redalert89 · February 22nd, 2007, 10:12 PM

yeah i understand i thought that was a little out there.. he just thought since the whole car shakes that it had somthing to do with it but yeah im with ya thanks

February 20th, 2007, 09:03 PM	#1
redalert89 Regular Join Date: Feb 2007 Posts: 55	help with tach and speedo ive got an 89 lx notch 5.0 with the 85mph cluster the speedo is off and the tach dosent work. where are the cables located on the tranny so that i can fix this...my tranny is leaking a tad bit, is that possibly from one on the cables? ...thanks

February 20th, 2007, 09:49 PM	#2
B.A.M302 Regular Join Date: Jan 2007 Location: maryland Posts: 89	Well first off theres no cable for the tach it runs off your - (negative) side of your coil. But your speedometer cable is located on the drivers side mid-tranny. One bolt holds a u clip around the cable. __________________ Crate 302, Trick Flow Intake R, 75mm MAF, bbk 75mm throttle body, bbk 76mm EGR spacer, 351 Winsor heads ported and polished by Bennet Racing, Lunati cam, 30 pd. Injectors, TKO 500, aluminum drive shaft, bbk mid length headers, bbk off road H pipe, 3:55,

February 20th, 2007, 11:16 PM	#5
B.A.M302 Regular Join Date: Jan 2007 Location: maryland Posts: 89	Well the the bolt out and check the speedometer gear for broken teeth or wear. If no signs of wear your gonna have to take you instrument cluster out and check your connection at the back of the gauge. Theres a white plastic clip thats around the cable holding it in place on the gauge. If your connections good then i would replace the cable it may be broken. I'd replace the cable before you re-install the instrument cluster if the speedometer dont work after checking everything. You would have to have the instrument cluster out to replace it any ways. Its not always the cable your gauge could just be broke UNLIKELY but possible. __________________ Crate 302, Trick Flow Intake R, 75mm MAF, bbk 75mm throttle body, bbk 76mm EGR spacer, 351 Winsor heads ported and polished by Bennet Racing, Lunati cam, 30 pd. Injectors, TKO 500, aluminum drive shaft, bbk mid length headers, bbk off road H pipe, 3:55,

February 20th, 2007, 11:17 PM	#6
B.A.M302 Regular Join Date: Jan 2007 Location: maryland Posts: 89	I meant take the bolt out lol. __________________ Crate 302, Trick Flow Intake R, 75mm MAF, bbk 75mm throttle body, bbk 76mm EGR spacer, 351 Winsor heads ported and polished by Bennet Racing, Lunati cam, 30 pd. Injectors, TKO 500, aluminum drive shaft, bbk mid length headers, bbk off road H pipe, 3:55,

February 21st, 2007, 02:22 PM	#9
GTXRacing Enthusiast Join Date: Apr 2006 Location: Greenville, Texas Posts: 734	Tacky external??? Hop on summit and search for "Digital Speedomoter" and have a look. __________________ THE BEAST IS FOR SALE!!! GTX RACING & PERFORMACE CLUB OF TEXAS Meets and greets, drag racing and good eats, you know you want it. GTX Racing Tony P. 214-257-3635 http://www.moddedmustangs.com/forums...vehicle&CID=43

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February 20th, 2007, 10:39 PM	#3
redalert89 Regular Join Date: Feb 2007 Posts: 55	thanks alot

February 20th, 2007, 10:52 PM	#4
redalert89 Regular Join Date: Feb 2007 Posts: 55	now how do i adjust the speedo, is that bolt loose or what?

February 21st, 2007, 03:11 AM	#7
mikebert Enthusiast Join Date: Oct 2006 Location: Augusta, GA Posts: 906	When I got my stang, when I was driving down the road you could usually hear this 'tick. . .tick. . ..tick .. .' like a clock. That was my needle bouncing from 0 to 140. Eventually I replaced the cable to the trans and the gear. Then my speed would only wobble +/-5 mph of my speed, maybe a little more. Usually more. The guys I asked about said that after replacing that other hardware, the problem is in the speedo itself, on the back of the cluster. Unfortunately, I think I may have helped my speedo cable kink so now I have no speedo whatsoever. Static zero. But I still have my original tach going strong and that's all I need with my 5 speed. "No officer, I have NO IDEA how fast I was going. What's 4000 in 4th?..." etc. So if you go fiddle with things, take a look at how the cable lies before you get started. Make sure it hangs back close to it's original location and of course if you remove it, run it back the way it came out.

February 21st, 2007, 12:16 PM	#8
redalert89 Regular Join Date: Feb 2007 Posts: 55	well my tach is dead zero so i really need to fix that. people have suggested an external but i think they're tacky...thanks guys for the help i just got this car and before i had a camaro so i dont know anything about troubleshooting the stang. much appreciated

February 21st, 2007, 09:06 PM	#10
redalert89 Regular Join Date: Feb 2007 Posts: 55	alright it dosent look too awful bad, but if i have a working tach on my cluster...which i dont and am trying to fix...then i would go external

February 21st, 2007, 09:13 PM	#11
Darrell Asshole™ 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,762	Do you have different gears in the rear end? That will make your speedometer way off. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

February 21st, 2007, 10:42 PM	#12
redalert89 Regular Join Date: Feb 2007 Posts: 55	nope its a 4cyl cluster and stock rear, the previous owner said its not off it just jumps due to the bent u-joint...and by the way how high on my list of things to do should the rearend be? it needs an 8.8, headers, powersteering pump, carb and paint in order to be ready for some poweradders. should i go rear then paint or vise-versa?

February 21st, 2007, 11:15 PM	#14
redalert89 Regular Join Date: Feb 2007 Posts: 55	yeah sleepers are nice. but on one hand, if the essentials are there to make it run good, why not make it look good right ups the value. On the other hand yeah just like you said somthing that out performs its looks by far would be great too. i dont know which way to go, how fragile is the 7.5 rearend i break somthing all stock?

February 22nd, 2007, 07:10 PM	#17
redalert89 Regular Join Date: Feb 2007 Posts: 55	ok ill chech that out thanks

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February 22nd, 2007, 09:31 PM	#18
Darrell Asshole™ 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,762	Also a "bent" u-joint will not have any effect on the speedometer reading. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

February 22nd, 2007, 10:12 PM	#19
redalert89 Regular Join Date: Feb 2007 Posts: 55	yeah i understand i thought that was a little out there.. he just thought since the whole car shakes that it had somthing to do with it but yeah im with ya thanks