Speedometer Problems.....150mph in 2nd GEAR!!!!!!

nmcgrawj

Advanced Member

Sep 28, 2003

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68

Indianapolis, IN

May 24, 2007

#1

• May 24, 2007

• #1

So I just got the car back together and running, drove it to the exhaust shop and the speedometer is like 4 times as fast as it should be. I didnt mess with the tranny at all....just unplugged the harness and plugged it back in when the tranny was back in. Its a TKO600 and i have a 3.73 in the back. Never had this problem before. Any ideas?:SNSign:

 

Numbles

Active Member

Dec 10, 2003

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Chicago, IL

May 24, 2007

#2

• May 24, 2007

• #2

The tko uses a different drive gear than a t-5. Add the fact that you are using a 3.73 and its for sure going to be way off.

http://www.ddperformance.com/speedo_gear_chart.htm

Use this link to figure out which gear you need and first find out which drive gear you TKO has in it.

 

Therian

The Highlander

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Apr 21, 2002

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May 24, 2007

#3

• May 24, 2007

• #3

Welcome back Nate.

 

C

cbarr300

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goose creek, SC

May 25, 2007

#4

• May 25, 2007

• #4

take it off, clean it off, put it back, report back

other than that...idk

best of luck

 

HISSIN50

"How long does it take to get help in here?

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May 25, 2007

#5

• May 25, 2007

• #5

You could have a friend safely take pictures. Having the speedo pegged will be something to show the grandkids (who will be in flying cars by then).

 

94-302-vert

Active Member

Aug 16, 2004

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NE CT

May 25, 2007

#6

• May 25, 2007

• #6

If you are at like 12k RPM this is OK... If not clean everything but I can't see why a bad connection would cause it to read fast...

Unless you are using the brothers speedcal maybe?

 

Stanger007

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Sep 26, 2001

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Baton Rouge, LA

May 25, 2007

#7

• May 25, 2007

• #7

HISSIN50 said:

You could have a friend safely take pictures. Having the speedo pegged will be something to show the grandkids (who will be in flying cars by then).

Click to expand...

View attachment 384306​

 

final5-0

Mustang Master

Apr 6, 2003

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DFW Texas

May 25, 2007

#8

• May 25, 2007

• #8

HISSIN50 said:

You could have a friend safely take pictures. Having the speedo pegged will be something to show the grandkids (who will be in flying cars by then).

Click to expand...

Hey JT

If Nate can go 150 in second gear

Does that mean

225 in 3th
and
300 in 4th
and
as that guy on the radio says
"Ludicrous Speed" in 5th

Seriously Nate
Can you provide more info on what all you have done lately that might
have caused that to happen?

Grady

 

urban96

bubb rubb says:"woo woooooo"

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Sep 24, 2002

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Syracuse, NY

May 25, 2007

#9

• May 25, 2007

• #9

the newer TKO 500/600 use the electronic speed sensor correct? they are setup for the 99+ cars where its pretty much a direct swap in.

im not sure if you can swap install a VSS thats gear driven like our cars are or not. call dallas mustang and find out. you might need a speed cal to adjust it back down

 

BlackVert

15 Year Member

Oct 3, 2003

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Bethesda, MD

May 25, 2007

#10

• May 25, 2007

• #10

welcome back!

no ideas on the speedo thing tho

 

parchisi

New Member

Apr 13, 2006

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New Mexico

May 25, 2007

#11

• May 25, 2007

• #11

the TKO 600 has a provision for the little speedo gear. Right now I'm using the stock speedo gear and stock gears (3.08) and it actually reads 5-15 mph lower than true speed. Something else has to be screwy.

 

nmcgrawj

Advanced Member

Sep 28, 2003

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68

Indianapolis, IN

May 26, 2007

#12

• May 26, 2007

• #12

First off, thanks guys .

About a month ago before my oil pressure problems everything was fine. I changed nothing on the tranny or anything that might have something to do with the speedo. My gear is the right one that matches the 3.73's. All i did was unplug it drop the tranny, drop the tranny and motor back in, and plug it back up. Not sure what can cause it....guess i'll start with cleaning it

 

1994Vib.RedGT

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Aug 19, 2004

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Denver, CO

May 26, 2007

#13

• May 26, 2007

• #13

Stanger007 said:

View attachment 384128​

Click to expand...

this is unbelieveably badass

 

HISSIN50

"How long does it take to get help in here?

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May 26, 2007

#14

• May 26, 2007

• #14

Wes, I don't wanna know what happened to your speedo It's a good look (though taking a pic at redline would be best).

Have you guys been holding back? I was thinking along the same lines as Grady. Many have 3.73:1 gears but you guys have like 0.73:1 gears.

Nate, If not mentioned, I'd just call D&D [in Wixom] or Hanlon and see what they think. They probably have a real good idea in about 2 seconds of what to check.

Good luck.

 

Stanger007

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Sep 26, 2001

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Baton Rouge, LA

May 26, 2007

#15

• May 26, 2007

• #15

HISSIN50 said:

Wes, I don't wanna know what happened to your speedo It's a good look (though taking a pic at redline would be best).

Click to expand...

Man, that is all that power I've got! Ya'll guys with T5's just don't know.

Seriously though, I think my SpeedCal is grounding out somewhere - the speedo only goes screwy about once a week. I'll look at it next weekend - we're doing a Trickflow H/C/I install and Longtube install on sage2k's car at my place this weekend.

Wes

 

nmcgrawj

Advanced Member

Sep 28, 2003

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Indianapolis, IN

May 27, 2007

#16

• May 27, 2007

• #16

Yea i'll see what D&D has to say....they're local to me anyway. About 10 minutes away....

I'll keep ya up to date

 

HISSIN50

"How long does it take to get help in here?

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May 27, 2007

#17

• May 27, 2007

• #17

Stanger007 said:

Man, that is all that power I've got! Ya'll guys with T5's just don't know.

Seriously though, I think my SpeedCal is grounding out somewhere - the speedo only goes screwy about once a week. I'll look at it next weekend - we're doing a Trickflow H/C/I install and Longtube install on sage2k's car at my place this weekend.

Wes

Click to expand...

Sounds good. If you think of it, post up if the Speedcal was the issue (you'll save future searchers ).

It seems like you and Sage are always working on something. Must be nice.

Nate, let us know how it goes.

 

Stanger007

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Sep 26, 2001

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Baton Rouge, LA

May 27, 2007

#18

• May 27, 2007

• #18

HISSIN50 said:

Sounds good. If you think of it, post up if the Speedcal was the issue (you'll save future searchers ).

It seems like you and Sage are always working on something. Must be nice.

Click to expand...

I sure will make an updated post - not sure when it'll be - the S-trim is killing me just sitting in my shop. Plus sage will be talking crap to me now that his Trickflow kit is in so a track visit is imminent.

Wes