speedo way WAY off!

8

89LX5ohhh

New Member

May 6, 2004

15

0

0

Toronto, Ontario

Jul 5, 2004

#1

• Jul 5, 2004

• #1

Help!

I don't understand how my speedo can be off so much....
When I cruise down the highway at the same pace as everyone else probably 110-120kph my speedo reads anywhere from 145-160kph. I have 373s but there's no way my speedo could be that much off with just gears...

Anyone have any ideas?

Adam

 

ECU5.0

Banned

Jan 10, 2004

1,803

1

0

raleigh, nc

Jul 5, 2004

#2

• Jul 5, 2004

• #2

yes it could be that off with 3.73s if you originally had like 2.73s. get a new speedo gear and you should be fine

 

jrichker

StangNet's favorite TOOL

In Remembrance. Thank you for your contributions

Mar 10, 2000

27,512

2,813

234

Dublin GA

Jul 5, 2004

#3

• Jul 5, 2004

• #3

Check to see if there is a speedometer shop in your area. If there is, ask about the Stewart-Warner speedometer gearbox. I believe it is either a 777 Series Drive Joint Kits and Parts or 666 Series Drive Joint Kits and Parts. It is a small gear box that fits between the speedo pickup gear on the transmission and the speedometer. It has quick change gears that allow you to choose almost any tire size and rear end gear ratio you want. This will allow you to get the accuracy with within 2%-3% or less. The drawback is that it isn't cheap.

 

super302

I'd do anything for free Bapples

May 29, 2004

2,878

1

0

Davenport, IA

Jul 6, 2004

#4

• Jul 6, 2004

• #4

you didn't put a new speedo gear in when you got the gears installed? WTF, the prob. is definately from the gears, unless you put a 140mph guage in from a 85mph guage.... new speedo gear is like 8 dollars.

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

6

99

Arkansas

Jul 6, 2004

#5

• Jul 6, 2004

• #5

Definatly get the speedo gear...like mentioned it is $8 bucks or so and is easy to replace...on the side of the transmission...

They don't make a speedo gear for the 373 for "our" T5...because the inner trans gear is an 8 tooth I believe and doesn't match well...but gets you within a few miles per hour of the actual speed traveled...I believe you get the 3:55 gear ratio speedo gear...

 

millhouse

Founding Member

May 14, 2002

1,985

0

46

Simpsonville, SC

Jul 6, 2004

#6

• Jul 6, 2004

• #6

5spd GT said:

Definatly get the speedo gear...like mentioned it is $8 bucks or so and is easy to replace...on the side of the transmission...

They don't make a speedo gear for the 373 for "our" T5...because the inner trans gear is an 8 tooth I believe and doesn't match well...but gets you within a few miles per hour of the actual speed traveled...I believe you get the 3:55 gear ratio speedo gear...

Click to expand...

Somewhere back in late 1989/early 1990, they switched the speedo gear from a 7 to 8 tooth. Mine happened to be a 7 tooth...and all that was required was a red 21 tooth speedo gear. The stock 2.73 gear is also red, so dont get them confused.