aNYBODY MAKE A 25 OR 26 TOOTH SPEEDO GEAR?

NEEDA5.0

Founding Member

Jun 13, 2002

563

0

0

Feb 4, 2004

#1

• Feb 4, 2004

• #1

I went with the 4.10's but now I can't find a speedo gear that will work. The only thing I can find is a 23 tooth that is made for 3.55's. I'd need more like a 25 or 26th tooth to make up for the 4.10/auto combination. Anyone seen this or know how to get around it? There is no computer recalibration on the 94, its all in the gears.

 

Rootus

Officially Addicted

Feb 8, 2003

6,659

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Portland, Oregon

Feb 4, 2004

#2

• Feb 4, 2004

• #2

Even the 23 tooth has such small teeth that they tend to break quickly, if a 25 or 26 tooth gear existed, it would be useless. The speedcal does work on 5-speeds, but I think you may be right that it won't work on autos in 94/95. Our speedos ARE electronic, though... so it's not all in the gears . Someone who's tried the speedcal with an AODE can jump in and answer the question positively.

Dave

 

94_Teal_GT

Founding Member

Aug 14, 2002

405

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0

Palm Bay, FL

Feb 6, 2004

#3

• Feb 6, 2004

• #3

I was browsing Central Florida Motorsports website and found this.
This SpeedCal corrects speedometer readings on 1994 and up Mustangs when the rear end gear or tire size has been changed. A great fix with quick, simple installation on all 1994 and up 5 speed equipped Mustangs and 1994-98 automatic equipped Mustangs. WILL NOT WORK ON '99-03 MUSTANGS WITH AUTOMATIC TRANSMISSIONS!
BTW, it's about 90 bucks there. www.c-f-m.com

 

B

Black70Fastback

New Member

Dec 14, 2003

319

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0

Dyer, IN

Feb 6, 2004

#4

• Feb 6, 2004

• #4

dont bother trying to find a gear with that many teeth. even if you find one, it wouldnt last. the teeth are too small. they would get cleaned off. you would be best off with a gear reduction box of somekind or the speedcal like teal gt said. about 90 bucks is what they generally go for anywhere.

 

Last5oh

New Member

Feb 7, 2004

6

0

0

Toronto, Canada

Feb 7, 2004

#5

• Feb 7, 2004

• #5

I have a 25 tooth I've been using since 1998. Haven't stripped any gears. Its a Chrysler (AMC) part #J3167393

Total parts cost in 1998....$1.84
The look on the parts guy's face when I told him it was going into a Mustang... PRICELESS!!!

NEEDA5.0 said:

I went with the 4.10's but now I can't find a speedo gear that will work. The only thing I can find is a 23 tooth that is made for 3.55's. I'd need more like a 25 or 26th tooth to make up for the 4.10/auto combination. Anyone seen this or know how to get around it? There is no computer recalibration on the 94, its all in the gears.

Click to expand...

 

NEEDA5.0

Founding Member

Jun 13, 2002

563

0

0

Feb 12, 2004

#6

• Feb 12, 2004

• #6

J is for Jeep? I can't find that part number in any of the online parts places. Do you remember what year/model it came from?

 

Slow5.0

Active Member

Feb 13, 2003

2,554

0

46

Portland, OR

Feb 12, 2004

#7

• Feb 12, 2004

• #7

You have to change 8-tooth Drive Gear in tranny with 6 tooth so you can use 20 tooth speedo gear here is more info http://ddperformance.com/speedo_gear_chart.htm I did same except I have 3.73s

 

Trogdor

5 Year Member

Aug 30, 2018

195

119

53

Anna, TX

Sep 24, 2018

#8

• Sep 24, 2018

• #8

Last5oh said:

I have a 25 tooth I've been using since 1998. Haven't stripped any gears. Its a Chrysler (AMC) part #J3167393

Total parts cost in 1998....$1.84
The look on the parts guy's face when I told him it was going into a Mustang... PRICELESS!!!

Click to expand...

As a member of many forums I really hate to bring this back to the top, but I need to correct some bad information. I purchased the part above and it's nothing but a 23 tooth gear. I'm only adding this post so that others may not be duped.

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

43,130

21,298

234

Box behind Walmart

Sep 24, 2018

#9

• Sep 24, 2018

• #9

Trogdor said:

As a member of many forums I really hate to bring this back to the top, but I need to correct some bad information. I purchased the part above and it's nothing but a 23 tooth gear. I'm only adding this post so that others may not be duped.

Click to expand...

You let that poor man run around with all those grinding noises for 14 years.


Welcome aboard anyway, I guess.

 

Reactions: General karthief

jozsefsz

15 Year Member

Aug 11, 2013

1,243

332

124

Cleveland OH Area

Sep 24, 2018

#10

• Sep 24, 2018

• #10

Op was probably just getting around to correcting it. 6 posts since 2004, that's impressive. With a VSS not sure why anyone would change gears to calibrate a speedo anyways.