Scotty or anyone else I got a Speedo Gear Question - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 03-11-2015, 05:47 PM   #1
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
Scotty or anyone else I got a Speedo Gear Question

I'm just about to pull the trigger on a new set of Ford Racing 3:73 gears for my 98 GT I'm looking to buy the whole kit from AM $255.99

My question is my VSS is gear driven and i couldn't find anything on AM for the 98 for what gear i need to correct my speedo any chance you know?

Forget the debate on 3:73 vs 4:10 i know, i got an automatic and most suggest 4:10 even tho i only drive it locally and not much highway i just don't want the increase in RPM.
WJL is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-11-2015, 06:17 PM   #2
Registered Member
Regular
 
Slater2111's Avatar
 
Join Date: Dec 2014
Location: Jacksonville
Region: Florida
Posts: 1,001
The gear ratio calculator I just used said 20 tooth. I put 3.73 gears in my 03 auto and lost about 10mph for the same rpm when cruising. Usually I would cruise about 68mph at 2000 rpm but now just get it to 59 at 2k. So don't worry about the debate between 3.73 or 4.10.


Sent from the mothership.
Slater2111 is offline   Reply With Quote
Old 03-11-2015, 06:34 PM   #3
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
do you have a manual or automatic?
WJL is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-11-2015, 06:35 PM   #4
Registered Member
Regular
 
Slater2111's Avatar
 
Join Date: Dec 2014
Location: Jacksonville
Region: Florida
Posts: 1,001
Scotty or anyone else I got a Speedo Gear Question

Auto. I corrected my speedo by tuning. But late model restoration had a speedometer gear calculator you just plug in your cars values. And it tells you what gear you need.

Here is where I found that. I think I put in the wrong value for you car. But based it off what mine is. You should calculate your own.
http://www.latemodelrestoration.com/...ear-Calculator

Sent from the mothership.
Slater2111 is offline   Reply With Quote
Old 03-11-2015, 06:54 PM   #5
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
Thanks i cant believe i couldn't find that looks like i'm buying some gears
WJL is offline   Reply With Quote
Old 03-11-2015, 07:05 PM   #6
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: Andalusia, Spain
Region: Europe
Posts: 16,823
Nope all wrong. Anything 94-up should be corrected electronically as anything from about 1990-up used an 8 tooth drive gear until VSS went away in 1999.


You need a Speedcal box. The 98-down cars use both a VSS and OSS on the automatic trans. 99-up is OSS only for both manual and automatic. You have an 8 tooth drive gear in that 98 transmission and therefore there is no correct gear you can use after 3.27s.


Good news is that the Dallas Speedcal works great and wires right in. Or just have the speedo corrected when you get the car tuned. Your call.

The good news is that, being a 98, your car has the F7 iteration transmission that dropped late in the 1997 model year. This was the first upgrade to the 4R70w that really made it solid. The second upgrade was in 2004 only.
__________________
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 03-12-2015, 05:05 PM   #7
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
Yea that's not good news, the calc box is another $100.00 i didn't want to spend.

when you say tune, i'm assuming you are changing the algorithm in the ecu to make up the difference?

I have to ask another question late model restoration does have a calculator that say to use a 23 tooth gear, based on my specifications: Automatic, Drive gear teeth = 8, Gears = 3:73, Width= 245, Series = 45, and Dia. = 17 calculator says to use a 23 tooth gear, if i use that gear does it not fit or indicate the correct speed or will it crash and burn?
WJL is offline   Reply With Quote
Old 03-12-2015, 05:36 PM   #8
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by WJL View Post
Yea that's not good news, the calc box is another $100.00 i didn't want to spend.

when you say tune, i'm assuming you are changing the algorithm in the ecu to make up the difference?

I have to ask another question late model restoration does have a calculator that say to use a 23 tooth gear, based on my specifications: Automatic, Drive gear teeth = 8, Gears = 3:73, Width= 245, Series = 45, and Dia. = 17 calculator says to use a 23 tooth gear, if i use that gear does it not fit or indicate the correct speed or will it crash and burn?
Did you noticed the "(83-95)" with the kit description?
__________________
____________________________________________________
14 V6 auto, MCA, PP, BBK Shorties, MMD Hood Struts, Borla Touring A/B's, MAC ProChamber, aFe drop-in Filter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lets not forget, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective.
Diehard is offline   Reply With Quote
Old 03-12-2015, 05:48 PM   #9
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
yea i did but i also searched the Dallas Speedcalc Scotty mentioned and very thing i found so far says it is for manual trans only

I take that back I found one on AM for an automatic $99.00

Alright i need a vote are the 3:73s worth the $355.00 - the ME $10.00 discount $345.00 or should i buy a tuner
WJL is offline   Reply With Quote
Old 03-12-2015, 06:15 PM   #10
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Quote:
Originally Posted by WJL View Post
yea i did but i also searched the Dallas Speedcalc Scotty mentioned and very thing i found so far says it is for manual trans only

I take that back I found one on AM for an automatic $99.00

Alright i need a vote are the 3:73s worth the $355.00 - the ME $10.00 discount $345.00 or should i buy a tuner
1 vote for the tuner that can be used when you do get the gears.
__________________
____________________________________________________
14 V6 auto, MCA, PP, BBK Shorties, MMD Hood Struts, Borla Touring A/B's, MAC ProChamber, aFe drop-in Filter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lets not forget, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective.
Diehard is offline   Reply With Quote
Old 03-12-2015, 06:21 PM   #11
Registered Member
Regular
 
Slater2111's Avatar
 
Join Date: Dec 2014
Location: Jacksonville
Region: Florida
Posts: 1,001
I vote for the tuner also and then you can do the gears. Sorry about the bum info on the gear you needed. I wasn't aware they needed something different other than the gear. I knew the new edges could be tuned.


Sent from the mothership.
Slater2111 is offline   Reply With Quote
Old 03-12-2015, 06:21 PM   #12
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
Dam they just raised all the tuner prices and they are now $400.00

I did some more searching and have been told that i can change the gear to a 23 or 24 tooth and the speedo will be very close.

Gears or tuner just don't know
WJL is offline   Reply With Quote
Old 03-12-2015, 06:23 PM   #13
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
That's cool Slater i appreciate the input i think i'm going to wait for next pay and go for the tuner
WJL is offline   Reply With Quote
Old 03-12-2015, 07:55 PM   #14
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: Andalusia, Spain
Region: Europe
Posts: 16,823
No, the 23 tooth gear is a Chrysler gear and they get eaten up in a ford trans not to mention they are only "accurate" for 3.55s. People run them exactly for he reason that they cheap out... And then find a bunch of little white pieces in the trans fluid when they do a drain/fill.

You need a tune or a speedcal to correctly calibrate your speedo.

Sent from my VS985 4G using Mustang Evolution mobile app
__________________
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 03-13-2015, 02:47 PM   #15
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
I talked to a Old Ford Parts guy today, he said Ford never made a 23 tooth gear, he said they would go to Chrysler and buy them and install them in more than Mustangs.

He said he never had one come back and assumed they are or were working ok. He said he would talk to one of the guys in the shop to see what he would charge me to change it using Fords Programmer.

My point in all of this is i'm looking for a car project so for around $260.00 i got a project and gears. I will deal with the speedo after the fact. Just don't want to lay out $400.00 for a tuner right now.

Thanks to everyone for all the info and i will post my gear swap.
WJL is offline   Reply With Quote
Old 03-13-2015, 04:22 PM   #16
Registered Member
Regular
 
Steve96's Avatar
 
Join Date: Jul 2013
Location: Waterford
Region: Michigan
Posts: 2,386
I used the 23 tooth on my 410s, at least I want to say it was the 23 tooth gear. Mine are 410s but IRMC it was the most teeth I could get, I ordered it from Summit. Mine has been on for about a year and no issues yet, but It's only had about 3k miles on it and never will have a ton of miles put on it while I own the car. Going by a GPS and having my wife drive next to me my speedo is still off by about 5 MPH though so it kind of works, lol. Without it my speedo would be off by a lot more obviously. if I'm going 80+ I'm sure it would be off more. If I was going to DD the car or in the future I may get a speedcal if I have a spare 100 bucks laying around. I wouldn't worry about it too much if you want to change your gears now, get the speedo at least closer to accurate then upgrade to the speedcal at some point if it bothers you that bad. I realize you may rack up a few more miles from it being off, but depending on how much you drive it, it may not matter that much to you.

Sent from my LG-LS980 using Mustang Evolution mobile app
__________________
1996 GT
2003 GT
Follow on Instagram @manicmustangs
Follow on Instagram @steviesstangs
15% off waxgods.com use code: manic15
10% off toplabel.com use code: Manic10
Steve96 is offline   Reply With Quote
Old 03-13-2015, 05:58 PM   #17
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
I agree with you Steve i found this on Amazon http://www.amazon.com/dp/B00H4E0KQY/...29ec6cd6bbb0_S I will be ordering everything tomorrow and can't wait to get started.
WJL is offline   Reply With Quote
Old 03-13-2015, 06:34 PM   #18
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: Andalusia, Spain
Region: Europe
Posts: 16,823
Quote:
Originally Posted by WJL View Post
I agree with you Steve i found this on Amazon http://www.amazon.com/dp/B00H4E0KQY/...29ec6cd6bbb0_S I will be ordering everything tomorrow and can't wait to get started.
That's the Chrysler gear, it will get eaten up in your trans... People like me have been doing this for damn near 20 years now and I've had multiple 23 tooth gears get eaten on me before I finally got it through my thick head that they are not a good item to use.

Also... they are listed for 3.55/3.73/4.10 gears... not going to be accurate for all 3. You need to calibrate via electronic means, period. Or you can have a bunch of white plastic pieces floating around in your trans fluid.
__________________
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 03-13-2015, 07:02 PM   #19
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
I know your right, and if the Ford garage is reasonable that's what i will be doing.

Like i said earlier i cant wait to get in the garage and just do a project. i'm going to completely remove the axle strip it down paint it and more than likely some new bushing. I figure a long weekend and i will have her done

Thanks again
WJL is offline   Reply With Quote
Old 03-13-2015, 07:51 PM   #20
Registered Member
Regular
 
Steve96's Avatar
 
Join Date: Jul 2013
Location: Waterford
Region: Michigan
Posts: 2,386
Good luck. It will be a good project and you will feel a Nice difference in acceleration.

Sent from my LG-LS980 using Mustang Evolution mobile app
__________________
1996 GT
2003 GT
Follow on Instagram @manicmustangs
Follow on Instagram @steviesstangs
15% off waxgods.com use code: manic15
10% off toplabel.com use code: Manic10
Steve96 is offline   Reply With Quote
Old 03-13-2015, 10:47 PM   #21
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: Andalusia, Spain
Region: Europe
Posts: 16,823
Gears do make a big difference, just got to make sure you either DIY to prevent morons for doing a **** job or get a real good shop. I've had multiple cars that had "clunks" due to shops that just half assed it during the install.
__________________
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 03-14-2015, 10:39 AM   #22
WJL
Registered Member
Regular
 
Join Date: Jan 2014
Location: Pittsburgh
Region: Pennsylvania
Posts: 285
I just ordered my gears, i will be doing all the work myself, like Steve a don't drive my car all that much less than 600 miles last summer. I bought the gear kit from AM, hope i don't have any shipping issues.

on my way to buy an in lb beam type torque wrench right now
WJL is offline   Reply With Quote
Old 03-14-2015, 05:56 PM   #23
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: Andalusia, Spain
Region: Europe
Posts: 16,823
Make sure you have the right tools too. You need to be able to properly set the lash on the gears and shim it correctly. There are multiple vids on youtube and how-tos on the ineterwebs to help out with this.
__________________
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Scotty was right ! Frenchstang 1979-1995 Mustang GT 16 05-26-2014 06:13 PM
Fox build...Scotty, and others Sgt_Syke 1979-1995 Mustang GT 13 12-27-2013 10:27 AM
speedo gear question RoCoBass 1979-1995 Mustang GT 4 03-16-2013 04:08 AM
Speedo Gear Brent Pre-2005 V6 Mustang 15 06-23-2004 01:08 PM
410 gear speedo question Freds3.8 Pre-2005 V6 Mustang 23 07-21-2003 03:07 PM

» Like Us On Facebook



10:28 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.