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Topic: Which speedo gear ??? (Read 2082 times) previous topic - next topic

Which speedo gear ???

O.K.,I did the T-5 swap,I have 3.55 gears.Which speedo drive gear do I need?Thanks guys.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..
 

Which speedo gear ???

Reply #2 –
Per my DIY link................... old topics of interest i saved.


MISC SPEEDO GEAR INFO
---thunderjet302
For those of you who have installed 3.73 gears with your stock AOD you know how hard
it is to find a speedo driven gear to make your speedo close to accurate. In reality a
24 tooth gear would put it dead on but a 23 tooth gear makes it with in 1-3 mph of being
correct. The only problem was that there was no 23 tooth auto trans driven gear avaliable
from Ford. You either had to use a 21 tooth gear like I did and accept the 6-7 mph
difference between what the speedo said and your actual speed or use a 23 tooth gear
for a T-5 which would wear out fast. There is a solution though. I found a 23 tooth
AOD driven gear at Mustangs unlimited. I ordered it and it looks just like my 21 tooth
gear with 2 more teeth. I installed it and vola my speedo is almost right on. Here's
the link if anyone is interested. ---thunderjet302

--turbocoupe50
Cool... But I have the later super coupe AOD with a 7 tooth output.
A 21 works fine for me.--turbocoupe50

Which speedo gear ???

Reply #3 –
Thanks a lot.I'll be looking at the gear I removed from the tranny and see if it'll work,or,just buy a new one.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

Which speedo gear ???

Reply #4 –
jcassity,I have 3.55 gears,not 3.73's.I need the little gear for those .
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

Which speedo gear ???

Reply #5 –
dont kill the messenger,,

Which speedo gear ???

Reply #6 –
No killing.I was just clarifying.I appreciate any and all help from you guys.No worries,all is good.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

Which speedo gear ???

Reply #7 –
Check this out. This is what I use to find my speedo gears.

http://www.fordracingparts.com/download/charts/129.pdf

I think the last gear I bought from Ford was 9.00. :D
Matt
1984 Thunderbird - 89 302 HO, GT40 heads w/ Trick Flow springs, E303 cam, Edelbrock Performer 289 intake and 600 cfm 4bbl, Mustang headers, Jegs o/r H pipe, Dynomax lers, Mustang AOD and shifter, Mustang 8.8 w/ 3.73s, 3G alternator, Mustang front and rear sway bars, KYB SN-95 front struts and shocks, and 11" front brakes.

1988 Mustang GT - GT40 heads, Explorer intake, 70mm throttle body, 70mm MAF, Crane 1.7 rrs, E303 cam, Kirban Kwik shifter w/ Pro 5.0 deluxe handle, aluminum clutch quadrant and firewall adjuster, o/r h pipe, Dynomax lers, 3G alternator, aluminum radiator, and 3.27 gears.
 
1986 Cougar 5.0, 1989 Mark VII LSC 5 speed, 1980 Mercury Zephyr 4 door (sold)

Which speedo gear ???

Reply #8 –
$9????? wow, you got hosed.

16T gear for mine cost me $3.25 from ford. :flip:
gumby - beauty may fade, but stupid is forever!

Which speedo gear ???

Reply #9 –
so,,
at 16tooth speedo gear for 355 rear gears?

Which speedo gear ???

Reply #10 –
Quote from: jcassity;230477
so,,
at 16tooth speedo gear for 355 rear gears?
if you are referring to my post, no. im running 3.27's

also, if you follow the link i posted you will find a calculator that shows there is more involved to pickin a speedo driven gear than just knowing the rear gear set ratio.
in other words, there is not enough information supplied in the original post to determine what driven gear the OP needs.
gumby - beauty may fade, but stupid is forever!

Which speedo gear ???

Reply #11 –
I got the info I needed from the chart shown.I should have the speedo gear in a couple of days,and I'll post the results and which gear I end up using.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..