|
Author
|
Topic: my spedometer is way off
|
FISH
¯
Member # 10442
|
posted
 
 
I installed 410 gears on my 1992 fox with an aod. Now my speedometer shows 100mph when I am going 70mph. This is with a 21 tooth speedo gear. Is there anything I can do to correct this? Has anyone used a mechanical speedo adapter?
Posts: 55 | From: SAN FRANCISCO | Registered: Nov 2010
| :
|
|
Sydewayz_Stan
¯
Member # 10217
|
posted
Change the plastic speedo gear in the tailshaft
--------------------
-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
| :
|
|
Blind
2.3L
CAFords OG
Member # 3052
|
posted
best to use a custom speedo adapter, I tried using a 23t speedo gear in my wife's `91 AOD, and the first gear got chewed up backing out of the driveway, the next 23t I tried lasted a week and then anything over 50mph it read 120+, half the teeth got chewed up on that one.
pretty fun to have to flush the trans fluid because of a stupid speedo gear.
the other way, as mentioned is changing the drive gear in the trailshaft.
--------------------
89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
| :
|
|
FISH
¯
Member # 10442
|
posted
Where did you get your adapter? How much?
Posts: 55 | From: SAN FRANCISCO | Registered: Nov 2010
| :
|
|
Blind
2.3L
CAFords OG
Member # 3052
|
posted
not using one, on my wifes car I put 3.55's into it with the AOD and just live with the 21t speedo gear being a little bit off on the freeway, it's not much.
--------------------
89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
| :
|
|
MauriSSio
¯
Member # 9943
|
posted
become a math wiz and just multiply your speedometer speed by 0.7 and youll be ok!
Posts: 503 | Registered: Apr 2010
| :
|
|
Email this post to someone!
Printer friendly view of this Ford topic
