So since i dont have a speedo, can anyone give me a rough RPM to MPH
correlation? 35mph, 50 mph, and 80mph would be about all i really need.
Thanks!
Adam Phillips
Trenton, NJ
92 White MTX
148k? mods
>From: krazgeo@comcast.net
>To: "Adam Phillips" <adambant@hotmail.com>
>CC: shotimes@autox.team.net,<shotimes@autox.team.net> (SHOTimes)
>Subject: Re: [Shotimes] Speedo/odometer problem
>Date: Mon, 02 Oct 2006 07:44:34 +0000
>
> -------------- Original message ----------------------
>From: "Adam Phillips" <adambant@hotmail.com>
> > i
> > barely brushed the speedo cable coming out of the tranny with my
>forearm,
> > and the plastic part kinda fell apart and disconnected. ... worked again
>fine....till tonite when it dropped to zero on my
> > way home. Took a peek with the flashlight in the driveway, grabbed the
>cable
> > and wiggled, hmm, nope, still all connected and snug like it shoud be.
>So im
> > worried if somehow it stripped out whatever is inside the transmission?
>If
> > this is the case, how crazy hard would that be to fix? Any ideas or
> > suggestoins please :) Thanx!
>
>Been there...done all of that. Here's the scoop.
>
>The speedo drive gear is on a shaft that is inside the tranny case, and is
>not removable without taking the whole tranny apart. Several bearings are
>lost as they must be destroyed to disassemble the case. The replaceable
>driven gear is on the bottom of the speed sensor, which is what the lower
>short speedo cable plugs into. The sensor's main purpose is to tell the
>PCM whether the car is moving or not, for throttle control, and it is also
>the source for the cruise control. If there is binding in the speedo
>cable, the gears will take the brunt of the punishment, and the drive gear
>will wear rapidly. The upper speedo cable tends to be overheated where it
>approaches the EGR tube at the corner of the intake manifold, and will
>disintegrate over time just above the joint between it and the lower cable.
> This will initally cause bouncing of the speedo needle, and ultimately
>cause the cable to fail.
>
>If the speedo has suddenly quit, there either was binding somewhere in the
>cable assembly, or it has partially popped out of the speed sensor. The
>way to test this is to remove the cable from the sensor by pulling it up,
>then disconnecting the two cables and reconnecting the lower one to the
>sensor. This procedure takes the risk of further hurting the sensor and/or
>gears further out of the equation. With the car jacked up on one side,
>preferably the right side for convenience, spin the front wheel either by
>hand with a helper or use the engine at idle (with jackstands) to see if
>the end of the cable is turning when the transmission is rotating. If the
>gears are OK, the top of the cable as it sticks out of the housing will
>turn, and you will not be able to stop it with your fingers. If it does
>not turn, or you can stop it, your drive/driven gears are gone. That
>happened to me when I installed a Rock-Auto replacement speedo cable in my
>car a year and a half ago. I killed the
> gears within 5 minutes of trying to drive it with the new cable. With
>the cable disconnected, I could still use the cruise, as the speed sensor
>does not have enough drag to stop "my" gears from meshing. But they do not
>have the capability to turn the speedo, even with new proper Ford cables.
>I used the tach as a speedo until the car retired a few months later.
>
>To everyone.....NEVER NEVER NEVER NEVER NEVER use a Rock Auto speedo cable.
> They are totally wrong...too long, too rigid, misdesigned, and will not
>even connect to the speedo head...the plastic clip is the wrong dimension.
>It's JUNK!!!! I called them about it and the guy said "Send me pictures so
>we can improve it".....never heard from him again.
>
>George
_________________________________________________________________
Find a local pizza place, music store, museum and morethen map the best
route! http://local.live.com
_______________________________________________
Shotimes mailing list
Shotimes@autox.team.net
http://www.team.net/mailman/listinfo/shotimes
|