Speedo Gear

[KStromberg]

I was sold a chit transmission back in 2010 which puked out late 2010. The shoddy mechanic that was responsible agreed to put in the transmission that is in the car now which was a lower mileage transmission out of a 99 Crown Victoria from a local salvage yard that I had to pay for.

Now here's where we get onto topic. I remember pulling the speedo gear out of the VSS on the old transmission and in a short period of time the teeth were mostly broken and missing. Now I have been rocking the hell out of this newer transmission for well over a year and to my surprise this last weekend I went to pull the speedo gear out of the VSS and the gear was COMPLETELY INTACT.

So for all of you out there that have the 23-tooth speedo gear used for higher gearsets, if the gear is going to chit in a short period of time, you might want to suspect the transmission as the reason. I am going off the theory that it was possible that there was internal balance issues inside the previous transmission which caused accelerated wear on the plastic speedo gear that rides on the metal output shaft.

Maybe I'm wrong, but nevertheless it is interesting. And this is after an intake swap and going from 4.10s to 4.30s. Still, my speedo gear is perfectly intact. :shifty:

 

[mossbergman]

so why did you go with a speedo gear anyway?? i have 4.10s and my speedo is accurate. Dont gen 2s go off the front abs sensors or something like that?

 

[NoLimit95]

97 and 98 both have a speedo gear because I put a 98 in the black 94 I had and had to swap out the speedo gears from the 94 trans, into the 98 but I always thought that the 99 Crown Vic had the long tail shaft and the Mark VIII has the short tail shaft and that's about where that gear would be connecting....

 

[chris2523]

so why did you go with a speedo gear anyway?? i have 4.10s and my speedo is accurate. Dont gen 2s go off the front abs sensors or something like that?

correct, the speedo on the gen 2 is not VSS related.
however, the VSS has other jobs too, like when to lower the air suspension, etc.

 

[slowmkviii]

Kirk said they also use it for the shift schedules.

 

[KStromberg]

Kirk said they also use it for the shift schedules.

I agree. Oh wait, duh.

 

[98LSC32V]

I agree. Oh wait, duh.

I have no problem with my shift schedule with out the speedo gear.

 

[KStromberg]

I have no problem with my shift schedule with out the speedo gear.

So how do you control the shift schedule then? Speedcal? I'm just curious because I've never heard that before.