Late Model Transmission Integration with Speedometer

[KevinVarnes]

I was just researching options for transmissions if I happened to go to a manual in the '97. One obstacle in going with a later model transmission is the incompatibility of the OSS with the factory speedometer. I know the Dallas Mustang Speedcal Extended Range and something from Ford Motorsports used to be options, but it looks like those have been out of production for many years. I was just curious if anyone was running a later model transmission and what they did to get the stock speedometer in the car to work properly.

 

[MadMikeyL]

I’m using this on my F150.

Dakota Digital SGI-100BT Dakota Digital Universal Speedometer and Tachometer Interfaces | Summit Racing

Free Shipping - Dakota Digital Universal Speedometer and Tachometer Interfaces with qualifying orders of $109. Shop Gauge Control Modules at Summit Racing.

www.summitracing.com

 

[Ericv8thunderbird]

I’m waiting on this to be back in stock, which I got an email alert it was back I stock, but they must have sold out quickly, cause when I went to order it was out of stock again.

https://lmr.com/item/AEI-ERA/abbot-mustang-electronic-speedometer-recalibrator-era-94-04

 

[KevinVarnes]

Good to know on both of those and they are somewhat readily available and they have the range to handle the OSS to VSS conversion. Mikey, I noticed in the Dakota description it says not for ABS systems. Is the ABS in your truck inactive then?

 

[XR7-4.6]

Good to know on both of those and they are somewhat readily available. Mikey, I noticed in the Dakota description it says not for ABS systems. Is the ABS in your truck inactive then?

It wouldn’t matter if you did or didn’t have ABS using it to convert the speedometer to read right, the output simulates the VSS signal not only to the speedometer, but the ABS, EEC, EVO and cruise.

Perhaps that disclaimer is to discourage usage in-line of the ABS wheel speed sensors? Otherwise it makes no sense

 

[MadMikeyL]

No, it doesn’t affect the ABS. You are modifying the signal coming out of the trans. I think what that means is you can’t use it to modify the wheel speed signals.

 

[KevinVarnes]

Okay, thanks for the clarification. I was wondering why they put that in there since I thought the ABS worked primarily off of the wheel speed sensors. The Abbot doesn't say anything about that.

 

[Grog6]

That type of signal translator would mess up abs; it's looking at "time to edge" of the on off switching, of the pulses, not the overall frequency.