40 pulse vss to 1986 XJ6 speedometer

[bstilwell]

I have 5.7 LT1 and 4L60e transmission. Larry s electric FI harness. There is a speedo drive wire from the ECU to drive the speedometer. Is there an adapter that will work with the jaguar speedometer? Or is there a GPS drive for this speedometer?

[JAY_COOLE]

3 options as i see it.

1. Dakota digital convertor. i used this in my '71 lump for a spell.
   ECD-200BT: Electronic Signal to Mechanical Cable Drive Adaptor
2. Send to Redline Gauge works to convert your stock speedo to VSS
   https://redlinegaugeworks.com/
3. Send to Redline Gaugeworks to convert to GPS
   https://redlinegaugeworks.com/

[BobPhx (Bob Brackney - 89 XJS V12, 5 sp/Marelli | 2013 XKR)]

GPS Speedo Solution

When I installed an older IRS center section, to get a 3:54 ratio in preparation for my five speed upgrade, I lost my speedometer as the older units have no provisions inside the diff for speedo sensing. I expected this, and I had a few different ideas on how I might regain speedo function. Swapping to an older transmission /electric driven speedo set up was the least attractive option. My first thought was to have the speedo head rebuilt to be GPS driven. After some research, I learned that …

[Cadjag (Carl Hutchins, Jr.)]

jaguar -Specialties has a module for insertion between the PCm and the speedo head. I never got around tyo doing that.

I erred and instaled a Dakota digital modue at the VSS wires. not uite good enogh. had i used it in the speedo wire at the PCM, it should have worked.

[rtloft (Bob Loftus)]

The Jaguar Specialties speedometer module is your best solution. It was specifically designed to convert the GM LT1 and LS PCM speedo signal to work with the Jaguar speedometers.

[Cadjag (Carl Hutchins, Jr.)]

Bob.

Absolutely right. I have on. Not in my car. In a can of speedom stuff. A project i never got around to. Now not like;y.

[rtloft (Bob Loftus)]

Hi Carl,
I hope you are doing well! Sorry for the long periods of inactivity. This post is typical of my reason for the lack of motivation to post. The original poster asked his question and received a number of good responses. But then never followed up or even offer a thank you to the guys who did. I admire your dedication!
Bob

[Cadjag (Carl Hutchins, Jr.)]

Thanks, Bob. so many folks helped me in my prpject,icluding you. The S57 Schematic that you shared was so useful.

For my advanced years, i am doing OK. My projects are fewer and of greater simplicxity and needing a lot less muscle. Fixing solar powered yard lights as of now. i made posts from tree branches for a natural look. One is a marer for backing my jeep in to just the right spot in my drive.

And playong on my ancient computrrs. One wrestle was to reestablish connectivity wth my epson workfrce printer. never figured out what happened. But, a new USB cable plus a reinstall of the drvers and it works!!! driver issue, cable issue or both!!!

Oh well.

fixed.Victory is sweet.

Carl