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91 xj speedo

SteveJenkins

SteveJenkins

Well-known member
Joined
Feb 23, 2023
Member Number
6214
Messages
54
A6D1BE55-FBC6-4979-BC82-B3105EF9EFED.jpeg

My MMW box arrived!!!

They sent me their new output without speedo provisions. I’m not complaining. I’m super stoked this thing arrived!

What are my Speedo options to keep my cel off. 91xj
 
not sure about 91 but I reckons your AW-4 have output speed sensor. I’d try look into tapping that for your speedometer.

2C84D796-53D9-4D7B-8E84-E322899229F4.jpeg


And have it run through Dakota Digital speedometer converter.
www.summitracing.com

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 Sending Units at Summit Racing.
www.summitracing.com www.summitracing.com

The downfall your speedometer will go wild when in low range. :laughing:

I have this in my 97 Ram 2500 with the NP271 swapped in. The 271 have no provision for VSS. I tapped into rear axle’s abs sensor. Work great.
 
Does your transmission have a gear or is it electric? If it is gear driven I doubt you’ll have a check engine light mostly because mine was messed up for a few days until I realized I needed a bolt tightened.
 
RunningProblem said:
Does your transmission have a gear or is it electric? If it is gear driven I doubt you’ll have a check engine light mostly because mine was messed up for a few days until I realized I needed a bolt tightened.
Click to expand...
My speedo sensor is on my np231 output housing.
 
TrailTamer said:
not sure about 91 but I reckons your AW-4 have output speed sensor. I’d try look into tapping that for your speedometer.

2C84D796-53D9-4D7B-8E84-E322899229F4.jpeg


And have it run through Dakota Digital speedometer converter.
www.summitracing.com

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 Sending Units at Summit Racing.
www.summitracing.com www.summitracing.com

The downfall your speedometer will go wild when in low range. :laughing:

I have this in my 97 Ram 2500 with the NP271 swapped in. The 271 have no provision for VSS. I tapped into rear axle’s abs sensor. Work great.
Click to expand...
Yeah. I just looked and there is a sensor in that location on my transmission. I wonder why there one on both trans and t case.
 
You paid big bucks for a new case and they didn’t give you a VSS option? Fuck that.

Anything else is going to be a royal pain and your jeep will probably stall out when you come to a stop. Cherokees rely on that VSS on the tail of transfer cases.
 
SteveJenkins said:
Yeah. I just looked and there is a sensor in that location on my transmission. I wonder why there one on both trans and t case.
Click to expand...
Tell me about it.

Allegedly the one on trans is for trans’ operation, and the one on t-case is for speedometer.

My truck (47RE) have output shaft speed sensor too.

I found out the hard way right after I got my Dakota digital installed (not configured or calibrated correctly) that for some reason the trans priorized VSS over its own output speed sensor.

As soon as I start moving in my driveway, my speedometer fully pegged and the trans upshifted through all 4 gears and to top it off the TCC locked. :eek:
I almost drove into my neighbor’s yard across the road before it finally stalled.
 
SteveJenkins said:
My speedo sensor is on my np231 output housing.
Click to expand...
So mechanical? You won’t have a CEL.

Just email MM and ask them for a new output. I’m sure they can make it in 37 weeks or more. With how much you paid I’d be asking for it to be custom made since it’s what you need and ordered.
 
RunningProblem said:
So mechanical? You won’t have a CEL.

Just email MM and ask them for a new output. I’m sure they can make it in 37 weeks or more. With how much you paid I’d be asking for it to be custom made since it’s what you need and ordered.
Click to expand...
I’ll probably just email them and see if they’ll send out the jb conversions rear output that I ordered.
 
TrailTamer said:
Tell me about it.

Allegedly the one on trans is for trans’ operation, and the one on t-case is for speedometer.

My truck (47RE) have output shaft speed sensor too.

I found out the hard way right after I got my Dakota digital installed (not configured or calibrated correctly) that for some reason the trans priorized VSS over its own output speed sensor.

As soon as I start moving in my driveway, my speedometer fully pegged and the trans upshifted through all 4 gears and to top it off the TCC locked. :eek:
I almost drove into my neighbor’s yard across the road before it finally stalled.
Click to expand...
Less fancy circuitry the better :vader2:
 
I have 2 vehicles that I am running the transmission speed signals through a DD box to feed the speedometer. It works fine and I have been running them that way for several years now.
 
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That outer bearing was pressed on. 🤬
The inner popped right loose with a brap of the air spike and a crow foot under the inner race.
 
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