I have not, but I discussed it with Bigblock72 before I bought it. He owns the remapping software (he's going to do mine) and he said it would work fine.
CK5
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Finally... my 5.3 swap
- Thread starter MAX89K5
- Start date
y5mgisi
1 ton status
Just two quick things, what you could do is get the tail housing and speed sensor off a 90+ 241 cause they are electronic and send out proper signal. Then you would just have to swap to an electronic speedo out of 90-91 truck and you would be all good to go. Family common swap. The other thing to remember is no matter what, you have to install a switch to tell the computer when it's in low range. Otherwise, the computer will think the Trans is crazy slipping.
Here is the direct link to the various pulse generators from dakota digital.
http://www.dakotadigital.com/index....t_id=109/category_id=311/mode=prod/prd109.htm
When looking this up, I remembered that I called them as well. They were very cool on the phone and answered all of my questions.
For what it's worth, I am using an aftermarket electronic speedo that will run off of the output of the PCM not directly off of the output of the transmission. That may be the difference in what you are trying to do and what I am doing.
Hopefully one of these is what you are looking for because the price is great!
http://www.dakotadigital.com/index....t_id=109/category_id=311/mode=prod/prd109.htm
When looking this up, I remembered that I called them as well. They were very cool on the phone and answered all of my questions.
For what it's worth, I am using an aftermarket electronic speedo that will run off of the output of the PCM not directly off of the output of the transmission. That may be the difference in what you are trying to do and what I am doing.
Hopefully one of these is what you are looking for because the price is great!
Can you elaborate on the 4LO switch or where I can read about it? I have not read about this in my research.
y5mgisi
1 ton status
I forget where exactly i have seen it, but there is a pin that needs a swtiched ground to to tell the computer that its in 4lo. Just a sec.
y5mgisi
1 ton status
Here, pin 16 on the red connector (i assume its the same as the year your getting?).
http://lt1swap.com/99-02_vortec_pcm.htm
But yea, i have seen folks use a micro switch on the transfercase lever that the lever hits when its pulled into low. Yuo could also just use a random toggle switch and click it up when your in low.
http://lt1swap.com/99-02_vortec_pcm.htm
But yea, i have seen folks use a micro switch on the transfercase lever that the lever hits when its pulled into low. Yuo could also just use a random toggle switch and click it up when your in low.
So from what I've seen pin 16 on the red connector needs to see ground when in 4 low. I should be able to work that into my harness. I wonder if the 4x4 switch for the indicator light could be modified to work?
y5mgisi
1 ton status
Does it have a seperate light for low range? Cause you wouldnt want it "activated" in just 4hi.
vss issues
I see, good point sir. I got some more information from Brendan; There is not an inline VSS manufactured that will properly run the 4L60E, he said an incorrect or erratic VSS signal will lead to premature trans wear. So now I am considering a new adapter between the trans and t-case that incorporates a factory VSS. Any thoughts? Where can I get the least expensive adapter? Is it Teck that is running this setup?
I see, good point sir. I got some more information from Brendan; There is not an inline VSS manufactured that will properly run the 4L60E, he said an incorrect or erratic VSS signal will lead to premature trans wear. So now I am considering a new adapter between the trans and t-case that incorporates a factory VSS. Any thoughts? Where can I get the least expensive adapter? Is it Teck that is running this setup?
I see, good point sir. I got some more information from Brendan; There is not an inline VSS manufactured that will properly run the 4L60E, he said an incorrect or erratic VSS signal will lead to premature trans wear. So now I am considering a new adapter between the trans and t-case that incorporates a factory VSS. Any thoughts? Where can I get the least expensive adapter? Is it Teck that is running this setup?
I'm thinking your best bet would be to find to the tail shaft housing from a VSS equipped 241 from a 90-91 K5 or Burb like y5mgisi mentioned earlier. The only small issue there is that you would also need an electronic speedo from the same year/model truck. If you can't find what you need locally let me know. Last time I checked the yards near me there were a couple that had those trucks and I believe they wanted around $30 for the tail shaft and around $40 for the speedo or $46 for the whole cluster. I could grab them for you but I'm not sure what the shipping would be from Cali...
vss
I am lucky to see a single squarebody in the junk yards around here, a 90-91 blazer/burb is scarce as hen's teeth. What are ya'lls thoughts on drilling/tapping the 4l60e adapter and installing a vss?
like this : http://www.jagsthatrun.com/Pages/SpeedSensors_Reluctor.html
And someone please school me on what it takes to convert to electric speedo. Does the whole cluster have to be changed, or just the speedo? Is the printed circuit the same where the factory harness can simply plug in?
Thank you all for the help, much appreciated
I am lucky to see a single squarebody in the junk yards around here, a 90-91 blazer/burb is scarce as hen's teeth. What are ya'lls thoughts on drilling/tapping the 4l60e adapter and installing a vss?
like this : http://www.jagsthatrun.com/Pages/SpeedSensors_Reluctor.html
And someone please school me on what it takes to convert to electric speedo. Does the whole cluster have to be changed, or just the speedo? Is the printed circuit the same where the factory harness can simply plug in?
Thank you all for the help, much appreciated
Does anyone know if a np241 tailshaft housing from a 88-98 with vss will work with my 89 np241? I know the 88-98 case is driver side drop but i wonder if that is the only difference. An 88-98 would be MUCH easier to find here.
y5mgisi
1 ton status
Im not to sure if they will swap. But i would bet yes. As for the electric swap, probably best to do a little googling on that one.
I just found the write up on the conversion by a member. Sweet info
y5mgisi
1 ton status
Dont suppose you have the link? I will probably need that information when i do the swap on my 78 also! 
Here you are, props to "jeff in co" great write up!Dont suppose you have the link? I will probably need that information when i do the swap on my 78 also!
http://coloradok5.com/forums/showthread.php?t=296187
Alright here is my plan.
I am going to use a 88-98 sensor and a clamp on reluctor ring. The adapter between the trans and t case will be drilled to receive the OD of this :
The bung will be cut down to proper length and welded in. The sensor threads in and technically that will be the end.
My question to you all is : is there enough space on the trans shaft to use a clamp on reluctor when the t case is bolted up? Or does the output of the trans slide all the way into the t-case?
I am going to use a 88-98 sensor and a clamp on reluctor ring. The adapter between the trans and t case will be drilled to receive the OD of this :
The bung will be cut down to proper length and welded in. The sensor threads in and technically that will be the end.
My question to you all is : is there enough space on the trans shaft to use a clamp on reluctor when the t case is bolted up? Or does the output of the trans slide all the way into the t-case?
y5mgisi
1 ton status
I think there would be enough room.
Well for those wondering, a 88-98 drive drop NP241 VSS housing will NOT fit a passenger drop NP241. The indexing of the tabs on the oil pump are spaced differently and the pump cannot be clocked to accommodate this.
This gives you an idea
Couldn't hurt to try though, only spent $10 on the housing, sensor and reluctor. [emoji6]
This gives you an idea
Couldn't hurt to try though, only spent $10 on the housing, sensor and reluctor. [emoji6]
y5mgisi
1 ton status
Well good to know!
