Author Topic: NP241 passenger drop identification and wiring  (Read 3179 times)

Offline MuddiGGEr25

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NP241 passenger drop identification and wiring
« on: September 02, 2017, 09:04:03 AM »
I've had a real hard time coming up with much or any info on the np241 passenger side drop tcase. The gm literature says this burb has a 700r4 ( 27 spline) and np241. Its a 1991 v1500 with a 350 and 3.73 gear ratio.  I have attached a pic of the tail housing for the tcase and it appears to have a speed sensor which I can use for my 1995 tbi 454ss so it can have its normal input for shift points. Can anyone help me verify this? I don't have the DRAC module wiring, but from another post I had the diagram says the tcase speed sensor splits to the speedo and cruise control and the original signal is passed to the PCM or TCM. I don't have an electronic speedo or electronic cruise so I just need to know if I can fee that signal to my PCM
1988 V10 Suburban 5.7L TBI/TH350 39K on rebuild 4.10AR GM14FF/GM10SF 235/85R16 & 18.4-16.1

1988 V20 Suburban 6.2L-J/TH400 CA truck, 125K G80 14FF/ GM10 4.10AR GVWR 8,600

1977 Ford Granada ~450HP 302 2bbl/C4 27K original 2.47 215/70R14

Offline MuddiGGEr25

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Re: NP241 passenger drop identification and wiring
« Reply #1 on: September 02, 2017, 09:08:08 AM »
Here's the pic
1988 V10 Suburban 5.7L TBI/TH350 39K on rebuild 4.10AR GM14FF/GM10SF 235/85R16 & 18.4-16.1

1988 V20 Suburban 6.2L-J/TH400 CA truck, 125K G80 14FF/ GM10 4.10AR GVWR 8,600

1977 Ford Granada ~450HP 302 2bbl/C4 27K original 2.47 215/70R14

Offline Irish_Alley

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Re: NP241 passenger drop identification and wiring
« Reply #2 on: September 02, 2017, 08:24:58 PM »
i want to say yes, cant say for sure. But i can tell you they used the same sensors from 88-99. i dont see why not since 95 was the last year of the tbi and pretty much the same setup as 91
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline MuddiGGEr25

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Re: NP241 passenger drop identification and wiring
« Reply #3 on: September 03, 2017, 12:10:13 PM »
i want to say yes, cant say for sure. But i can tell you they used the same sensors from 88-99. i dont see why not since 95 was the last year of the tbi and pretty much the same setup as 91


well i got under there, and started disassembly (my God there is a ton of rust), anyway i looked up the speed sensor for a 1991 V1500 5.7L/700r4 suburban and the part no was the same for a 1995 K2500 7.4L/4l80E TBI setup, so the signal will be the same, i just have to find which of the 2  connectors i need to plug it into, as both of them had the same connector but i dont know which one goes where i needed it to, so ill have to scrape up those wiring diagrams again
1988 V10 Suburban 5.7L TBI/TH350 39K on rebuild 4.10AR GM14FF/GM10SF 235/85R16 & 18.4-16.1

1988 V20 Suburban 6.2L-J/TH400 CA truck, 125K G80 14FF/ GM10 4.10AR GVWR 8,600

1977 Ford Granada ~450HP 302 2bbl/C4 27K original 2.47 215/70R14

Offline Irish_Alley

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Re: NP241 passenger drop identification and wiring
« Reply #4 on: September 03, 2017, 03:11:04 PM »
might be able to tell by which wires are longer? or have a kink in from that bend?
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes