NP241c Passenger vs Driver drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LowLifeS10 · 01-06-2017, 11:19 AM

Hey, Im LS swapping my truck (5.3/4L80e/np241) so I need VSS. But I have the mechanical speedo 241 and I need to convert it to VSS. Im having a hard time finding passenger drop 241 parts here in Sweden, plenty of driver drops tho.

So my question is, Will the driver drop speedometer housing fit on the passenger 241 or are the parts different?

b454rat · 01-06-2017, 02:46 PM

I wanna say the parts will swap over, but personally never tried, but, have read that they will.

**kwmech** · 01-06-2017, 04:27 PM

The rear housing will be indexed differently, I believe. Let me see what I've got laying around

LowLifeS10 · 01-06-2017, 06:20 PM

b454rat: I've been googling like crazy to find anything about it, I think i've read it somewhere but I want to be sure before I buy extra parts.

kwmech: It would be sweet if you had the parts to compare

LowLifeS10 · 01-17-2017, 05:09 PM

Anyone else that know something?

**First c10** · 01-17-2017, 07:18 PM

This is an old picture I found.
The bottom left one is what you need I think.
I will see if I can find a shaft picture

https://cobratransmission.com/index....ort=20a&page=3 try this link

(Picture caption)The two bottom housings are from NP241s. The housing on the bottom left is a standard GM version with a magnetic pickup for the speedometer; the other is a custom JB Conversions housing that fits a fixed-yoke kit onto an NP241. The housing at the upper left is used with the JB short-shaft kit for NP231 cases; the one on the upper right is a standard TJ housing.

LowLifeS10 · 01-19-2017, 04:05 PM

Quote:

Originally Posted by First c10

This is an old picture I found.
The bottom left one is what you need I think.
I will see if I can find a shaft picture

https://cobratransmission.com/index....ort=20a&page=3 try this link

(Picture caption)The two bottom housings are from NP241s. The housing on the bottom left is a standard GM version with a magnetic pickup for the speedometer; the other is a custom JB Conversions housing that fits a fixed-yoke kit onto an NP241. The housing at the upper left is used with the JB short-shaft kit for NP231 cases; the one on the upper right is a standard TJ housing.

Thanks for the link, they dont specify if it only fits pass or driver drop so I guess they'll fit both

**First c10** · 01-19-2017, 06:02 PM

No problem. I think it is indexing. Good luck.

Bigdav160 · 01-19-2017, 07:42 PM

The speed sensor needs to be perpendicular to the centerline of the output shaft.

01-06-2017, 11:19 AM	#1
LowLifeS10 Registered User Join Date: Jul 2011 Location: Sweden Posts: 165	NP241c Passenger vs Driver drop Hey, Im LS swapping my truck (5.3/4L80e/np241) so I need VSS. But I have the mechanical speedo 241 and I need to convert it to VSS. Im having a hard time finding passenger drop 241 parts here in Sweden, plenty of driver drops tho. So my question is, Will the driver drop speedometer housing fit on the passenger 241 or are the parts different? __________________ GMC C15 -68 project: http://67-72chevytrucks.com/vboard/s...d.php?t=526059 Front/back Porterbuilt dropmember, Accuair, LS1/4L60e Chevrolet C20 -72 C20 to K10/20 conversion, LS power.

01-06-2017, 02:46 PM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,453	Re: NP241c Passenger vs Driver drop I wanna say the parts will swap over, but personally never tried, but, have read that they will. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS

01-06-2017, 04:27 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,382	Re: NP241c Passenger vs Driver drop The rear housing will be indexed differently, I believe. Let me see what I've got laying around

01-06-2017, 06:20 PM	#4
LowLifeS10 Registered User Join Date: Jul 2011 Location: Sweden Posts: 165	Re: NP241c Passenger vs Driver drop b454rat: I've been googling like crazy to find anything about it, I think i've read it somewhere but I want to be sure before I buy extra parts. kwmech: It would be sweet if you had the parts to compare __________________ GMC C15 -68 project: http://67-72chevytrucks.com/vboard/s...d.php?t=526059 Front/back Porterbuilt dropmember, Accuair, LS1/4L60e Chevrolet C20 -72 C20 to K10/20 conversion, LS power.

01-17-2017, 05:09 PM	#5
LowLifeS10 Registered User Join Date: Jul 2011 Location: Sweden Posts: 165	Re: NP241c Passenger vs Driver drop Anyone else that know something? __________________ GMC C15 -68 project: http://67-72chevytrucks.com/vboard/s...d.php?t=526059 Front/back Porterbuilt dropmember, Accuair, LS1/4L60e Chevrolet C20 -72 C20 to K10/20 conversion, LS power.

01-17-2017, 07:18 PM	#6
First c10 Senior Member Join Date: Dec 2012 Location: Los Banos CA Posts: 2,705	Re: NP241c Passenger vs Driver drop This is an old picture I found. The bottom left one is what you need I think. I will see if I can find a shaft picture https://cobratransmission.com/index....ort=20a&page=3 try this link (Picture caption)The two bottom housings are from NP241s. The housing on the bottom left is a standard GM version with a magnetic pickup for the speedometer; the other is a custom JB Conversions housing that fits a fixed-yoke kit onto an NP241. The housing at the upper left is used with the JB short-shaft kit for NP231 cases; the one on the upper right is a standard TJ housing. Attached Images __________________ 1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR SOLD GO GO!!!

01-19-2017, 06:02 PM	#8
First c10 Senior Member Join Date: Dec 2012 Location: Los Banos CA Posts: 2,705	Re: NP241c Passenger vs Driver drop No problem. I think it is indexing. Good luck. __________________ 1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR SOLD GO GO!!!

01-19-2017, 07:42 PM	#9
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: NP241c Passenger vs Driver drop The speed sensor needs to be perpendicular to the centerline of the output shaft. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

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