Difference in NP241? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BlueMagicSS · 07-17-2010, 04:35 AM

I'm wondering if there is a difference between an NP241 mated to a 700R4 and an NP241 mated to a TH400. The tag on says NP241 C and both are passenger side drop. The listing says the case was pulled out of a 1990 Suburban 3/4 Ton with a TH400. I have an 89 K5 Blazer with a 700R4. Unfortunately I don't know the differences between transfer cases. Thanks in advance.

Davidmichael · 07-17-2010, 07:21 AM

To my knowledge there's really no big difference (?) I have a 700R4 backed by a NP241C.

Jonboy · 07-17-2010, 08:56 AM

The NP241 is very similar to the 208, but has a VSS instead of a Speedometer cable. There may be other differences, but that is the main one. 90-91 4wd trucks have an electronic cluster instead of a cable driven one.

1984 t type · 12-29-2010, 10:49 PM

from what i read the spline count on the 700r4 and 350 is 27 and on the 400 and manual trans is 32

Greenlee · 12-30-2010, 11:15 AM

Yes. The spline counts are different. I was looking for an np241 for my project last year and they are kind of hard to find. I think they only came in 89' to 91' Blazers and Suburbans.
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jkade · 01-03-2011, 10:52 AM

I put a np241 from a 91 burb behind my th400 and had to change the inputs. 27 on the 700r4 and 32 on the th400.

Walts_restoration · 01-03-2011, 10:59 AM

Also, the 1990-1991 np241 has a vss output rather than a mechanical speedo output like the 1989 np241 had, but other than that i believe the only difference is the 27 spline input for the 700r4 version and the 32 spline for the th400 or sm465 version (I believe)

Walts_restoration · 01-03-2011, 11:00 AM

oh ya, because your trucks an 89 the 90 t case would bolt in, you could swap to the vss style speedo, but if you put the 90 case in you'll lose the speedometer without changing anything else. Whats wrong with your current case?

07-17-2010, 04:35 AM	#1
BlueMagicSS Registered User Join Date: Jun 2010 Location: Bay Area, CA Posts: 40	Difference in NP241? I'm wondering if there is a difference between an NP241 mated to a 700R4 and an NP241 mated to a TH400. The tag on says NP241 C and both are passenger side drop. The listing says the case was pulled out of a 1990 Suburban 3/4 Ton with a TH400. I have an 89 K5 Blazer with a 700R4. Unfortunately I don't know the differences between transfer cases. Thanks in advance.

07-17-2010, 07:21 AM	#2
Davidmichael Registered User Join Date: Jun 2010 Location: Pittsburgh PA Posts: 686	Re: Difference in NP241? To my knowledge there's really no big difference (?) I have a 700R4 backed by a NP241C. __________________ 86 Suburban 2WD = rolled it and totaled it 83 LWB STD Cab 4x4 = went to the scrapper. Was my baby. 84 Suburban 2WD = stripped it/ scrapped it 81 8 foot bed made into a trailer 86 Suburban going to be made into a trailer 91 Suburban 4x4 = that's my baby 00 S10 Xtreme STD Cab 01 S10 ZR2

07-17-2010, 08:56 AM	#3
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: Difference in NP241? The NP241 is very similar to the 208, but has a VSS instead of a Speedometer cable. There may be other differences, but that is the main one. 90-91 4wd trucks have an electronic cluster instead of a cable driven one. __________________ 1974 Jimmy- 5.3/4L80e/NP241

12-29-2010, 10:49 PM	#4
1984 t type Registered User Join Date: Nov 2010 Location: MICHIGAN Posts: 196	Re: Difference in NP241? from what i read the spline count on the 700r4 and 350 is 27 and on the 400 and manual trans is 32 __________________ 1987 Buick Grand National 2018 Road Glide Special

12-30-2010, 11:15 AM	#5
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	Re: Difference in NP241? Yes. The spline counts are different. I was looking for an np241 for my project last year and they are kind of hard to find. I think they only came in 89' to 91' Blazers and Suburbans. Posted via Mobile Device

01-03-2011, 10:52 AM	#6
jkade Senior Member Join Date: Nov 2005 Location: AL Posts: 2,517	Re: Difference in NP241? I put a np241 from a 91 burb behind my th400 and had to change the inputs. 27 on the 700r4 and 32 on the th400.

01-03-2011, 10:59 AM	#7
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: Difference in NP241? Also, the 1990-1991 np241 has a vss output rather than a mechanical speedo output like the 1989 np241 had, but other than that i believe the only difference is the 27 spline input for the 700r4 version and the 32 spline for the th400 or sm465 version (I believe) __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

01-03-2011, 11:00 AM	#8
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: Difference in NP241? oh ya, because your trucks an 89 the 90 t case would bolt in, you could swap to the vss style speedo, but if you put the 90 case in you'll lose the speedometer without changing anything else. Whats wrong with your current case? __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums



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