NP205 to 4L80e - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mcmlxix · 08-21-2011, 07:41 PM

OK... so I have this NP205 that is supposed to be from a 1991 crewcab truck that had the 4L80e... Has 32 spline input and has the VSS connector on the output shaft... How does it mate to the 4L80e? Does it need a spacer? There are threaded holes on the transfer case, and the pics of the 4L80e i find also have threded holes... I think I'm missing something....

Also, there is another sensor on the top of the case over one of the shift rails. Was this for a dash light to show 4WD Engaged?

Here is the case...

SWB4x4 · 08-22-2011, 06:58 PM

You are missing the "Very Rare" transfer case to transmission adaptor. hope u didnt pay too much without it they can be hard to find and pricey.

SWB4x4 · 08-23-2011, 03:25 PM

saw this on another forum might be the answer and ALOT cheaper!

http://www.pirate4x4.com/forum/showthread.php?t=950363

6T8 · 08-23-2011, 04:36 PM

swb4x4 His tc is not a figure 8. Junk yard best bet. I bet they are expensive though..Rick

SWB4x4 · 08-23-2011, 05:11 PM

Quote:

Originally Posted by 6T8

swb4x4 His tc is not a figure 8. Junk yard best bet. I bet they are expensive though..Rick

I know that the link I posted adapts whichever transmission to whichever transfercase you have.... They are custom made to order interchangeble ends before final assembly.

SWB4x4 · 08-23-2011, 06:34 PM

and the plug is the V.S.S I believe

Redcap · 08-23-2011, 08:52 PM

Quote:

Originally Posted by SWB4x4

I know that the link I posted adapts whichever transmission to whichever transfercase you have.... They are custom made to order interchangeble ends before final assembly.

I've dealt with TTF before. They make great products.

*mrdana60* · 08-23-2011, 09:25 PM

i know a guy that has a 4l80e with a 205. that is in a crew cab. but hes in georgia.

mcmlxix · 08-24-2011, 12:28 AM

Quote:

Originally Posted by SWB4x4

saw this on another forum might be the answer and ALOT cheaper!

http://www.pirate4x4.com/forum/showthread.php?t=950363

Thanks... I found that thread yesterday... and I see you were on ColoradoK5 as well... I got some info from that thread as well...

Most of the info I got from Pirate4x4, and I have been updating there... I dont have a trans yet, I just got the NP205 because I knew it has the 32 spline shaft.. I now know there is a long and short input for the 205.... and there are 3-4 4L80e output shafts...

I guess alot if this depends on the 4L80e I end up with... 2WD vs 4WD .. and the output shaft itself... Since finding a factory adapter is like finding the Holy Grail.... I will probably end up with this setup, from TTF, as its custom configurable (based on the 4l80e output) and infinitly clockable....

** I know the pic shows the Figure 8 pattern, but they have the round pattern as well

SWB4x4 · 08-24-2011, 01:18 AM

Quote:

Originally Posted by mcmlxix

Thanks... I found that thread yesterday... and I see you were on ColoradoK5 as well... I got some info from that thread as well...

Most of the info I got from Pirate4x4, and I have been updating there... I dont have a trans yet, I just got the NP205 because I knew it has the 32 spline shaft.. I now know there is a long and short input for the 205.... and there are 3-4 4L80e output shafts...

I guess alot if this depends on the 4L80e I end up with... 2WD vs 4WD .. and the output shaft itself... Since finding a factory adapter is like finding the Holy Grail.... I will probably end up with this setup, from TTF, as its custom configurable (based on the 4l80e output) and infinitly clockable....

** I know the pic shows the Figure 8 pattern, but they have the round pattern as well

Ive got a lead on a factory round adaptor I'll hafta see if its the one you need....

btw I have access to the pics(full member) on CK5 for a couple more days if u need me to look up anything for ya there

mcmlxix · 08-24-2011, 01:55 AM

Quote:

Originally Posted by SWB4x4

Ive got a lead on a factory round adaptor I'll hafta see if its the one you need....

btw I have access to the pics(full member) on CK5 for a couple more days if u need me to look up anything for ya there

Thanks J.T. - I think I got what I need... I'm glad I found some pics of the factory part for reference... they were linked and not hosted by CK5...

You can get a TH400/NP241 adaper on eBay for about $100 or less. Im going to check the local pick-n-pull yard on Thursday. The guy I got the xfer case from said he should have a TH400/NP241 but has to check his stash...

Since I want to move my xfer shifter to a custom console, I couldn't use the stock lever in the stock location. It would be a waste of a hard to find part. Plus, if I cant find a cheap 4wd version of the 4L80e, I may need the custom adapter for the loner 2wd output shaft... I would rather not have the added cost of changing output shafts on the transmission...

I have a friend that can MIG/TIG with results that resemble a robot, so the TTF is a good match for my variables...

PS: Here is a pic of the factoy 1991 4L80e to NP205 (round) adatper with the shifter boss. Next to it (media blasted) is the output housing with the VSS mounting hole... (thery were posted by Northwest Fab on 3/13/2006 on the CK5 board)

Mr. 250r · 12-09-2011, 06:26 PM

Not sure of it helps anyone but I can possibly get newer style round pattern adapters if anyone is interested

08-21-2011, 07:41 PM	#1
mcmlxix Collector of Projects Join Date: Apr 2003 Location: Las Vegas Posts: 3,106	NP205 to 4L80e OK... so I have this NP205 that is supposed to be from a 1991 crewcab truck that had the 4L80e... Has 32 spline input and has the VSS connector on the output shaft... How does it mate to the 4L80e? Does it need a spacer? There are threaded holes on the transfer case, and the pics of the 4L80e i find also have threded holes... I think I'm missing something.... Also, there is another sensor on the top of the case over one of the shift rails. Was this for a dash light to show 4WD Engaged? Here is the case... __________________ Rich 1972 K5 Blazer CST Click HERE D60 BIG BRAKE UPGRADE Click HERE

08-22-2011, 06:58 PM	#2
SWB4x4 Registered User Join Date: Jan 2010 Location: Nor*Cal CALIFORNIA Posts: 157	Re: NP205 to 4L80e You are missing the "Very Rare" transfer case to transmission adaptor. hope u didnt pay too much without it they can be hard to find and pricey. __________________ J.T. 1972 SWB 4X4 on 35"s with 6" lift all around 3/4 ton running gear with high steer and 4.88s 350/th350. SOON TO BE DONE:2" higher in front 37"s,LSX Swap,Hugger Orange & White Paint Scheme,Air Conditioning,Power Windows & Locks,Complete Gauge Kit,Tank Relocation,Double Din Nav with full Audio System. My Build Thread http://67-72chevytrucks.com/vboard/s...=1#post4169140

08-23-2011, 03:25 PM	#3
SWB4x4 Registered User Join Date: Jan 2010 Location: Nor*Cal CALIFORNIA Posts: 157	Re: NP205 to 4L80e saw this on another forum might be the answer and ALOT cheaper! http://www.pirate4x4.com/forum/showthread.php?t=950363 __________________ J.T. 1972 SWB 4X4 on 35"s with 6" lift all around 3/4 ton running gear with high steer and 4.88s 350/th350. SOON TO BE DONE:2" higher in front 37"s,LSX Swap,Hugger Orange & White Paint Scheme,Air Conditioning,Power Windows & Locks,Complete Gauge Kit,Tank Relocation,Double Din Nav with full Audio System. My Build Thread http://67-72chevytrucks.com/vboard/s...=1#post4169140

08-23-2011, 04:36 PM	#4
6T8 Active Member Join Date: Dec 2004 Location: Tucson, AZ Posts: 233	Re: NP205 to 4L80e swb4x4 His tc is not a figure 8. Junk yard best bet. I bet they are expensive though..Rick

08-23-2011, 06:34 PM	#6
SWB4x4 Registered User Join Date: Jan 2010 Location: Nor*Cal CALIFORNIA Posts: 157	Re: NP205 to 4L80e and the plug is the V.S.S I believe __________________ J.T. 1972 SWB 4X4 on 35"s with 6" lift all around 3/4 ton running gear with high steer and 4.88s 350/th350. SOON TO BE DONE:2" higher in front 37"s,LSX Swap,Hugger Orange & White Paint Scheme,Air Conditioning,Power Windows & Locks,Complete Gauge Kit,Tank Relocation,Double Din Nav with full Audio System. My Build Thread http://67-72chevytrucks.com/vboard/s...=1#post4169140

08-23-2011, 09:25 PM	#8
mrdana60 Account Suspended Join Date: Sep 2010 Location: centre al Posts: 2,471	Re: NP205 to 4L80e i know a guy that has a 4l80e with a 205. that is in a crew cab. but hes in georgia.

12-09-2011, 06:26 PM	#12
Mr. 250r Registered User Join Date: Dec 2010 Location: freeburg, illinois Posts: 885	Re: NP205 to 4L80e Not sure of it helps anyone but I can possibly get newer style round pattern adapters if anyone is interested __________________ 1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB Last edited by Mr. 250r; 12-09-2011 at 06:33 PM.



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