NP 205 Rebuild and Info - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

obijuan · 06-11-2013, 06:50 PM

The 205 is one of the easiest things ive ever done on an r&r. I have done, nearing 15 of em id say, for people afraid of em. Its just parts. Same thing with a th400. Take it apart. See whats inside. Youd be amazed at the simplicity.
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jbclassix · 06-11-2013, 06:57 PM

Quote:

Originally Posted by jaros44sr

Is there any info. on the seals and how they are installed for the adapter that bolts to the trans? Seems this is where mine is leaking

Help?

Thanks for taking the time jbclassix

On this one that I built there is an o-ring on the input shaft of the t-case that seals to the inside of the adapter sleeve, and there is a plain encased seal in the adapter housing that seals to the outside of the adapter sleeve. I am going to finish rebuilding the t-case soon.

Quote:

Originally Posted by jjzepplin

There are also two regular type seals that are in the adapter for the coupler outer seals. The inner is the o ring. This keeps fluid from your trans from going into your t-case.

**jaros44sr** · 06-11-2013, 11:41 PM

Sounds good guys, thanks for the help

jbclassix · 06-26-2013, 12:57 AM

Wow. 2 years later...

Tips for the Yokes. I sleeved both. I use green lock-tite on them to prevent seepage between the parts. i apply RTV sealant to the inside of the yokes, and not the shaft. This way you will not be pushing RTV into the case.
10 spline front yoke repair sleeve part number (federal mogul 99174)
32 spline rear yoke repair sleeve part number (federal mogul 99212)

Spline washer seal. important piece. Only works on the 32 spline yokes in my opinion.

Torque for the rear yoke is 150lbft.

repeat steps for the front yoke. The front has a dust shield.

I will show pictures of the early style adapter for reference.

FRENCHBLUE72 · 07-04-2013, 07:32 PM

Do you happen to have any pics of the adapter seals? Mine is the o ring style on the trans to adaptor and idea on the case to adaptor seal? My trans was leaking atf into the t case so here I am..

jjzepplin · 07-04-2013, 08:27 PM

Auto Zone had mine in stock. They look just like wheel seals and the coupler just sits centered on them. They seal the outer part of the coupler while the inner is sealed by the "o" ring. Case to adapter gasket can be bought on ebay for a couple bucks.

obijuan · 07-04-2013, 09:12 PM

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obijuan · 07-04-2013, 09:13 PM

Those are the three seals you will need. Small oring is for the inside of the coupler. Big oring is for the trans to adapter. Regular lipped seal is outside of coupler.
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FRENCHBLUE72 · 07-04-2013, 10:29 PM

I found all the seals with the exception of the small o Ring seal to the shaft
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obijuan · 07-04-2013, 10:56 PM

Comes in my gm 205 gasket kits.
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jbclassix · 07-06-2013, 01:07 AM

I have 2 lip seals in my adapter. The larger one obijuan doesnt have pictured i cannot find a PN for. For autos i recommend putting some silicone on the inside of the coupler like i did the yokes.
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jbclassix · 07-09-2013, 07:28 PM

Here is what I have for seals.

there are 2 lip seals inside the 1st gen adapter.

here are the 2 lip seals.

transmission side

transfer side

here you can see where the 2 lip seals ride on the coupler

here you can see the sealing surface the o-ring on the t-case input shaft seals against. Make sure this side of the coupler is on the t-case side. Also, clean the splines on the coupler, and put some silicone on it. This will act as a back-up to the o-ring.

**jaros44sr** · 07-16-2013, 06:35 PM

Thanks for the added information, should come in handy....

jbclassix · 07-20-2013, 11:43 PM

Bad image of 32 spline front output shaft

79Betty · 07-21-2013, 04:31 PM

Jbclassix. One helluva write up. When i tore mine apart it didn't have the spacer on the rear output. Now that i out it together the input from the tranny shaft slides back and forth. I've got it all torqued down but don't wantto put it in because when slid out it grinds horribly. When in farther it spins smooth as silk. Any ideas?
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jbclassix · 07-21-2013, 04:54 PM

Quote:

Originally Posted by 79Betty

Jbclassix. One helluva write up. When i tore mine apart it didn't have the spacer on the rear output. Now that i out it together the input from the tranny shaft slides back and forth. I've got it all torqued down but don't wantto put it in because when slid out it grinds horribly. When in farther it spins smooth as silk. Any ideas?
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are you talking about the input shaft in the t-case or the coupler? If it is the input shaft for the t-case, the outer snap ring on the input bearing prevents the input from going back into the case, and the transmission-to-transfer-case adapter prevents the input from sliding forward, out of the case.

79Betty · 07-21-2013, 04:59 PM

Yes the input from tranny. So the "slop" iis supposed to be there?
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jbclassix · 07-21-2013, 09:13 PM

Quote:

Originally Posted by 79Betty

Yes the input from tranny. So the "slop" iis supposed to be there?
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Yes. It is. On the spacer on the rear output, was your shoulder longer? Your speedo gear will be loose if it is supposed to have a spacer and doesn't.
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79Betty · 07-21-2013, 09:19 PM

I noteced it would move back on the sleeve. Could i just use a thick washer as a spacer?
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jbclassix · 07-21-2013, 10:01 PM

You will actually need that spacer. The yoke, spacer, and gear keep the output shaft riding on the bearings where they are supposed to. but let me triple check that. I have an output assembly I need to rip into anyway.

jbclassix · 07-30-2013, 12:19 AM

Newer case with a staked idler shaft on the rear side to prevent rotation.

'63GENIII · 08-21-2013, 01:54 AM

Killer write up Jeremy! Thanks for the read. After reading this thread, I was able to completely disassemble, clean and reseal the divorced dodge 205 that is replacing the old T221 in my '63. It came out great.

61K10 · 08-21-2013, 11:20 AM

63GENIII--does the dodge use the same mounting as the 221?

'63GENIII · 08-22-2013, 03:03 AM

Quote:

Originally Posted by 61K10

63GENIII--does the dodge use the same mounting as the 221?

Sent a PM. Didn't want to hijack but yes it fits
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gmjim4x4 · 09-05-2013, 08:33 AM

Quote:

Originally Posted by jbclassix

Wow. 2 years later...

Tips for the Yokes. I sleeved both. I use green lock-tite on them to prevent seepage between the parts. i apply RTV sealant to the inside of the yokes, and not the shaft. This way you will not be pushing RTV into the case.
10 spline front yoke repair sleeve part number (federal mogul 99174)
32 spline rear yoke repair sleeve part number (federal mogul 99212)

Spline washer seal. important piece. Only works on the 32 spline yokes in my opinion.

Torque for the rear yoke is 150lbft.

repeat steps for the front yoke. The front has a dust shield.

I will show pictures of the early style adapter for reference.

Do you have a part number for the larger seal needed for the front output after you put the speedy sleeve on ? I have the 30 spline output shaft and yoke, but I am guessing that the outside diameter is the same as your 10 spline ? How long should I let the silicone sit on the inside of the yoke before I put it on the shaft? Nice write up and very helpful. Thanks

06-11-2013, 06:50 PM	#51
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: NP 205 Rebuild and Info The 205 is one of the easiest things ive ever done on an r&r. I have done, nearing 15 of em id say, for people afraid of em. Its just parts. Same thing with a th400. Take it apart. See whats inside. Youd be amazed at the simplicity. Posted via Mobile Device

06-11-2013, 11:41 PM	#53
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,766	Re: NP 205 Rebuild and Info Sounds good guys, thanks for the help __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

06-26-2013, 12:57 AM	#54
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info Wow. 2 years later... Tips for the Yokes. I sleeved both. I use green lock-tite on them to prevent seepage between the parts. i apply RTV sealant to the inside of the yokes, and not the shaft. This way you will not be pushing RTV into the case. 10 spline front yoke repair sleeve part number (federal mogul 99174) 32 spline rear yoke repair sleeve part number (federal mogul 99212) Spline washer seal. important piece. Only works on the 32 spline yokes in my opinion. Torque for the rear yoke is 150lbft. repeat steps for the front yoke. The front has a dust shield. I will show pictures of the early style adapter for reference. __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205 Last edited by jbclassix; 07-01-2013 at 09:08 PM.

07-04-2013, 07:32 PM	#55
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: NP 205 Rebuild and Info Do you happen to have any pics of the adapter seals? Mine is the o ring style on the trans to adaptor and idea on the case to adaptor seal? My trans was leaking atf into the t case so here I am.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

07-04-2013, 08:27 PM	#56
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,567	Re: NP 205 Rebuild and Info Auto Zone had mine in stock. They look just like wheel seals and the coupler just sits centered on them. They seal the outer part of the coupler while the inner is sealed by the "o" ring. Case to adapter gasket can be bought on ebay for a couple bucks. __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

07-04-2013, 09:12 PM	#57
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: NP 205 Rebuild and Info Posted via Mobile Device

07-04-2013, 09:13 PM	#58
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: NP 205 Rebuild and Info Those are the three seals you will need. Small oring is for the inside of the coupler. Big oring is for the trans to adapter. Regular lipped seal is outside of coupler. Posted via Mobile Device

07-04-2013, 10:29 PM	#59
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	Re: NP 205 Rebuild and Info I found all the seals with the exception of the small o Ring seal to the shaft Posted via Mobile Device __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

07-04-2013, 10:56 PM	#60
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	Re: NP 205 Rebuild and Info Comes in my gm 205 gasket kits. Posted via Mobile Device

07-06-2013, 01:07 AM	#61
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info I have 2 lip seals in my adapter. The larger one obijuan doesnt have pictured i cannot find a PN for. For autos i recommend putting some silicone on the inside of the coupler like i did the yokes. Posted via Mobile Device __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

07-09-2013, 07:28 PM	#62
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info Here is what I have for seals. there are 2 lip seals inside the 1st gen adapter. here are the 2 lip seals. transmission side transfer side here you can see where the 2 lip seals ride on the coupler here you can see the sealing surface the o-ring on the t-case input shaft seals against. Make sure this side of the coupler is on the t-case side. Also, clean the splines on the coupler, and put some silicone on it. This will act as a back-up to the o-ring. __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

07-16-2013, 06:35 PM	#63
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,766	Re: NP 205 Rebuild and Info Thanks for the added information, should come in handy.... __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

07-20-2013, 11:43 PM	#64
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info Bad image of 32 spline front output shaft __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

07-21-2013, 04:31 PM	#65
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: NP 205 Rebuild and Info Jbclassix. One helluva write up. When i tore mine apart it didn't have the spacer on the rear output. Now that i out it together the input from the tranny shaft slides back and forth. I've got it all torqued down but don't wantto put it in because when slid out it grinds horribly. When in farther it spins smooth as silk. Any ideas? Posted via Mobile Device __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10

07-21-2013, 04:59 PM	#67
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: NP 205 Rebuild and Info Yes the input from tranny. So the "slop" iis supposed to be there? Posted via Mobile Device __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10



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07-21-2013, 09:19 PM	#69
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: NP 205 Rebuild and Info I noteced it would move back on the sleeve. Could i just use a thick washer as a spacer? Posted via Mobile Device __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10

07-21-2013, 10:01 PM	#70
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info You will actually need that spacer. The yoke, spacer, and gear keep the output shaft riding on the bearings where they are supposed to. but let me triple check that. I have an output assembly I need to rip into anyway. __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

07-30-2013, 12:19 AM	#71
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP 205 Rebuild and Info Newer case with a staked idler shaft on the rear side to prevent rotation. __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

08-21-2013, 01:54 AM	#72
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: NP 205 Rebuild and Info Killer write up Jeremy! Thanks for the read. After reading this thread, I was able to completely disassemble, clean and reseal the divorced dodge 205 that is replacing the old T221 in my '63. It came out great. __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

08-21-2013, 11:20 AM	#73
61K10 Registered User Join Date: Feb 2012 Location: pleasant valley--placerville ca Posts: 3,039	Re: NP 205 Rebuild and Info 63GENIII--does the dodge use the same mounting as the 221? __________________ 1961 chevy K10 my build is------------61K10 build

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