np205 reseal, on vehicle! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

6768chevylover · 04-03-2019, 11:02 AM

I need to reseal the retainers for the front output and the rear output. Is it possible to do this with it on the truck if I was to move the cross member out of the way? also the rear retainer is the 8 bolt retainer not the small 5 bolt retainer. Is that doable on the truck or does it need to come out?

**kwmech** · 04-03-2019, 11:04 AM

Rear output 8 bolt retainer you'll have to be careful with removing the assembly as not to drop the needle bearings into the case. It can be done. I would question the input seal at this point if everything else is bad

6768chevylover · 04-03-2019, 11:50 AM

The sm465 is my transmission. Its full of oil everytime I check it so I'm sure the seal is prolly fine.

**jocko** · 04-03-2019, 06:37 PM

You've probably already seen this - and I realize your goal is to do this on the truck - but there are some great ref pics in this thread that may be helpful regardless of which route you take. http://67-72chevytrucks.com/vboard/s...d.php?t=469726

57taskforce · 04-05-2019, 11:06 AM

Quote:

Originally Posted by jocko

You've probably already seen this - and I realize your goal is to do this on the truck - but there are some great ref pics in this thread that may be helpful regardless of which route you take. http://67-72chevytrucks.com/vboard/s...d.php?t=469726

Mark is dead on here. This is a really good write up. I used it for reference when I did the bearings and seals in the 205 in my K20.

**special-K** · 04-05-2019, 10:08 AM

Mine needs it, too. I'll be dropping mine. I figure it's time to do the adapter and transmission, too. Mine's a TH350.

**jeffahart** · 04-05-2019, 11:44 AM

Quote:

Originally Posted by 6768chevylover

I need to reseal the retainers for the front output and the rear output. Is it possible to do this with it on the truck if I was to move the cross member out of the way? also the rear retainer is the 8 bolt retainer not the small 5 bolt retainer. Is that doable on the truck or does it need to come out?

Well, once the cross member is out the transfer is as good as out. Nothing in the way of dropping it. Keeping it in is no longer a shortcut. Biggest hassle is unbolting the front shaft, it's in a bad spot, but easy access if you remove the hump. If you are not sure about wrestling the 205 down I can give a couple tips. I do mine on the ground by myself.

j

6768chevylover · 04-15-2019, 02:26 PM

I bit the bullet and removed my T case from the truck and have been resealing it. My question is will 90w gl4 oil be fine for this?

**jeffahart** · 04-15-2019, 07:40 PM

Quote:

Originally Posted by 6768chevylover

I bit the bullet and removed my T case from the truck and have been resealing it. My question is will 90w gl4 oil be fine for this?

Yes use it for both. Gl4 it's better for the synchros in the transmission

J

**jeffahart** · 04-15-2019, 07:42 PM

Also make sure you use the gaskets no sealant when mounting the adapter to the T case and transmission. Those tolerances are very important

J

**jeffahart** · 04-15-2019, 07:47 PM

Another also. Some of the bolt holes on the PTO covers are through bolts. You might want to dab a little sealant on the threads. I think a couple bolts on the transmission side of the adapter are through bolts too. Just look at them all. I added a dab of thread sealant to a few of my bolts. I have no leaks, and I am happy.

J

6768chevylover · 04-15-2019, 04:07 PM

Sorry! for the refill of the tranny.

04-03-2019, 11:02 AM	#1
6768chevylover Registered User Join Date: May 2007 Location: nepa Posts: 745	np205 reseal, on vehicle! I need to reseal the retainers for the front output and the rear output. Is it possible to do this with it on the truck if I was to move the cross member out of the way? also the rear retainer is the 8 bolt retainer not the small 5 bolt retainer. Is that doable on the truck or does it need to come out?

04-03-2019, 11:04 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,592	Re: np205 reseal, on vehicle! Rear output 8 bolt retainer you'll have to be careful with removing the assembly as not to drop the needle bearings into the case. It can be done. I would question the input seal at this point if everything else is bad

04-03-2019, 11:50 AM	#3
6768chevylover Registered User Join Date: May 2007 Location: nepa Posts: 745	Re: np205 reseal, on vehicle! The sm465 is my transmission. Its full of oil everytime I check it so I'm sure the seal is prolly fine.

04-03-2019, 06:37 PM	#4
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,976	Re: np205 reseal, on vehicle! You've probably already seen this - and I realize your goal is to do this on the truck - but there are some great ref pics in this thread that may be helpful regardless of which route you take. http://67-72chevytrucks.com/vboard/s...d.php?t=469726

04-05-2019, 10:08 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: np205 reseal, on vehicle! Mine needs it, too. I'll be dropping mine. I figure it's time to do the adapter and transmission, too. Mine's a TH350. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

04-15-2019, 02:26 PM	#8
6768chevylover Registered User Join Date: May 2007 Location: nepa Posts: 745	Re: np205 reseal, on vehicle! I bit the bullet and removed my T case from the truck and have been resealing it. My question is will 90w gl4 oil be fine for this?

04-15-2019, 07:42 PM	#10
jeffahart Senior Member Join Date: May 2012 Location: Scottsdale, AZ Posts: 1,906	Re: np205 reseal, on vehicle! Also make sure you use the gaskets no sealant when mounting the adapter to the T case and transmission. Those tolerances are very important J __________________ White K20

04-15-2019, 07:47 PM	#11
jeffahart Senior Member Join Date: May 2012 Location: Scottsdale, AZ Posts: 1,906	Re: np205 reseal, on vehicle! Another also. Some of the bolt holes on the PTO covers are through bolts. You might want to dab a little sealant on the threads. I think a couple bolts on the transmission side of the adapter are through bolts too. Just look at them all. I added a dab of thread sealant to a few of my bolts. I have no leaks, and I am happy. J __________________ White K20

04-15-2019, 04:07 PM	#12
6768chevylover Registered User Join Date: May 2007 Location: nepa Posts: 745	Re: np205 reseal, on vehicle! Sorry! for the refill of the tranny.



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