NP205 Speedo delete - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Becabaum · 03-05-2024, 08:03 PM

I have a 72 Blazer that I recently had a LS swap performed on. I have a leak on the NP205 that I believe is coming from the speedo. I have attached photos. My question is what can I do to solve this. Can I cap it? If so, what size and thread is it? (I have searched and cant seem to find it). Should I remove it altogether and plug it?
Thanks in advance

**DeadheadNM** · 03-05-2024, 08:52 PM

Replace the seal in the adapter. See here: https://www.motorcityk5.com/i-13102-...=category:9415

This is designed to work w a speedo cable of course so may not be the cure. Other guys might have an idea about a possible cap.

**Richard** · 03-06-2024, 03:33 AM

Replacing the seal in the cable connection may do nothing if the cable is not attached. ORD sells caps. I purchased one as I no longer need the cable speedometer wih my LS swap. Cannot remember which one I purchased for my 72?
https://www.offroaddesign.com/np205-...20-thread.html
https://www.offroaddesign.com/np205-...20-thread.html
Maybe I can check my past purchases?
Sorry. past purchases are gone on my account, maybe call ORD and see which one they recommend?

hemi43 · 03-08-2024, 10:43 AM

Quote:

Originally Posted by Richard

Replacing the seal in the cable connection may do nothing if the cable is not attached. ORD sells caps. I purchased one as I no longer need the cable speedometer wih my LS swap. Cannot remember which one I purchased for my 72?
https://www.offroaddesign.com/np205-...20-thread.html
https://www.offroaddesign.com/np205-...20-thread.html
Maybe I can check my past purchases?
Sorry. past purchases are gone on my account, maybe call ORD and see which one they recommend?

Wow, $40 for one!!! Maybe I should start producing these.

**Accelo** · 03-06-2024, 09:25 AM

Many of these transfers cases do not have any speedometer seals installed from the factory.
It was ok if they leaked back when, I guess.

I have successfully added seals th the speedometer output.
I would plug it off if you have an electronic speedometer.

In regular speedometers the cable has nothing to do with it leaking or not.
A cap with a seal may help. A screw on thread protector will do nothing.

**DeadheadNM** · 03-06-2024, 04:58 PM

Maybe this plug is what you need: https://www.offroaddesign.com/np205-...20-thread.html

litebulblsc · 03-06-2024, 05:52 PM

My 72 had 1"-20 thread. I plugged it with the ORD plug when I installed my vss for my 4l80e

**Accelo** · 03-10-2024, 12:27 PM

Quote:

Originally Posted by litebulblsc

My 72 had 1"-20 thread. I plugged it with the ORD plug when I installed my vss for my 4l80e

They are not 1" X 20tpi.

litebulblsc · 03-10-2024, 01:25 PM

Quote:

Originally Posted by Accelo

They are not 1" X 20tpi.

Pull that piece out and measure it.

**DeadheadNM** · 03-08-2024, 11:14 AM

Think you could?

hemi43 · 03-08-2024, 01:39 PM

Quote:

Originally Posted by DeadheadNM

Think you could?

Considering I own a machine shop, probably in 10 minutes.

**DeadheadNM** · 03-08-2024, 02:09 PM

Quote:

Originally Posted by hemi43

Considering I own a machine shop, probably in 10 minutes.

Start the build thread

hemi43 · 03-08-2024, 04:27 PM

Quote:

Originally Posted by DeadheadNM

Start the build thread

I don't think there's much of a market for them which explains why they want $40. Much easier ways to make money.

**DeadheadNM** · 03-08-2024, 04:48 PM

I admire the skill that it would take to crank items like this out and was just curious how it would be done. I'll have to pay a visit to the shop if the border guards will allow me to cross

hemi43 · 03-08-2024, 06:55 PM

Quote:

Originally Posted by DeadheadNM

I admire the skill that it would take to crank items like this out and was just curious how it would be done. I'll have to pay a visit to the shop if the border guards will allow me to cross

These could be manually machined in 10 minutes, or <1 minute on a CNC lathe.
Real good profit at $40.

**jaros44sr** · 03-08-2024, 08:17 PM

Anythings possible when you have the tool

Let me see what a hexagon aluminum bar stock costs

20140917_111932 by

**Accelo** · 03-10-2024, 02:06 PM

You must have been talking bout the hole the speedo gear threads into.
I was just thinking a cap for the speedometer threads on the plug.
So you are correct.

**Accelo** · 03-11-2024, 09:27 AM

I made two of the plugs.
$20 each includes shipping.
I am only making two.

**DeadheadNM** · 03-11-2024, 09:42 AM

Nice work.

hemi43 · 03-13-2024, 09:34 AM

Quote:

Originally Posted by DeadheadNM

Nice work.

I agree, and at a very reasonable rate.
Will only be a matter of minutes now before the Gestapo swoops in and takes down this thread because God forbid if one member sells something to another member. That's one thing I hate about this site.

**DeadheadNM** · 03-13-2024, 10:15 AM

Just think, if you made and sold one or two you could actually pay to support this site as a member.

hemi43 · 03-14-2024, 09:13 AM

Quote:

Originally Posted by DeadheadNM

Just think, if you made and sold one or two you could actually pay to support this site as a member.

I used to run a site myself and it cost me nothing but time to do, so the answer to your question is NO. Besides, there's not enough traffic here to warrant it.
As I've said before, charge businesses to post ads on here, not individuals trying to build their trucks and sharing the odd part amongst each other.
If Billy wants to sell Bob a bolt for his truck, he should righfully be able to do so without having to pay an extortion fee. I'm sure you agree.

**DeadheadNM** · 03-14-2024, 05:33 PM

No. I don't agree with you on this.

**Accelo** · 03-16-2024, 10:31 PM

I should have posted this on the For Sale section.
Thanks for the reminder

**a Good Man** · 03-17-2024, 03:17 AM

This is my experience on the old system

https://67-72chevytrucks.com/vboard/...d.php?t=844431

03-05-2024, 08:03 PM	#1
Becabaum Registered User Join Date: Dec 2022 Location: Boerne Texas Posts: 2	NP205 Speedo delete I have a 72 Blazer that I recently had a LS swap performed on. I have a leak on the NP205 that I believe is coming from the speedo. I have attached photos. My question is what can I do to solve this. Can I cap it? If so, what size and thread is it? (I have searched and cant seem to find it). Should I remove it altogether and plug it? Thanks in advance Attached Images

03-05-2024, 08:52 PM	#2
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete Replace the seal in the adapter. See here: https://www.motorcityk5.com/i-13102-...=category:9415 This is designed to work w a speedo cable of course so may not be the cure. Other guys might have an idea about a possible cap. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-06-2024, 03:33 AM	#3
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,889	Re: NP205 Speedo delete Replacing the seal in the cable connection may do nothing if the cable is not attached. ORD sells caps. I purchased one as I no longer need the cable speedometer wih my LS swap. Cannot remember which one I purchased for my 72? https://www.offroaddesign.com/np205-...20-thread.html https://www.offroaddesign.com/np205-...20-thread.html Maybe I can check my past purchases? Sorry. past purchases are gone on my account, maybe call ORD and see which one they recommend? __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 Last edited by Richard; 03-06-2024 at 04:25 AM.

03-06-2024, 09:25 AM	#5
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,299	Re: NP205 Speedo delete Many of these transfers cases do not have any speedometer seals installed from the factory. It was ok if they leaked back when, I guess. I have successfully added seals th the speedometer output. I would plug it off if you have an electronic speedometer. In regular speedometers the cable has nothing to do with it leaking or not. A cap with a seal may help. A screw on thread protector will do nothing. Last edited by Accelo; 03-08-2024 at 04:20 PM.

03-06-2024, 04:58 PM	#6
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete Maybe this plug is what you need: https://www.offroaddesign.com/np205-...20-thread.html __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-06-2024, 05:52 PM	#7
litebulblsc Registered User Join Date: Aug 2006 Location: LaSalle Mi Posts: 525	Re: NP205 Speedo delete My 72 had 1"-20 thread. I plugged it with the ORD plug when I installed my vss for my 4l80e

03-08-2024, 11:14 AM	#10
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete Think you could? __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-08-2024, 04:48 PM	#14
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete I admire the skill that it would take to crank items like this out and was just curious how it would be done. I'll have to pay a visit to the shop if the border guards will allow me to cross __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-08-2024, 08:17 PM	#16
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,766	Re: NP205 Speedo delete Anythings possible when you have the tool Let me see what a hexagon aluminum bar stock costs 20140917_111932 by __________________ 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

03-10-2024, 02:06 PM	#17
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,299	Re: NP205 Speedo delete You must have been talking bout the hole the speedo gear threads into. I was just thinking a cap for the speedometer threads on the plug. So you are correct.

03-11-2024, 09:27 AM	#18
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,299	Re: NP205 Speedo delete I made two of the plugs. $20 each includes shipping. I am only making two. Attached Images

03-11-2024, 09:42 AM	#19
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete Nice work. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-13-2024, 10:15 AM	#21
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete Just think, if you made and sold one or two you could actually pay to support this site as a member. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-14-2024, 05:33 PM	#23
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: NP205 Speedo delete No. I don't agree with you on this. __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-16-2024, 10:31 PM	#24
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,299	Re: NP205 Speedo delete I should have posted this on the For Sale section. Thanks for the reminder



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03-17-2024, 03:17 AM	#25
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,062	Re: NP205 Speedo delete This is my experience on the old system https://67-72chevytrucks.com/vboard/...d.php?t=844431 __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

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