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

**a Good Man** · 05-11-2023, 09:36 AM

HI ALL

I HAVE GMC JIMMY 4x4 1972 There is an Speedo leak . Is there a way to solve this problem ? Thanks

CKfan · 05-11-2023, 11:32 AM

Try pulling the Driven Gear Speedometer Sleeve. There should be an O-ring on the bottom between it and the transfer case. I am in the middle of tracking one down right now for mine. Goes where the arrow points.

**a Good Man** · 05-22-2023, 09:36 AM

Quote:

Originally Posted by CKfan

Try pulling the Driven Gear Speedometer Sleeve. There should be an O-ring on the bottom between it and the transfer case. I am in the middle of tracking one down right now for mine. Goes where the arrow points.

I think that this is the most appropriate solution in my opinion instead of the complete jaw, but what is the O-ring measurement?

**DeadheadNM** · 05-11-2023, 02:54 PM

Motor City K5 has what you guys need - It's the inner seal. Easy to press out the old one and press in the new.

**a Good Man** · 05-11-2023, 03:10 PM

Thank you guys, I would like to install it at home. Is there an installation video?

**DeadheadNM** · 05-11-2023, 04:04 PM

Quote:

Originally Posted by a Good Man

Thank you guys, I would like to install it at home. Is there an installation video?

See if the photos here suffice, worked well enough for me: https://www.motorcityk5.com/i-13102-...=category:9415

**a Good Man** · 05-22-2023, 09:37 AM

Quote:

Originally Posted by DeadheadNM

See if the photos here suffice, worked well enough for me: https://www.motorcityk5.com/i-13102-...=category:9415

I bought it but I'm afraid I didn't find the right screwdriver to open it because the space is too tight for the key .

**DeadheadNM** · 05-22-2023, 11:52 AM

Mine went in fine and immediately fixed the leak.

Just remembered this: Torqueking.com sells a new speedometer drive adapter nut that has a new sleeve installed. They are a good source for NP205 parts.

**a Good Man** · 05-23-2023, 01:52 PM

I am still at this stage haha I searched for special socket It’s a thin socket and did not find it to unlock this part.

**DeadheadNM** · 05-23-2023, 03:15 PM

Use a 12 point socket it will fit

**a Good Man** · 05-28-2023, 11:36 AM

Thank you sir, the job has been completed successfully

**DeadheadNM** · 05-28-2023, 01:22 PM

You bet - happy to hear that's fixed and thanks for the update.

**a Good Man** · 05-28-2023, 02:49 PM

Quote:

Originally Posted by DeadheadNM

You bet - happy to hear that's fixed and thanks for the update.

I am very happy to learn from you. I was able to make a special Socket .

**DeadheadNM** · 05-28-2023, 03:04 PM

You WIN! That's awesome.

CG · 05-28-2023, 07:16 PM

Wow, that's very cool you can make your own tools. Nicely done!

**a Good Man** · 05-29-2023, 07:55 AM

Thank you all . I also suspect this speedometer ratio adapter leaking as well . Would I like to exchange it for a new one . Where can I get a new one?

**Tmend** · 05-29-2023, 11:27 AM

4 screws and it opens. You can clean and replace the grease inside. The gaskets is most likely trash. I resealed mine using a very thing line of silicone.

**DeadheadNM** · 05-29-2023, 02:58 PM

Quote:

Originally Posted by Tmend

4 screws and it opens. You can clean and replace the grease inside. The gaskets is most likely trash. I resealed mine using a very thing line of silicone.

I'd try this first and if unsuccessful or you need a different ratio to make the speedometer read correctly contact these folks: https://speedometercablesusa.com/gear_box_adapters.html

They assembled the one in use on my Blazer and with US parts. I'm extremely pleased with their work. Heck, get a new speedometer cable too

**a Good Man** · 05-30-2023, 08:26 AM

Quote:

Originally Posted by Tmend

4 screws and it opens. You can clean and replace the grease inside. The gaskets is most likely trash. I resealed mine using a very thing line of silicone.

If he leaks again, I will burn the truck hahaha

**a Good Man** · 05-29-2023, 03:52 PM

I don't know how to thank you guys. I'm still learning a lot from you

**DeadheadNM** · 05-29-2023, 04:35 PM

Quote:

Originally Posted by a Good Man

I don't know how to thank you guys. I'm still learning a lot from you

Here's a thread I made on the ratio adapter they made: https://67-72chevytrucks.com/vboard/...d.php?t=804681

**a Good Man** · 05-30-2023, 08:31 AM

Quote:

Originally Posted by DeadheadNM

Here's a thread I made on the ratio adapter they made: https://67-72chevytrucks.com/vboard/...d.php?t=804681

I appreciate that sir , Thank you

**a Good Man** · 06-15-2023, 06:10 AM

We have an old Arabic proverb that says (the last remedy for the ironing problem) I will replace everything new. Thank you all

**a Good Man** · 06-15-2023, 07:43 AM

It has been installed and I hope it will not leak again.

**DeadheadNM** · 06-15-2023, 07:58 AM

Nice. Let us know how it works. Inshallah, no leak

05-11-2023, 09:36 AM	#1
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Speedo leak HI ALL I HAVE GMC JIMMY 4x4 1972 There is an Speedo leak . Is there a way to solve this problem ? Thanks Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

05-11-2023, 11:32 AM	#2
CKfan Registered User Join Date: Nov 2022 Location: CA Posts: 292	Re: Speedo leak Try pulling the Driven Gear Speedometer Sleeve. There should be an O-ring on the bottom between it and the transfer case. I am in the middle of tracking one down right now for mine. Goes where the arrow points. Attached Images

05-11-2023, 02:54 PM	#4
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak Motor City K5 has what you guys need - It's the inner seal. Easy to press out the old one and press in the new. __________________ 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

05-11-2023, 03:10 PM	#5
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak Thank you guys, I would like to install it at home. Is there an installation video? __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

05-22-2023, 11:52 AM	#8
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak Mine went in fine and immediately fixed the leak. Just remembered this: Torqueking.com sells a new speedometer drive adapter nut that has a new sleeve installed. They are a good source for NP205 parts. __________________ 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 Last edited by DeadheadNM; 05-22-2023 at 09:20 PM.

05-23-2023, 01:52 PM	#9
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak I am still at this stage haha I searched for special socket It’s a thin socket and did not find it to unlock this part. Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram Last edited by a Good Man; 05-23-2023 at 03:05 PM.

05-23-2023, 03:15 PM	#10
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak Use a 12 point socket it will fit __________________ 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

05-28-2023, 11:36 AM	#11
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak Thank you sir, the job has been completed successfully Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

05-28-2023, 01:22 PM	#12
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak You bet - happy to hear that's fixed and thanks for the update. __________________ 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

05-28-2023, 03:04 PM	#14
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak You WIN! That's awesome. __________________ 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

05-28-2023, 07:16 PM	#15
CG BlahBlahBlah Join Date: Feb 2002 Location: Wa. Posts: 20,019	Re: Speedo leak Wow, that's very cool you can make your own tools. Nicely done! __________________ … … … … … … … … ... … … … … … … … … … … …

05-29-2023, 07:55 AM	#16
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak Thank you all . I also suspect this speedometer ratio adapter leaking as well . Would I like to exchange it for a new one . Where can I get a new one? Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram Last edited by a Good Man; 05-29-2023 at 08:00 AM.

05-29-2023, 11:27 AM	#17
Tmend Senior Member Join Date: Nov 2010 Location: Reseda CA Posts: 1,305	Re: Speedo leak 4 screws and it opens. You can clean and replace the grease inside. The gaskets is most likely trash. I resealed mine using a very thing line of silicone. __________________ Some progress is better then no progress

05-29-2023, 03:52 PM	#20
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak I don't know how to thank you guys. I'm still learning a lot from you __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

06-15-2023, 06:10 AM	#23
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak We have an old Arabic proverb that says (the last remedy for the ironing problem) I will replace everything new. Thank you all Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram



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06-15-2023, 07:43 AM	#24
a Good Man Senior Member Join Date: Aug 2010 Location: FL Posts: 2,056	Re: Speedo leak It has been installed and I hope it will not leak again. Attached Images __________________ MY Facebook https://www.facebook.com/saad.alhajri.7106 ( saad_alhajri ) on Instagram

06-15-2023, 07:58 AM	#25
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,443	Re: Speedo leak Nice. Let us know how it works. Inshallah, no leak __________________ 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

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