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-   -   Speedo leak (https://67-72chevytrucks.com/vboard/showthread.php?t=844431)

a Good Man 05-11-2023 09:36 AM

Speedo leak
 
4 Attachment(s)


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

Re: Speedo leak
 
1 Attachment(s)
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.

DeadheadNM 05-11-2023 02:54 PM

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.

a Good Man 05-11-2023 03:10 PM

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

DeadheadNM 05-11-2023 04:04 PM

Re: Speedo leak
 
Quote:

Originally Posted by a Good Man (Post 9203276)
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 09:36 AM

Re: Speedo leak
 
Quote:

Originally Posted by CKfan (Post 9203226)
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?

a Good Man 05-22-2023 09:37 AM

Re: Speedo leak
 
Quote:

Originally Posted by DeadheadNM (Post 9203287)
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

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.

a Good Man 05-23-2023 01:52 PM

Re: Speedo leak
 
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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

Re: Speedo leak
 
Use a 12 point socket it will fit

a Good Man 05-28-2023 11:36 AM

Re: Speedo leak
 
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Thank you sir, the job has been completed successfully

DeadheadNM 05-28-2023 01:22 PM

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

a Good Man 05-28-2023 02:49 PM

Re: Speedo leak
 
1 Attachment(s)
Quote:

Originally Posted by DeadheadNM (Post 9207740)
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

Re: Speedo leak
 
You WIN! That's awesome.

CG 05-28-2023 07:16 PM

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

a Good Man 05-29-2023 07:55 AM

Re: Speedo leak
 
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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

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.

DeadheadNM 05-29-2023 02:58 PM

Re: Speedo leak
 
Quote:

Originally Posted by Tmend (Post 9207899)
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 05-29-2023 03:52 PM

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

DeadheadNM 05-29-2023 04:35 PM

Re: Speedo leak
 
Quote:

Originally Posted by a Good Man (Post 9207941)
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 08:26 AM

Re: Speedo leak
 
4 Attachment(s)
Quote:

Originally Posted by Tmend (Post 9207899)
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 05-30-2023 08:31 AM

Re: Speedo leak
 
Quote:

Originally Posted by DeadheadNM (Post 9207947)
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

Re: Speedo leak
 
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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

Re: Speedo leak
 
1 Attachment(s)
It has been installed and I hope it will not leak again.

DeadheadNM 06-15-2023 07:58 AM

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


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