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Your bolts are M8-1.25 x 25mm Flanged Hex Head. Takes a 13mm wrench. They are available from McMaster Carr. Item #98093A543. Hope this helps.

Regarding the sending unit - The GM part number in the -34P technical manual is 25004140 as shown in Figure 18 on Page 56. I suggest you stay away from the Chinese junk and source a Spectre from Canada. You can get this from Kentucky Speed Shop- Lee Ingram at 859-707-8120. Just specify it is...

Can you post a photo of the bolt you need?

I just now looked in the -34P TM on page 43, Figure 13. Those bolts are part #1 I believe but the thread size is NOT identified. I probably have them in my metric bolt assortment. I’ll look tomorrow.

Let me look tomorrow.

Also, those are flanged head bolts without washers. The reason, if a washer were to break it would drop straight down into the timing chain causing catastrophic damage. I may have them in my parts bin. You only need 3.

That bolt size should be identified in the -34P Technical Manual. If you don’t have it, download it free from this site. Then find the exploded view page and identify the part number, then on the next page it will tell you the bolt size across from the part number. I believe those are metric...

Let me look in my spare parts bin tomorrow. I believe I may have a couple extra sleeves and Driven gears.

Make sure the shaft of the Driven gear is clean and greased.

You know, I believe you may have just discovered your problem. All Driven gears have a square hole on the end that protrudes from the sleeve, into which the speedometer cable end fits. It almost seems that you may have a piece of old cable broken off and still in the hole. Pull the sleeve back...

Here is a website with some great information pertaining to the Drive/Driven gears. https://www.tciauto.com/speedometer-gear-calculator I believe the adapter was installed on the M1009 so that the same Drive and Driven gears could be used in both the trucks and blazers. The CUCVs came from...

Sarge - Considering that you have replaced everything else, the only thing it could be is the "Speedometer Driven Gear Sleeve" located at the transfer case. See photos below. There is a Drive Gear inside the transfer case, and a Driven Gear in the sleeve. To confirm and rectify the issue...

OK here's another request for opinions regarding the new Spectre fuel tanks. Instead of painting them, what do you guys think about spraying them with undercoating prior to assembling them in the saddles and straps? I have the undercoating on-hand, and was just about ready to assemble the...

Marcus - could you share details of how your switch is wired? This subject has been hammered over the years however the new members may not know how to wire in a momentary switch to the blue wire at the card. Now that I think about it, I’m not sure I remember how to do it myself. Thanks for...

Marcus - could you share details of how your switch is wired? This subject has been hammered over the years however the new members may not know how to wire in a momentary switch to the blue wire at the card. Now that I think about it, I’m not sure I remember how to do it myself. Thanks for...

A couple years ago I had asked John at Hillbilly Wizard to let me know if he came across a pair of perfect original CUCV front fenders. Last fall he called me to say that he had just gotten in a parts truck with front fenders which looked new and if I wanted them they were $100 apiece. I almost...

I got the bed off and loaded onto my trailer. I was unsure how to transport the bed the 40 miles to Barry's metal fabrication shop, and also how he was going to be able to easily access the inner and outer sides of the work. The bed would not fit in-between the rails of my trailer, so I came...

I see your tanks are black. Are they painted steel or plastic?

I haven't posted since January because I have been dealing with a few new health issues. I am now scheduled for major surgery on Wednesday June 9. I have a couple of vertebras in my neck which are pressing against my spinal cord. If not fixed, either of the vertebrae could sever the spinal...

Frank, that’s only slightly more than $2 per minute. What’s wrong with that? Hail, if you’ve got the money and you want to keep your hands clean, it’s the only way to go.