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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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 Posted: Tue Jul 15, 2025 7:37 pm Post subject: RGB identification Needed |
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In the process of cleaning up a transmission on a 64 panel bus recently acquired. Some odd ball things going on with it. Tried to search up varied things, but that led to more confusion. I need to know what I have and/or how to proceed with the best options for me as I am going to run the RGB. Any help is appreciated. Thanks!
The driver side nut is a 46mm, while the passenger side was not. This was my first red flag. Essentially, one side axle snub is smaller than the other. Is it a big nut trans? Is it best to find another large snub axle? What needs to be done. I will be running 15 stock wheels.
It has 64-67 brakes, backing plates, and drums.
Pictures of the trans are below.
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sub-hatchtim
Samba Member
Joined: September 19, 2006
Posts: 2667
Location: Phoenix AZ
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| Posted: Tue Jul 15, 2025 9:34 pm Post subject: Re: RGB identification Needed |
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Open up the boxes and count the teeth
If the ratios match you're good
"I'm pretty sure"
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Clara 
Samba Member
Joined: June 14, 2003
Posts: 12605
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| Posted: Wed Jul 16, 2025 8:42 am Post subject: Re: RGB identification Needed |
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one ton RGBs have that circle /plug on the side to the spring plate.
so both sides are one ton.
1 ton brakes look like this:
You can remove the RGB fill plug, turn the stub axle, and count teeth on upper gear. Mark on tooth with a sharpie or something?
do that on both sides, do they match?
If you have little nut one ton on one side, and big nut one ton the other , that's fine. the gearing and brakes match.
but if you have plugs on both side, how does that have little nut?
the brakes you posted the pic of are one ton.
what do the other side brakes look like? Are they mirror image?
are the drums the same depth?
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Wed Jul 16, 2025 1:33 pm Post subject: Re: RGB identification Needed |
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| Clara wrote: |
one ton RGBs have that circle /plug on the side to the spring plate.
so both sides are one ton.
1 ton brakes look like this:
You can remove the RGB fill plug, turn the stub axle, and count teeth on upper gear. Mark on tooth with a sharpie or something?
do that on both sides, do they match?
If you have little nut one ton on one side, and big nut one ton the other , that's fine. the gearing and brakes match.
but if you have plugs on both side, how does that have little nut?
the brakes you posted the pic of are one ton.
what do the other side brakes look like? Are they mirror image?
are the drums the same depth? |
Little bit of confusion here- what circle are plug are you referencing? I took off the covers on both sides and the gearing matched. The top gears have 19 teeth and the bottom have 24 teeth.
The brakes are both the same on both sides. The drums are the same depth as well with the same part # indicating 64-67. I have included pictures below of both.
So what exactly do I have going on? What's the best fix for it?
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BarryL
Samba Member
Joined: November 01, 2004
Posts: 15209
Location: Casa de Oro, California
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| Posted: Wed Jul 16, 2025 6:35 pm Post subject: Re: RGB identification Needed |
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| 65Bugsmasher wrote: |
| The driver side nut is a 46mm, while the passenger side was not. |
Neither of the nuts are VW. I think maybe someone tried to fix a buggered thread. Show a photo of each thread. |
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Wed Jul 16, 2025 7:03 pm Post subject: Re: RGB identification Needed |
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| BarryL wrote: |
| 65Bugsmasher wrote: |
| The driver side nut is a 46mm, while the passenger side was not. |
Neither of the nuts are VW. I think maybe someone tried to fix a buggered thread. Show a photo of each thread. |
The large nut does measure as 46mm.
The other nut is a tad larger than 36mm (micrometer put it at 38mm nut)
Picture of threads is below. When measuring, the axle spline areas measured the same. Additionally, the length of threads is the same from end of spline to end of threads (1 and 3/16).
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 25904
Location: Olympia Wash Rinse & Repeat
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| Posted: Thu Jul 17, 2025 1:32 pm Post subject: Re: RGB identification Needed |
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| 65Bugsmasher wrote: |
Little bit of confusion here- what circle are plug are you referencing? |
Biggest roundy thing in the below image:
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 25904
Location: Olympia Wash Rinse & Repeat
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| Posted: Thu Jul 17, 2025 1:45 pm Post subject: Re: RGB identification Needed |
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The below 3/4 ton RGB with no roundy pluggy thing:
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Clara
Samba Member
Joined: June 14, 2003
Posts: 12605
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| Posted: Thu Jul 17, 2025 2:07 pm Post subject: Re: RGB identification Needed |
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| 65Bugsmasher wrote: |
| BarryL wrote: |
| 65Bugsmasher wrote: |
| The driver side nut is a 46mm, while the passenger side was not. |
Neither of the nuts are VW. I think maybe someone tried to fix a buggered thread. Show a photo of each thread. |
The large nut does measure as 46mm.
The other nut is a tad larger than 36mm (micrometer put it at 38mm nut)
Picture of threads is below. When measuring, the axle spline areas measured the same. Additionally, the length of threads is the same from end of spline to end of threads (1 and 3/16).
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Looks like the threads on one is smaller than the other. They should be the same.
I'd think the threads on one side were messed up, and they cut it down and re-tapped it to a smaller size.
what to do?
if the nut holds the torque on the thread, you can just use it as it.
or,
replace the stub axle and nut.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 25904
Location: Olympia Wash Rinse & Repeat
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| Posted: Thu Jul 17, 2025 3:48 pm Post subject: Re: RGB identification Needed |
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Really should have the new reprint of the original VW dealer workshop manual. Back in the day that manual was ONLY for VW employees eyes!! Yes it is a bit expensive, but it has two to three times the info of any other manual out on the market. So it is a worth every cent, and will greatly help to keep you from wrecking your bus and/or injuring you and any passengers you have and any others in cars you encounter.......
http://www.bentleypublishers.com/volkswagen/repair-information/vw-type-2-63-67-repair-manual.html
You can find a good used copy in the classifieds for less if you search often!!
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Thu Jul 17, 2025 5:39 pm Post subject: Re: RGB identification Needed |
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| Eric&Barb wrote: |
Really should have the new reprint of the original VW dealer workshop manual. Back in the day that manual was ONLY for VW employees eyes!! Yes it is a bit expensive, but it has two to three times the info of any other manual out on the market. So it is a worth every cent, and will greatly help to keep you from wrecking your bus and/or injuring you and any passengers you have and any others in cars you encounter.......
http://www.bentleypublishers.com/volkswagen/repair-information/vw-type-2-63-67-repair-manual.html
You can find a good used copy in the classifieds for less if you search often!! |
I have the copy and am currently looking at it. I normally use it religiously but posted here because the reduction gear stuff had me confused as there were different options. All my other buses are lowered so this will be my first stock height one. |
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Thu Jul 17, 2025 5:40 pm Post subject: Re: RGB identification Needed |
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| Clara wrote: |
| 65Bugsmasher wrote: |
| BarryL wrote: |
| 65Bugsmasher wrote: |
| The driver side nut is a 46mm, while the passenger side was not. |
Neither of the nuts are VW. I think maybe someone tried to fix a buggered thread. Show a photo of each thread. |
The large nut does measure as 46mm.
The other nut is a tad larger than 36mm (micrometer put it at 38mm nut)
Picture of threads is below. When measuring, the axle spline areas measured the same. Additionally, the length of threads is the same from end of spline to end of threads (1 and 3/16).
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Looks like the threads on one is smaller than the other. They should be the same.
I'd think the threads on one side were messed up, and they cut it down and re-tapped it to a smaller size.
what to do?
if the nut holds the torque on the thread, you can just use it as it.
or,
replace the stub axle and nut. |
Thanks for the insight. I think for piece of mind, I may replace the snub axle.
Looked over the Bentley for procedure as well as hazlet guys thread and does not look too bad.
What sealing compound does everyone recommend for the circle plug when putting a new one in? |
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BarryL
Samba Member
Joined: November 01, 2004
Posts: 15209
Location: Casa de Oro, California
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| Posted: Thu Jul 17, 2025 6:37 pm Post subject: Re: RGB identification Needed |
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This is the kind of Big Nut you should have.
It's kinda like your bigger Big Nut. I'd try to find both your nuts in a style more like the correct nut and go ahead and use them as is. |
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Lind
Samba Member
Joined: November 06, 2000
Posts: 10212
Location: idaho
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| Posted: Thu Jul 17, 2025 9:04 pm Post subject: Re: RGB identification Needed |
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| Eric&Barb wrote: |
Really should have the new reprint of the original VW dealer workshop manual. Back in the day that manual was ONLY for VW employees eyes!! Yes it is a bit expensive, but it has two to three times the info of any other manual out on the market. So it is a worth every cent, and will greatly help to keep you from wrecking your bus and/or injuring you and any passengers you have and any others in cars you encounter.......
http://www.bentleypublishers.com/volkswagen/repair-information/vw-type-2-63-67-repair-manual.html
You can find a good used copy in the classifieds for less if you search often!! |
VW published a comprehensive manual with the same information for public consumption starting in 1964.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 25904
Location: Olympia Wash Rinse & Repeat
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| Posted: Thu Jul 17, 2025 10:02 pm Post subject: Re: RGB identification Needed |
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| Lind wrote: |
VW published a comprehensive manual with the same information for public consumption starting in 1964. |
Personally would not use the word comprehensive for that manual since it is akin to a Reader's Digest version of the workshop manual. Good one to have for sure, but the workshop manual is much much better.
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sub-hatchtim
Samba Member
Joined: September 19, 2006
Posts: 2667
Location: Phoenix AZ
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| Posted: Fri Jul 18, 2025 7:18 am Post subject: Re: RGB identification Needed |
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Im guessing that the threads on one of your axles were messed up, they turned new threads
If you don't care about mix matched nuts reassemble and go down the road. If non matching nuts bugs you find a replacement stub
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58 Dove blue singlecab
76 911S |
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Sat Jul 19, 2025 7:49 am Post subject: Re: RGB identification Needed |
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| sub-hatchtim wrote: |
Im guessing that the threads on one of your axles were messed up, they turned new threads
If you don't care about mix matched nuts reassemble and go down the road. If non matching nuts bugs you find a replacement stub |
As an update for everyone- I went ahead with the lower snub axle replacement. I am glad I did as there was some serious hackery going on. The nut was no longer a nut (as seen in pictures). When going to take it off, I was able to knock it loose with a screwdriver and hammer in the ridges cut. Glad I went through with this.
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chrisflstf
Samba Member
Joined: February 10, 2004
Posts: 4032
Location: San Diego
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| Posted: Sat Jul 19, 2025 9:38 am Post subject: Re: RGB identification Needed |
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| Do you already have a replacement stub axle and nut? |
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65Bugsmasher
Samba Member
Joined: August 12, 2012
Posts: 191
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| Posted: Sat Jul 19, 2025 10:09 am Post subject: Re: RGB identification Needed |
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| chrisflstf wrote: |
| Do you already have a replacement stub axle and nut? |
I have a replacement snub axle. I do not have another nut though. I think WW sells them. |
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BarryL
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Joined: November 01, 2004
Posts: 15209
Location: Casa de Oro, California
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| Posted: Sat Jul 19, 2025 6:30 pm Post subject: Re: RGB identification Needed |
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That looks like a Honda motorcycle clutch nut. You could probably reuse it if you had to. They sell a tool for it with 4 tabs and 3/8" ratchet wrench fit. |
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