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PeteyDaMan Samba Member
Joined: May 16, 2023 Posts: 18 Location: Chester, NY
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Posted: Fri May 26, 2023 6:02 am Post subject: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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Hi All,
When my buggy warms up it grinds when trying to put it in first or reverse.
When it's cold it goes into gear fine and has no slip.
I adjusted the clutch out a bit and it solved it for a while but it's back. The pedal is catching near the top so I don't think I can adjust it out much more.
It has a 65 swing axle trans and a 72 1600 DP.
Could it be the pilot busing or a bad clutch swelling as it heats up?
What would be a good replacement clutch kit that is streetable.
thanks _________________ Oh Lord, what have I gotten myself into this time...... |
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jpaull Samba Member
Joined: February 22, 2005 Posts: 3456 Location: Paradise, Ca
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Posted: Fri May 26, 2023 6:11 am Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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That is a trait of a clutch thats toast. Your engagement is telling you this too.
Pull the engine, resurface the flywheel, install a new pressure plate, disc, throwout bearing and pilot bearing. Do the rear main seal while you have your flywheel off. Dont forget the flywheel o-ring. _________________ [email protected] MPH 1/4 Mile & 8.1 @ 83.7MPH in 1/8 Mile with Mild Type 1 VW Mag Case 2234cc commuter engine in stock weight bug w/only .491 total lift(CB2292 Cam), 42x37 heads, 48idf's, Street tires, Belt on, Mufflers, Pump gas, video of the run here: https://youtu.be/M3SPqMOKAOg
Transmission by MCMScott:
Rhino case, Klinkenberg 4.12, Superdiff, 002 mainshaft with 091 first idler. Weddle 1.48 Third & 1.14 Fourth. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26740 Location: Colorado Springs
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Posted: Fri May 26, 2023 8:53 am Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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Yeah, most likely the pressure plate isn't releasing evenly. It's not going to fix itself. |
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PeteyDaMan Samba Member
Joined: May 16, 2023 Posts: 18 Location: Chester, NY
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modok Samba Member
Joined: October 30, 2009 Posts: 26740 Location: Colorado Springs
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Posted: Fri May 26, 2023 10:28 am Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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Don't know, haven't bought a new one in years. |
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74 Thing Samba Member
Joined: September 02, 2004 Posts: 7370
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Posted: Fri May 26, 2023 10:47 am Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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Make sure you have the flywheel double ground since the distance from the pressure plate mounting surface to the friction surface should be 21mm. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26740 Location: Colorado Springs
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Posted: Fri May 26, 2023 12:21 pm Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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Actually 21.1-21.2 if I recall.
I would search my posts to verify, I know we did the whole spec sheet before |
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31268 Location: Hot Arizona
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Posted: Fri May 26, 2023 2:44 pm Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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PeteyDaMan wrote: |
What would be a good replacement clutch?
The motor isn't built up so figure stockish power] |
I've been happy with the clutch pressure plate and disc from CB Performance in my mostly-stock 1970 sedan.
I use a 1980s-made Sachs pressure plate and newer standard spring disc in my 1971 with 1835cc engine. _________________ 1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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74 Thing Samba Member
Joined: September 02, 2004 Posts: 7370
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Posted: Fri May 26, 2023 3:20 pm Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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modok wrote: |
Actually 21.1-21.2 if I recall.
I would search my posts to verify, I know we did the whole spec sheet before |
I thought it was 21mm for 12v with the wear limit up to .840", and 6v was 24mm, but that is off of the top of my head and I could be wrong so you should double check or have your machinist double check. |
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modok Samba Member
Joined: October 30, 2009 Posts: 26740 Location: Colorado Springs
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oprn Samba Member
Joined: November 13, 2016 Posts: 12632 Location: Western Canada
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Posted: Sat May 27, 2023 5:21 am Post subject: Re: gears grinding when hot. Bad pilot bearing? Bad clutch? |
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I have never had a problem with the stock pressure plates on a stockish engine. Excellent trouble free service in multiple cars over 4 decades of driving. If you are running double the stock HP, have sticky tires, a heavy car and an itchy left foot then that's a different story.
In your case with a light Buggy and stock engine there is no need to buy another pressure plate unless it's broken which is possible but I highly doubt. _________________ We had the stone age, the bronze age, the industrial age and now we are in the age of mass deception and mind control for corporate profit. (The mass media age) |
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