Author Topic: Trouble Shifting  (Read 1720 times)

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Offline aberg83

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Trouble Shifting
« on: 20 June 2020, 16:38 »
I just picked up a (new to me) 68 autostick convertible. It is the one featured in the Youtube channel www.youtube.com/garagetime. The previous Owner documented his troubles with the original leaking transmission and then swapped in a spare that initially had the 'hockey stick' stuck in reverse and then upon fixing that, I understand from him that the transmission is no good. I bought the vehicle knowing that I would need to re-seal the original transmission (which he included) and swap it back in. Prior to doing this, I figured I would run through some troubleshooting steps just to be certain this was necessary and also just for my own learning benefit. I'm familiar with standard beetles, autostick is new to me.

With the engine off, I can run the shifter through all the gears. The solenoid at the control valve is good and clicks when touching the shifter. All hoses appear new. He refreshed the entire autostick setup and this is all covered in his Youtube channel. I had trouble getting the transmission to go into gear with the engine running. For the first time last night, after letting the engine warm up for a while, I was able to get it into a few of the gears. It eventually stalled on me, but I also need to do a tune-up as the car has sat for almost a year.

Given that I can run through the gears with the engine off, I suspect the transmission is okay. Also, given I was able to get it in gear a few times, I suspect the clutch assembly may be ok (if not just a little worn). When watching the clutch servo while my daughter was touching the gear shift, the arm only moves about 1/2". This seems too little. Perhaps the linkage just needs an adjustment.

Anything else I should try before re-sealing and swapping back in the original good transmission?

Thanks.
« Last Edit: 20 June 2020, 16:40 by aberg83 »

Offline sb001

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Re: Trouble Shifting
« Reply #1 on: 20 June 2020, 21:46 »
The first and easiest thing to check is the contact gap in the base of the shifter, however if your clutch servo arm is always moving when you (or your daughter) touch the gear shifter then that should be OK.
Then, test the clutch servo for a vacuum leak. You can do this with the canister in the car, but IMO a bit easier to do with it out of the car, just a few mounting bolts and the pivot pin holding the servo arm to the clutch arm.
Keep your thumb over the spigot where the vacuum hose attaches, pull outward on the canister arm and see if sucks back into the canister. If so the diaphragm inside the canister is shot and will need to be replaced. Several vendors sell repair kits.

Offline aberg83

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Re: Trouble Shifting
« Reply #2 on: 22 June 2020, 16:38 »
You nailed it. The diaphragm in the servo had come loose from the seam. It was actually intact. I re-installed it and voila! All is well. Thanks!

Offline 68autobug

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Re: Trouble Shifting
« Reply #3 on: 24 June 2020, 14:34 »
You nailed it. The diaphragm in the servo had come loose from the seam. It was actually intact. I re-installed it and voila! All is well. Thanks!

Well that is a weird problem....  it must have been repaired at some time ????
I have a repair kit for the clutch servo plus 2 spares...

Lee in Australia..

-- Helping keep Autostick beetles on the road --
   -1968 Silver metallic 1600 single port Beetle - with BOSCH  SVDA and new BROSOL H30/31 carburetor with GENIE Extractor exhaust system with a quiet thunderbird muffler

http://photobucket.com/68autobug

Offline aberg83

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Re: Trouble Shifting
« Reply #4 on: 24 June 2020, 14:37 »
You nailed it. The diaphragm in the servo had come loose from the seam. It was actually intact. I re-installed it and voila! All is well. Thanks!

Well that is a weird problem....  it must have been repaired at some time ????
I have a repair kit for the clutch servo plus 2 spares...

Lee in Australia..

Yes, the previous Owner rebuilt it not long ago and swapped into onto a different transmission. While doing that, it must have been pulled loose. I made sure it is nice and tight. Works great!

Offline muirfollower

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Trouble Shifting
« Reply #5 on: 28 March 2021, 23:08 »
Hello Everyone,

I am piggybacking on this older topic, because i feel like i am having similar situation as the posting. I have 71 Super Beetle, that was not running when i purchased it. After new plugs, engine oil, transmission fluid, adjusting the distributor(original) with new points and condenser, and an aftermarket 34 PICT( vac. port added per the DIY here on the forum) it's most what running. It's similar to the posting in that, with the engine off i can move the shifter to all gears. With the engine running(once i get it running) i only have neutral, there's no movement at all when trying to shit to the forward gears, and i don't try to force it, and that's applying downward pressure to the top of the shifter.
Here is is the difference though( and i don't what normal should be) with the engine off, ignition on, i can hear a "click" when move the shifter to a forward gear, BUT it "clicks" after it goes into the gear not before. Is this normal?
I haven't changed the 12mm hoses they are what came with the car, i swapped out the original solenoid valve( no change) and i haven't gotten underneath to look at the vacuum canister servo( i thnk i have a spare)
I had a previous Super Beetle here on the VWAR, but it was loaded with rust and rot so i had to part ways with it in order to buy this one, which is much better shape :) I really want to save it, drive it enjoy it, so any help or advice is greatly appreciated.

thanks!
Andrew



Offline 68autobug

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Re: Trouble Shifting
« Reply #6 on: 29 March 2021, 05:01 »
When You move the gear shifter slightly in any gear You should hear the click of the clutch being operated.... BEFORE it goes into gear... You  may need to adjust the points in the gear shifter... or the nylon bush below the gear shifter may need to be replaced... they will be worn out by now... white nylon bushing... vey cheap to buy... a bit difficult to fit... lubricate with grease ...  so, what is happening to Yours is that the clutch servo control valve isn't operating when You first move the gear shifter... No Click.. it should click as soon as You move the gear shifter forwards or backwards.... it shouldn't click if moved sideways... the vacuum hoses should be replaced.. You cannot see the cracks in the cotton covered hose... I use 12mm truck rubber pressure hose...  I don't actually hear a click when the shifter is moved with the ignition switched on, but I hear the noise of the clutch servo working... which is probably louder than the click of the control valve...  You don't seem to have any vacuum in the vacuum tank, so that means a leaking hose somewhere....  so once You have replaced all the vacuum hoses , maybe it will work ok ????? 


Lee in Australia
-- Helping keep Autostick beetles on the road --
   -1968 Silver metallic 1600 single port Beetle - with BOSCH  SVDA and new BROSOL H30/31 carburetor with GENIE Extractor exhaust system with a quiet thunderbird muffler

http://photobucket.com/68autobug

Offline muirfollower

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Re: Trouble Shifting
« Reply #7 on: 29 March 2021, 17:03 »
Thanks Lee, good to hear from you! As a plan, I think I will attempt to adjust the contact point in the shifter first, there is a how to here on the forum? Then I will try and reach the canister under the car, I have it up on jack supports(again), I think I have spare one in my pile of parts. And then order up some of the CohLine 12mm brake booster hose, maybe 6 feet(?) from Amazon

If a hose had fallen off say from the canister would it be loud and obvious if the engine were running?

I agree about the nylon bushing, I did a new one once before( in a stick shift) and destroyed it and my hands in the process of trying to get it in, must be a better way...


Offline 68autobug

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Re: Trouble Shifting
« Reply #8 on: 30 March 2021, 13:45 »
Yes, it seems to be a problem with the contact points in the shifter... the points maybe pitted etc.. or just worn ??  the contact should close as soon as you move the gear shifter forwards or backwards.... so the clutch is engaged so you can shift the gears.... place my points in the shifter and I did find it a bit fiddly to adjust.... but not impossible/...  the gap needs to be very close... the cotton covered hose that vw used is very prone to crack after 30++ years of service... so it can be difficult to find... I don't think you will find any hoses loose..   if you need to replace that bush [luckily I haven't needed to replace one as yet - keep them greased] but from all accounts , it is very difficult...   now measuring the clutch adjuster is nearly impossible.. I made two of the measuring bits that are shown in manuals but never did any good... so I always just keep the adjuster so You can select reverse without crunching.... adjusting about 1/2 a turn a time when you can select gears....
 best of luck...
Lee in Australia



-- Helping keep Autostick beetles on the road --
   -1968 Silver metallic 1600 single port Beetle - with BOSCH  SVDA and new BROSOL H30/31 carburetor with GENIE Extractor exhaust system with a quiet thunderbird muffler

http://photobucket.com/68autobug

Offline muirfollower

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Re: Trouble Shifting
« Reply #9 on: 30 March 2021, 16:10 »
Appreciate it Lee, in the box of spares that came with the car was a canister, I suspect was the original vacuum canister servo and it did not hold a vacuum ( pulled up on pin/sleeve and finger over the port) so I got to wonder about what is under the car on top of the A/S Transmission? Reached up to the canister and the hose was absolutely loose on the VC fitting, no pressure fitment at all. Turns out the hose are aftermarket, not the originals. So now my plan to try and put a hose clamp on it and see what happens and try and adjust the contact point in the shifter( also got a spare shifter from a friend as a backup)

thanks!

Offline 68autobug

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Re: Trouble Shifting
« Reply #10 on: 30 March 2021, 21:10 »
Yes, the normal hose , [I used truck/trailer brake hose 12mm id] and it is a good fit although I do use good hose clamps on the hoses...  Problem that so many things can get changed over the years....


Lee in Australia.. RHD  1500 1968 semi auto Beetle..
-- Helping keep Autostick beetles on the road --
   -1968 Silver metallic 1600 single port Beetle - with BOSCH  SVDA and new BROSOL H30/31 carburetor with GENIE Extractor exhaust system with a quiet thunderbird muffler

http://photobucket.com/68autobug

Offline volkenstein

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Re: Trouble Shifting
« Reply #11 on: 01 April 2021, 03:37 »
muirfollower,
                 Make sure it is the re-inforced type. Search on posts here - common problem. Normal hose collapses. Also - check that the spigot itself is not loose. Happened on a vac can I bought second hand. Peined it and sealed it stopped the leak.

HTH
Volkenstein
'71 RHD A-S Super - "Klaus"

Offline muirfollower

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Re: Trouble Shifting
« Reply #12 on: 10 April 2021, 22:35 »
Thanks for all the help from everyone, I check the points clean them reset the gap, and did find out that the hose was completely loose on the canister underneath the car used to clamp on it to tighten it up and it's very secure before doing that check that it held a vacuum which it does finger over the spicket method. Still no dice as far as being able to get it in gear with the engine running. But.. I did notice that when I tried to put it in reverse with the engine running it grinds and I don't push the issue I just back off. The aftermarket carburetor that I drilled out for the port I noticed something with the engine running I hooked up a vacuum dial to it and it shows zero vacuum would this be considered normal?

Offline volkenstein

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Re: Trouble Shifting
« Reply #13 on: 13 April 2021, 09:21 »
muirfollower,
                  At idle, the CV port should show next to nothing.   Check when engine is running off idle. 5 in/hg is all it takes to work the CV. Speaking of which - adjusted to spec? start point 2 1/2 threads exposed on the adjuster. You need to test your CV can hold 5 in/hg vacuum too.

You grind in reverse - you need to adjust the CV servo arm (that connects to the clutch arm) for freeplay. Sounds like you have too much. Search here and the OLD forum.

HTH
Volkenstein
'71 RHD A-S Super - "Klaus"

Offline muirfollower

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Re: Trouble Shifting
« Reply #14 on: 13 April 2021, 22:31 »
Ok, thanks on the 34 pict vacuum port and the Control valve is the original, still has the little protective cap on top, screw measurement is about 2 & 1/2+ threads exposed on top.
 

 

anything