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> Question for the gear shift experts: big scrap in R-1st shift plane on side shifter
raynekat
post Feb 3 2021, 07:07 PM
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I've got a 71 914-4 that I converted to a 914-6.
The problem is a very loud annoying squeak when I'm in the R-1st plane.
Something is really scraping badly.
Pulled the shifter which looks to have been changed out from an early shifter to a later shifter.
Greased it very well and that didn't seem to help.

So I looked a bit deeper and put a flashlight in the tunnel where the shifter sits pointing backwards.
Using a small mirror about 6-9" rearward, I see that the shift rod goes through a circular opening in a small bulkhead that is welded into the tunnel.

Looks like the scraping/squeaking is when the rod is hitting the edge of the circular opening in the bulkhead in the R-1st plane.
If you don't pull the lever all the way to the left, then you don't hear the scrape.

Is this typical of a side shifter conversion for an early 914?
Am I shifting incorrectly by pulling the lever hard to the left for the R-1st plane?
Does that bulkhead need to be removed by opening up the shift tunnel from above?

Any thoughts or ideas are welcome.
Thanks in advance.
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Retroracer
post Feb 6 2021, 04:56 PM
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So I just went through this recently - here's my findings, but obviously, as with most things with these 50 year old vehicles: YMMV.

My 1970 chassis had been converted to sideshift when I bought it. I only drove it home before stripping the car down for the -6 and GT conversion, so vaguely remembered it must have got into the gears....

On getting the car back on the road, I replaced the firewall bushing with a new nylon one, as well as getting a new PMS rear shift linkage (which misses the -6 headers) + brass bushing for the console. The shifting was OK but I - like you report - did detect a slight scraping in the R/1st plane. This never baulked any changes and was fine for a few thousand miles; until I noticed this scraping sharply deteriorating after WCR2020. To the point where I needed SERIOUS effort to move fore and aft when the lever was in the R/1st plane.

The fix for that appears in another thread on the world here http://www.914world.com/bbs2/index.php?showtopic=350350

but to summarize, the main (scraping) issue was solved by the combination of:

1) replacing the front shift linkage rod (which was an early one modified) with a proper sideshift one (special thanks @mepstein for his generosity), and
2) replacing the firewall bushing with a decently engineered one (Tangerine Racing in this case)

The combination of the above meant that no scraping is felt anywhere, and once adjusted, shifting is much more predictable. Main point here is that the front linkage rod diameter was larger than the later (sideshift) skinnier one - which MAY be your issue too.

- Tony
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Posts in this topic
raynekat   Question for the gear shift experts: big scrap in R-1st shift plane on side shifter   Feb 3 2021, 07:07 PM
BillC   As part of the conversion to a side-shift tranny, ...   Feb 3 2021, 07:43 PM
raynekat   As part of the conversion to a side-shift tranny,...   Feb 3 2021, 09:36 PM
raynekat   Here's the small hole through the bulkhead tha...   Feb 3 2021, 11:21 PM
windforfun   Here's the small hole through the bulkhead th...   Feb 6 2021, 07:25 PM
raynekat   Here's the small hole through the bulkhead t...   Feb 6 2021, 09:10 PM
raynekat   Decided I'm going in with scuba gear! As ...   Feb 5 2021, 09:45 PM
Montreal914   Good luck! :smash: ...while you are at it, yo...   Feb 5 2021, 10:50 PM
raynekat   Good luck! :smash: ...while you are at it, y...   Feb 6 2021, 01:27 AM
mepstein   Wont a jigsaw blade come close to the metal tubes?...   Feb 5 2021, 11:14 PM
raynekat   Wont a jigsaw blade come close to the metal tubes...   Feb 6 2021, 01:26 AM
Superhawk996   Wont a jigsaw blade come close to the metal tube...   Feb 6 2021, 10:58 AM
ChrisFoley   Is it possible to move the base of the shift lever...   Feb 6 2021, 07:03 AM
Cairo94507   I have ridden in a very nice 914-6 that seemed to ...   Feb 6 2021, 08:35 AM
mepstein   I have ridden in a very nice 914-6 that seemed to...   Feb 6 2021, 08:43 AM
gereed75   My original six with side shifter did this. From ...   Feb 6 2021, 09:50 AM
ChrisFoley   Never realized this clearance hole was different ...   Feb 6 2021, 11:06 AM
raynekat   The sideshift rod moves left and right at the shi...   Feb 6 2021, 03:43 PM
Krieger   I am glad you posted this. I have had this issue ...   Feb 6 2021, 10:19 AM
Retroracer   So I just went through this recently - here's ...   Feb 6 2021, 04:56 PM
raynekat   What a pain to remove the seats. I've got GTS ...   Feb 6 2021, 05:38 PM
914Toy   :popcorn:   Feb 6 2021, 06:41 PM
raynekat   Carpeting pealed back revealing the sound deadenin...   Feb 6 2021, 09:15 PM
raynekat   So how to cut the hole??? Many options. Jigsaw, ci...   Feb 6 2021, 09:27 PM
raynekat   So how'd we do? Here's the money shot. ...   Feb 6 2021, 09:34 PM
PlaysWithCars   Thanks to Raynecat for pointing me to his thread. ...   Feb 6 2021, 11:24 PM
Cairo94507   @rayneKat - Excellent photos and work. Looking f...   Feb 7 2021, 08:44 AM
mepstein   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Feb 7 2021, 01:51 PM
raynekat   [b]@[url=http://www.914world.com/bbs2/index.php?...   Feb 7 2021, 02:04 PM
zoomCat   What does this bulkhead look like on side shift ca...   Feb 7 2021, 01:33 PM
raynekat   That die grinder made quick work out of opening up...   Feb 7 2021, 01:49 PM
mepstein   A magnet might work well to clean up the shavings.   Feb 7 2021, 02:40 PM
raynekat   A magnet might work well to clean up the shavings...   Feb 7 2021, 04:07 PM
raynekat   I'll have to admit that this is a pretty crude...   Feb 7 2021, 06:30 PM
bkrantz   Doug, just a thought. How much bigger/wider do yo...   Feb 7 2021, 08:06 PM
raynekat   I likely needed more space than hitting a wedge in...   Feb 7 2021, 08:25 PM
PlaysWithCars   @bdstone914 Honestly I'm not sure if my car ...   Feb 7 2021, 08:41 PM
raynekat   My car was a 1971 914-4 chassis with the original ...   Feb 7 2021, 09:26 PM
raynekat   Took the car out for a quick spin today. So very ...   Feb 8 2021, 07:30 PM


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