Stock shift knob comes off…, Aand it’s always at the wrong time |
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Stock shift knob comes off…, Aand it’s always at the wrong time |
peteinjp |
Nov 2 2022, 04:49 AM
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#1
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Member Group: Members Posts: 201 Joined: 15-July 21 From: Japan Member No.: 25,723 Region Association: None |
So yeah – like the title says. We have such excellent driving roads for the 914 here. Curve after curve after curve with a nice long straight soft band head followed by tight right hander. Hard on the brakes- heel toe go for the downshift to 3rd timed right at entry and%^]!*|!}. …. Knob in hand car in neutral little harder on the brakes. Front starts to wash out- little softer on the brakes and coast through. Whew. I’m just not used to going into a corner without decel and I don’t like it one bit.
So- how are these held on?? Mine has some type of wavy shim but that’s not nearly enough. Pete |
VaccaRabite |
Nov 2 2022, 06:07 AM
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#2
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En Garde! Group: Admin Posts: 13,443 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
You need to replace the crush ring. You may also have a slightly cracked knob that is expanding juuuust enough to keep the crush ring from doing its job.
You can try a paper shim to add a little more grab to your crush ring, but you should not need to. If you try this cut a strip of computer paper about 13mm wide, and put it over the top of the shifter rod. Then drive the knob and crush ring down over the top of it. I have also installed stockish knobs using just paper an no crush ring. You need to fold the paper a few times and then drive the knob down over it as above. I've also used felt. Whatever so long as you are getting a tight friction fit. Zach |
KELTY360 |
Nov 2 2022, 06:50 AM
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#3
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914 Neferati Group: Members Posts: 5,031 Joined: 31-December 05 From: Pt. Townsend, WA Member No.: 5,344 Region Association: Pacific Northwest |
You might also try a lighter grip on the knob. That was a lesson I learned back in 1973 when the knob came off multiple times and I finally changed grip pressure.
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Cairo94507 |
Nov 2 2022, 06:58 AM
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#4
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Michael Group: Members Posts: 9,758 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California |
I agree with VacaRabite - check the knob to be sure it is not cracked along the base/shaft. Order a new crush ring or 3 (IMG:style_emoticons/default/biggrin.gif) . Clean everything and install the knob. It took me a few tries to get mine installed correctly so it was tight. Good luck. (IMG:style_emoticons/default/beerchug.gif)
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Steve |
Nov 2 2022, 08:42 AM
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#5
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914 Guru Group: Members Posts: 5,585 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
I wrapped a piece of black electrical tape around the top of the shaft and then used the insert and knob. Nice tight fit.
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bdstone914 |
Nov 2 2022, 09:00 AM
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#6
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bdstone914 Group: Members Posts: 4,520 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
So yeah – like the title says. We have such excellent driving roads for the 914 here. Curve after curve after curve with a nice long straight soft band head followed by tight right hander. Hard on the brakes- heel toe go for the downshift to 3rd timed right at entry and%^]!*|!}. …. Knob in hand car in neutral little harder on the brakes. Front starts to wash out- little softer on the brakes and coast through. Whew. I’m just not used to going into a corner without decel and I don’t like it one bit. So- how are these held on?? Mine has some type of wavy shim but that’s not nearly enough. Pete Use a genuine Porsche crush ring. I noticed the Dansk rings are a poor fit. |
NARP74 |
Nov 2 2022, 09:15 AM
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#7
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Senior Member Group: Members Posts: 1,063 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
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GregAmy |
Nov 2 2022, 09:15 AM
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#8
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Advanced Member Group: Members Posts: 2,298 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
914Rubber sells them, too. That fixed mine.
https://914rubber.com/shifter-crush-sleeve @Mikey914 , Mark you should add a CNAME DNS record of www.914rubber.com pointing to 914rubber.com. Using the "www" fails as "cannot be found" and I'm sure that may be affecting your web traffic... |
jhynesrockmtn |
Nov 2 2022, 12:13 PM
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#9
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Member Group: Members Posts: 418 Joined: 13-June 16 From: spokane wa Member No.: 20,100 Region Association: Pacific Northwest |
The 74 I bought had a new aftermarket shift knob that was softer than an original. I found the original one in the glovebox. Put it on, hasn't come off since.
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StarBear |
Nov 2 2022, 01:22 PM
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#10
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Senior Member Group: Members Posts: 1,884 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States |
I wrapped a piece of black electrical tape around the top of the shaft and then used the insert and knob. Nice tight fit. (IMG:style_emoticons/default/agree.gif) |
914sgofast2 |
Nov 2 2022, 02:41 PM
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#11
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Senior Member Group: Members Posts: 616 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
2 word solution to fix it:
Duct Tape! |
TheCabinetmaker |
Nov 2 2022, 03:44 PM
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#12
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Get a real crush ring
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NARP74 |
Nov 2 2022, 04:12 PM
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#13
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Senior Member Group: Members Posts: 1,063 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
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peteinjp |
Nov 2 2022, 04:13 PM
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#14
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Member Group: Members Posts: 201 Joined: 15-July 21 From: Japan Member No.: 25,723 Region Association: None |
Ok- thanks guys. I'll check the knob for cracks and get a new crush ring and see how that goes. I lightened up my grip after the first time and had no problems but its a bit loose anyway. I watched a vid of Walter Rohrl recently and he drives like hell with just his finger tips dancing on the wheel.... lessons to be learned in grace for sure.
Pete |
emerygt350 |
Nov 2 2022, 07:53 PM
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#15
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Last time I autocrossed mine, best run of the day, shifted into 3rd, cause I was going that fast, knob comes off, throw the knob and get it into gear, swearing up a storm. Pull up into grid "oh no, where did I throw that almost irreplaceable original 200 dollar piece of my car..."
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Mikey914 |
Nov 2 2022, 10:59 PM
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#16
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The rubber man Group: Members Posts: 12,661 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
914Rubber sells them, too. That fixed mine. https://914rubber.com/shifter-crush-sleeve @Mikey914 , Mark you should add a CNAME DNS record of www.914rubber.com pointing to 914rubber.com. Using the "www" fails as "cannot be found" and I'm sure that may be affecting your web traffic... Thanks, I'll check it out. -Mark PS We make a version with an allen set screw. I will do more up. -Mark |
mlindner |
Nov 3 2022, 04:29 AM
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#17
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Senior Member Group: Members Posts: 1,520 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest |
I drilled and taped near the bottom and put in a grub screw. Problem solved.
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peteinjp |
Nov 3 2022, 05:41 AM
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#18
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Member Group: Members Posts: 201 Joined: 15-July 21 From: Japan Member No.: 25,723 Region Association: None |
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Cairo94507 |
Nov 3 2022, 09:16 AM
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#19
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Michael Group: Members Posts: 9,758 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California |
I would be concerned about cracking the base of the knob if I drilled and tapped it for a screw. I used a new crush-ring and mine is nice and tight. I do like the block of wood ( @NARP74 ) that fits the diameter of the knob so you can evenly tap it to make sure it is seated all the way down onto the shifter. (IMG:style_emoticons/default/beerchug.gif)
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Mikey914 |
Nov 3 2022, 09:17 AM
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#20
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The rubber man Group: Members Posts: 12,661 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
You can add a dab of epoxy. It will grab onto the shifter, but can be broken loose to remove. It's probably the best alternative for a stock knob. Yes the stock will crack.
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