My Gear Leaver moves - Alfa Romeo Bulletin Board & Forums
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post #1 of 11 (permalink) Old 11-27-2018, 06:42 PM Thread Starter
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My Gear Leaver moves

Hi All,

I have a problem with my gear leaver moving. I admit it get's a beating as it is in my race car. However I have tried new bolts and nuts and am lost as to why I can't get it right. I can buy a $1100 Alfaholics gear leaver set up, but this is a little bit excessive. Any thoughts would be most welcome.
Ciao
Jim
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post #2 of 11 (permalink) Old 11-27-2018, 10:48 PM
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If your "moving" is rotation on the post out of the transmission tower, the cause if often a 6mm bolt in the pinch bottom of the lever. This is the only 7mm, hardened bolt on these cars. It's hardened so you can tighten it down firmly, so the bottom pinch section really grabs the post, but both the holes in the pinch section, and notch in the post, are cut for a 7mm bolt, not 6mm. After racing these for many years, the loose ones often have either inadequate torque on the bolt, the wrong size bolt, or both.
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post #3 of 11 (permalink) Old 11-27-2018, 11:17 PM
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My GTV does the rotate thing and has worn a slot, I think from memory, in the gear lever hole. Will need welding up and redrilling to fix.
Pete

'71 1750 Series 2 GTV:
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156 Series 1 v6 ... and remember it's all just opinions
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post #4 of 11 (permalink) Old 11-28-2018, 03:28 AM
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This hardened (grade 10.9) shouldered hex head cap screw (bolt) is 7 x 1 x 30mm. The 7mm nut however is listed as a grade 8.8.

Jim

Series 2 USA 1750 GTV (in Series 1 European clothing)
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post #5 of 11 (permalink) Old 11-28-2018, 05:46 AM
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Strip the nut threads before breaking the bolt? hum, more likely just feel the nut threads stretching as you tighten correctly.


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post #6 of 11 (permalink) Old 11-28-2018, 04:30 PM Thread Starter
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Thanks for the help. I have replaced the bolt with new hardened nut/bolt it has improved it but it happened again on the Weekend. It's a bugger to try and find gears after that. Should I persevere or is there permanent fix
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Jim
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post #7 of 11 (permalink) Old 11-28-2018, 08:26 PM
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Isn't there a washer of some type that should be on there? What about some loctite?

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post #8 of 11 (permalink) Old 11-28-2018, 08:38 PM Thread Starter
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Thanks ossodiseppia, I have the wave washer on. I'm not sure about loctite.
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post #9 of 11 (permalink) Old 11-29-2018, 03:20 AM
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Quote:
Originally Posted by jg1053 View Post
I have replaced the bolt with new hardened nut/bolt it has improved it but it happened again on the Weekend.
Is the bolt a 6 or 7mm?
A shouldered 7mm bolt is specified with the idea being the unthreaded portion of the bolt fits with less movement in the gearbox stub shifter notch. A 6mm bolt, hardened and/or shouldered or not, just may not do the job. With shifter movement over a period of time, your shifter and/or the stub shifter may be worn to the point that the correct bolt would not longer work anyway. If this is the case, one solution is to replace the worn part(s). Another solution was posted by @Alfar7. I'll see if I can find the post...

EDIT; found it. Please click here.

Jim

Series 2 USA 1750 GTV (in Series 1 European clothing)

Last edited by papajam; 11-29-2018 at 03:54 AM. Reason: add edit
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post #10 of 11 (permalink) Old 11-29-2018, 07:58 AM
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I think this thread IS headed into the 100% FIXED-IT direction. It may be, as Jim suggests above, that running it moving without the 7mm bolt with unthreaded section through the pinch section has worn the stub notch and a weld might be required to fix it, or almost easier, a replacement of the crucifix component with a better stub groove.


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post #11 of 11 (permalink) Old 11-29-2018, 03:10 PM Thread Starter
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Thanks Jim And Gordon. I have it.
Jim
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