 Interference with shift rod, Interference with shift rod |
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| 914racer |
 May 22 2025, 02:19 PM
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#1
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Newbie  Group: Members Posts: 17 Joined: 4-January 11 From: Cincinnati, OH. Member No.: 12,564 Region Association: None  |
I converted a 4 to 6 in a 71. I also have a short shifter and the necessary spacer installed. The shift rod in the tunnel is scraping a gusset and causing a loud squeaking when put in reverse or 1st and slightly less squeak sound going into 4th and 5th. I have a video taken in the tunnel showing how it's interfering with the shift rod. Has anyone else had this issue and have a solution other than drilling a hole with a hole saw on the top of the tunnel and grinding some of the gusset for clearance? Thanks
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| brant |
May 22 2025, 03:00 PM
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#2
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914 Wizard Group: Members Posts: 11,969 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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we all had to bend the shift rod.
Edit Re read Inside the tunnel is likely the seatbelt anchor |
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| mepstein |
May 22 2025, 03:23 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,919 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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Most common problem is a too long seatbelt bolt that interferes with the rod.
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| Montreal914 |
May 23 2025, 08:44 AM
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#4
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Senior Member Group: Members Posts: 1,833 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California
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The tail shifter tunnel rod was suported by the rear and front bushing. In its function the rod was rotating on its axis and sliding back and forth (no lateral movement).
The side shiter tunnel rod actually moves left and right at the shifter and pivots in the rear bushing (like a spherical bushing). To allow this left and right motion, the tunnel partial bulkhead through which the rod goes through was enlarged in 73 to allow its lateral movement. Unfortunately, it is very difficult to access that bulkhead to elarge it on the 70-72 cars. I guess the rod bending trick is the easiest solution. (IMG:style_emoticons/default/smile.gif) |
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| rudedude |
May 23 2025, 09:56 AM
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#5
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Senior Member Group: Members Posts: 521 Joined: 1-January 05 From: minneapolis, mn Member No.: 3,387 Region Association: Upper MidWest
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All I had to do was loosen the shifter base and move it a tiny bit. It is probably rubbing on a sheet metal support in the tunnel.
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| ChrisFoley |
May 23 2025, 12:55 PM
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#6
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I am Tangerine Racing Group: Members Posts: 7,989 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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If I'm not mistaken, the short shifter kit exacerbates the rubbing issue. The spacer is smaller than the length added to the shift lever, which means the rod still sits lower in the tunnel at the front, compared with the stock shifter. Not only that, the distance that the coupler swings left and right is increased by the short shift increased lever arm.
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| bdstone914 |
May 24 2025, 04:38 PM
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#7
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bdstone914 Group: Members Posts: 4,968 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
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| Montreal914 |
May 24 2025, 06:29 PM
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#8
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Senior Member Group: Members Posts: 1,833 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California
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QUOTE(bdstone914 @ May 24 2025, 03:38 PM)  @bdstone914 I was wondering when you would see it (IMG:style_emoticons/default/laugh.gif) |
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| Literati914 |
May 25 2025, 11:42 AM
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#9
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Senior Member Group: Members Posts: 1,943 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region |
Tail shift transmissions being replaced with side shiFFter transmissions are a common thing - never heard of any tunnel interference (IMG:style_emoticons/default/idea.gif) . Is this issue only because a short shifter kit is installed? Anyone experiencing this without the kit?
Mine (a '72 w/ side shift) takes a little more effort to get into 1/R than I remember but I was thinking it's because every shift bushing has been replaced. Think I'll see if sliding the top plate over slightly, as suggested, will improve it. |
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| gandalf_025 |
May 26 2025, 04:20 PM
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#10
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Senior Member Group: Members Posts: 1,494 Joined: 25-June 09 From: North Shore, Massachusetts Member No.: 10,509 Region Association: North East States |
Many years ago I put a 1965, 911 engine in my 6…
Talk about shift rod interference.. I was lucky and the shop I was doing the swap in had a shift rod that was modified by the previous owner.. Here is an original and the modified one..  |
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| worn |
May 26 2025, 07:59 PM
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#11
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Winner of the Utah Twisted Joint Award Group: Members Posts: 3,486 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(gandalf_025 @ May 26 2025, 02:20 PM) Many years ago I put a 1965, 911 engine in my 6… Talk about shift rod interference.. I was lucky and the shop I was doing the swap in had a shift rod that was modified by the previous owner.. Here is an original and the modified one.. Which one is factory? |
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| gandalf_025 |
May 27 2025, 02:42 AM
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#12
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Senior Member Group: Members Posts: 1,494 Joined: 25-June 09 From: North Shore, Massachusetts Member No.: 10,509 Region Association: North East States |
Straight one is the factory one.
The early aluminum engine cases stuck further down than the he later mag cases. |
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| mate914 |
May 27 2025, 06:02 AM
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#13
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Matt Group: Members Posts: 859 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
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QUOTE(mepstein @ May 22 2025, 05:23 PM) Most common problem is a too long seatbelt bolt that interferes with the rod. Yes very true. |
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| zoomCat |
May 31 2025, 10:30 AM
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#14
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Member Group: Members Posts: 200 Joined: 13-August 04 From: Cincinnati, OH Member No.: 2,526 Region Association: None
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Here is some info on what the geometry in the tunnel looks like, and what the side shift conversion looks like. I fixed my issue when the floor pans were off, but that might be a bit extreme.
http://www.914world.com/bbs2/index.php?sho...=373723&hl= |
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