914/911 Speedo angle gear interchangability, They look identical. Are they interchangeable? |
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914/911 Speedo angle gear interchangability, They look identical. Are they interchangeable? |
porsche914_73 |
Jul 26 2018, 06:40 PM
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#1
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Fred Larracuente Group: Members Posts: 12 Joined: 4-November 06 From: Guaynabo, Puerto Rico USA Member No.: 7,149 Region Association: South East States |
Hi Guys!
I have a chance to get my hands on a speedo angle gear PN 91131802900 at a very good price. Is it compatible with 914 speedo gear PN 91431802901? Estetically, they look identical. Maybe it has different or reverse gearing? Any thoughts? |
ClayPerrine |
Jul 26 2018, 07:19 PM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,443 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Hi Guys! I have a chance to get my hands on a speedo angle gear PN 91131802900 at a very good price. Is it compatible with 914 speedo gear PN 91431802901? Estetically, they look identical. Maybe it has different or reverse gearing? Any thoughts? The 911 angle drive turns the opposite direction from the 914 angle drive. BTDT. |
914Sixer |
Jul 26 2018, 07:21 PM
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#3
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914 Guru Group: Members Posts: 8,878 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Something is different but I do not remember. Maybe the good Dr Evil will chime in
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porsche914_73 |
Jul 26 2018, 07:36 PM
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#4
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Fred Larracuente Group: Members Posts: 12 Joined: 4-November 06 From: Guaynabo, Puerto Rico USA Member No.: 7,149 Region Association: South East States |
Hi Guys! I have a chance to get my hands on a speedo angle gear PN 91131802900 at a very good price. Is it compatible with 914 speedo gear PN 91431802901? Estetically, they look identical. Maybe it has different or reverse gearing? Any thoughts? The 911 angle drive turns the opposite direction from the 914 angle drive. BTDT. I imagined that much. Too bad. Also, there's an original speedo angle gear but has PN 90131802901. Is this for the 901 transmission therefore I assume compatible wiht a 914-4. Am I correct? |
bdstone914 |
Jul 27 2018, 07:21 AM
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#5
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bdstone914 Group: Members Posts: 4,517 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Hi Guys! I have a chance to get my hands on a speedo angle gear PN 91131802900 at a very good price. Is it compatible with 914 speedo gear PN 91431802901? Estetically, they look identical. Maybe it has different or reverse gearing? Any thoughts? The 911 angle drive turns the opposite direction from the 914 angle drive. BTDT. I imagined that much. Too bad. Also, there's an original speedo angle gear but has PN 90131802901. Is this for the 901 transmission therefore I assume compatible wiht a 914-4. Am I correct? Only a 914 one will work. 914 318 029 01 911 318 029 00 is for 911's. Your car will go backwards if you use the 911 angle drive. (IMG:style_emoticons/default/av-943.gif) Actually it will break the speedo. |
morgan_harwell |
Jul 27 2018, 07:51 AM
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#6
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Ha! Finally snuck up on a camera! Group: Members Posts: 126 Joined: 28-January 03 From: Santa Cruz Mtns., Ca. Member No.: 203 Region Association: Northern California |
The 911 angle drive turns the opposite direction from the 914 angle drive. BTDT. Install the 911 angle drive, then you will have a Benjamin Button 914 (IMG:style_emoticons/default/biggrin.gif) |
Mark Henry |
Jul 27 2018, 07:53 AM
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#7
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Hi Guys! I have a chance to get my hands on a speedo angle gear PN 91131802900 at a very good price. Is it compatible with 914 speedo gear PN 91431802901? Estetically, they look identical. Maybe it has different or reverse gearing? Any thoughts? The 911 angle drive turns the opposite direction from the 914 angle drive. BTDT. I imagined that much. Too bad. Also, there's an original speedo angle gear but has PN 90131802901. Is this for the 901 transmission therefore I assume compatible wiht a 914-4. Am I correct? Only a 914 one will work. 914 318 029 01 911 318 029 00 is for 911's. Your car will go backwards if you use the 911 angle drive. (IMG:style_emoticons/default/av-943.gif) Actually it will break the speedo. I don't know if it would break the speedo, the needle isn't mechanically connected to the drive, it runs on magnets. My bug's 90mph speedo I've had 360* around and pinned back at 0 without issue. My bug has a 901-911 transmission , 914 gearing, and a 180hp t4 conversion, scary at that speed but BTDT. Of course this is moot, it won't work, unless you want to know how fast you're going in reverse. |
johnhora |
Jul 27 2018, 12:25 PM
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#8
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
there are some differences...even in the early 914 and later 914 ones...
they both turn either way so no problem with which way your engine is facing. what's different is the size of the gear "head" ...where the teeth are... I'll see if I have some pictures.... |
johnhora |
Jul 27 2018, 01:18 PM
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#9
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
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johnhora |
Jul 27 2018, 01:20 PM
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#10
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
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ClayPerrine |
Jul 27 2018, 01:26 PM
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#11
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Life's been good to me so far..... Group: Admin Posts: 15,443 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
there are some differences...even in the early 914 and later 914 ones... they both turn either way so no problem with which way your engine is facing. what's different is the size of the gear "head" ...where the teeth are... I'll see if I have some pictures.... The only angle drive listed for the 914 is 914-318-029-01. There was never a different angle drive for 914s. The 911 uses 911-318-029-00. If you look at the tail cone from a 911, you will see that the speedo drive connects to the input shaft on the top. The 914 speedo drive connects to the input shaft on the bottom. That makes them spin in opposite directions, and that accounts for the difference in the angle drives. |
johnhora |
Jul 27 2018, 01:57 PM
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#12
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Senior Member Group: Members Posts: 866 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
Clay...check the part numbers again on the pics....there is a 914-318-029-00 part number
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ClayPerrine |
Jul 27 2018, 09:16 PM
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#13
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Life's been good to me so far..... Group: Admin Posts: 15,443 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
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porsche914_73 |
Jul 27 2018, 09:49 PM
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#14
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Fred Larracuente Group: Members Posts: 12 Joined: 4-November 06 From: Guaynabo, Puerto Rico USA Member No.: 7,149 Region Association: South East States |
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porschetub |
Jul 28 2018, 02:01 AM
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#15
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
I think if you change just the angle part it would work...all of these show a 1:1 ratio. some pictures for your viewing....and adds more to the fun Wow the info on here is amazing,remember testing my new to me metric speedo...didn't work till I turned it the right way with a drill (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) . Not like the correct drive is that expensive ,shop around ,even a used one with new seals will be fine. |
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