 trans cover, is it on yet? |
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| doobie123 |
 Nov 28 2022, 12:51 PM
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#1
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Member  Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region  |
hi, working on a 1975 914 1,8 5spd.
so; i'm replacing the rear cover for the transmission. its the cover that the speedo drive is located in. i have it on but, i can't seem to get it to go on all the way. it is setting about 1/8" from seating all thew. i don't want to tighten the nuts until i can find out if this is normal or is there something i've missed or have out of alingment. any suggestions would be great! thanks. ive enclosed a pic  |
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Replies(1 - 13)
| mepstein |
Nov 28 2022, 12:57 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,876 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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Nope. It has to completely close the gap. There's a piece or two inside the tail cone that can slip off and keep the piece from seating.
It will assemble without force or using the hardware to close the gap - or at least it should. |
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| doobie123 |
Dec 2 2022, 11:37 AM
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#3
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Member Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region |
QUOTE(mepstein @ Nov 28 2022, 01:57 PM)  Nope. It has to completely close the gap. There's a piece or two inside the tail cone that can slip off and keep the piece from seating. It will assemble without force or using the hardware to close the gap - or at least it should. heres a maybe obvious question, should the speedo drive be installed before or after the cover is on? |
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| porschetub |
Dec 2 2022, 08:06 PM
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#4
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Advanced Member Group: Members Posts: 4,816 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(doobie123 @ Dec 3 2022, 05:37 AM) QUOTE(mepstein @ Nov 28 2022, 01:57 PM) Nope. It has to completely close the gap. There's a piece or two inside the tail cone that can slip off and keep the piece from seating. It will assemble without force or using the hardware to close the gap - or at least it should. heres a maybe obvious question, should the speedo drive be installed before or after the cover is on? Fit the drive after the cover is on and seated ,cheers. |
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| rbzymek |
Dec 2 2022, 08:41 PM
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#5
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Member Group: Members Posts: 199 Joined: 5-April 19 From: Northville, MI Member No.: 23,013 Region Association: Upper MidWest
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The reverse gear set (the loose bits) has a spacer at the bottom that has a moon shape cut that allows it to fully seat. If it is not properly on place it will not allow the gear set to fully seat. Pop the cover and remove the reverse bits to make sure it is seated correctly. The spacer is about as thick as the gap you are experiencing.
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| doobie123 |
Dec 3 2022, 09:53 AM
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#6
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Member Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region |
QUOTE(rbzymek @ Dec 2 2022, 09:41 PM) The reverse gear set (the loose bits) has a spacer at the bottom that has a moon shape cut that allows it to fully seat. If it is not properly on place it will not allow the gear set to fully seat. Pop the cover and remove the reverse bits to make sure it is seated correctly. The spacer is about as thick as the gap you are experiencing. /Users/ginger/Desktop/IMG-2679.jpg ok i have the drive on and that must be the issue. i have the spacer with the "moon" cut in place and the spacer and bearing races on the reverse shaft but in spite of my bag and tag process, these wound up on the bench. can anyone I.D. them?  |
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| doobie123 |
Dec 3 2022, 01:28 PM
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#7
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Member Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region |
QUOTE(doobie123 @ Dec 3 2022, 10:53 AM) QUOTE(rbzymek @ Dec 2 2022, 09:41 PM) The reverse gear set (the loose bits) has a spacer at the bottom that has a moon shape cut that allows it to fully seat. If it is not properly on place it will not allow the gear set to fully seat. Pop the cover and remove the reverse bits to make sure it is seated correctly. The spacer is about as thick as the gap you are experiencing. /Users/ginger/Desktop/IMG-2679.jpg ok i have the drive on and that must be the issue. i have the spacer with the "moon" cut in place and the spacer and bearing races on the reverse shaft but in spite of my bag and tag process, these wound up on the bench. can anyone I.D. them? ok so i attached a pic of the position of the cut spacer. i also attached a pic of the inside of the cover and the trans gears. in the center of the cover there looks to be a bushing. the speedo gear coming out of the trans appears to be hitting that bush. on the old cover, that piece has worn away and i can not see what was there. it looks like, if that bushing was gone, it would work. can i remove that and not use it? it must be there for a reason. the numbers on the old and replacement case are the same. any help would be great! thanks  |
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| doobie123 |
Dec 3 2022, 01:29 PM
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#8
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Member Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region |
QUOTE(doobie123 @ Dec 3 2022, 02:28 PM) QUOTE(doobie123 @ Dec 3 2022, 10:53 AM) QUOTE(rbzymek @ Dec 2 2022, 09:41 PM) The reverse gear set (the loose bits) has a spacer at the bottom that has a moon shape cut that allows it to fully seat. If it is not properly on place it will not allow the gear set to fully seat. Pop the cover and remove the reverse bits to make sure it is seated correctly. The spacer is about as thick as the gap you are experiencing. /Users/ginger/Desktop/IMG-2679.jpg ok i have the drive on and that must be the issue. i have the spacer with the "moon" cut in place and the spacer and bearing races on the reverse shaft but in spite of my bag and tag process, these wound up on the bench. can anyone I.D. them? ok so i attached a pic of the position of the cut spacer. i also attached a pic of the inside of the cover and the trans gears. in the center of the cover there looks to be a bushing. the speedo gear coming out of the trans appears to be hitting that bush. on the old cover, that piece has worn away and i can not see what was there. it looks like, if that bushing was gone, it would work. can i remove that and not use it? it must be there for a reason. the numbers on the old and replacement case are the same. any help would be great! thanks forgot to add this one  |
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| r_towle |
Dec 4 2022, 05:22 AM
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#9
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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I might suggest a dry fit with no gasket.
It should be flush when setting it on. Look for debris in captured hole the pins fit into. Ensure the pins fit easily in the holes. Then place gasket over pins to ensure gasket is the correct shape. Rich |
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| doobie123 |
Dec 5 2022, 09:49 AM
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#10
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Member Group: Members Posts: 86 Joined: 8-July 22 From: tucson Member No.: 26,683 Region Association: Southwest Region |
thanks for all the comments so far.
here is what i've found. after pulling the speedo drive i have the same problem. so i took a bore scope and had a look and i've attached a pic. the rod coming out of the trans that has the speedo gear on it, is hitting the case. i think the old case had the same problem and thats why it wore a hole in the case. so my questions are, is there a different case? or can i change the rod to a smaller one? is it possible to cut the rod or remove some material from the case? is there something else going on with the trans? thanks  |
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| ejm |
Dec 5 2022, 12:06 PM
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#11
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I can see the light at the end of the tunnel Group: Members Posts: 2,707 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
Looks like the bushing from the old cover is stuck on the end of the gear.
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| mb911 |
Dec 5 2022, 12:43 PM
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#12
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914 Guru Group: Members Posts: 7,560 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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The RTV pictured is frowned upon. The gasket helps to set pinion depth.
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| Dave_Darling |
Dec 6 2022, 04:20 AM
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#13
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The pinion depth is set by the gaskets between the intermediate plate and the transmission cause, not between the intermediate plate and the end cover.
--DD |
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| brant |
Dec 6 2022, 10:54 AM
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#14
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914 Wizard Group: Members Posts: 11,949 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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was the old cover with the hole in it... caused by the speedo gear backing out?
thats from the large nut holding the gear stack coming loose and allowing the stack to move forward and back... eventually drives a hole through the rear case. when mine did that... I did not reuse the speedo drive, as it was pretty damaged from boring through the case. |
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