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> What Motor and Transmission mounts to use, What motor and transmission mounts to use
Ken Mikos
post Oct 28 2018, 07:32 PM
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Replacing motor and transmission mounts in a original 1973 1.7. Any suggestion on the type and where to purchase? Thanks,

Ken
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Dave_Darling
post Oct 28 2018, 08:22 PM
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The 73 uses solid outboard mounts between the bar and the chassis, and rubber mounts between the bar and the engine. For a street car, I don't think solid replacements for those rubber ones are worth it. Stock works fine.

The 914 transmission mounts are the same as the early 914 front mounts and very similar to many 911 motor mounts. You can use the stock mounts, or go a bit stiffer with the "sport mount" (stiffer 911 Cabriolet motor mounts, I think?) or go with semi-solid Wevo or even full solid. I do not recommend full solid for a street 914. The stiffer ones can help keep the trans from moving around while you accelerate and brake, possibly making for fewer shifting problems.

All the usual sources carry them. Pelican, GPR, AA, probably 914rubber, Camp914, 914LTD, and so on.

--DD
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914Sixer
post Oct 29 2018, 07:46 AM
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Buy stock and be done.
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UROpartsman
post Oct 29 2018, 10:51 AM
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For a '73-'76, engine mount 039 199 231 is common and available from many sources.

There are two transmission mount choices:
914 375 025 00 is the 4-cyl mount and has some voids in the rubber to allow some movement. This is also the engine mount for '70-'72.
914 375 026 00 is the 6-cyl mount and is solid rubber. This mount is considered a stiffer "sport" version when used on 4-cyl cars.

Note regarding use of modified 911 engine mounts as 914 transmission mounts:
When modified to be used as 914 transmission mounts, 911 engine mounts require the mounting holes in the ears to be filed into an oval shape or re-drilled, do not have the proper anti-rotation pins on the center sleeve, are close but not quite the same thickness, are not the original stiffness (the engine mounts are stiffer), and do not have the same appearance as original 914 transmission mounts, which can be an aesthetic issue in a fully-restored vehicle. However, modified 911 engine mounts were certainly a functional substitute until proper 914 transmission mounts were finally made available again from URO and Porsche OEM. (Edited for clarity 11/1/18.)


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DRPHIL914
post Oct 29 2018, 11:00 AM
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For transmission most of us have been using the 911 motor mounts they work very well. I ordered OEM 914 motor mount for the engine bar to motor mount this time, I also had the metal solid ones but was told here by members those were way too hard and transmitted a lot of vibration for regular road use.
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troth
post Oct 29 2018, 11:01 AM
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Very happy with my wevo semi-solid trans mounts. Keeps everything aligned a lot better than the 40 year old mounts I had in the car before. Allows for more aggressive upshifting. Maybe just placebo, but I think they were worth the extra money.
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DRPHIL914
post Oct 29 2018, 11:02 AM
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here is a picture of a 911 motor mount used on the 914 transmission and stock washers


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DRPHIL914
post Oct 29 2018, 11:08 AM
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stock motor mount


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DRPHIL914
post Oct 29 2018, 11:24 AM
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QUOTE(troth @ Oct 29 2018, 01:01 PM) *

Very happy with my wevo semi-solid trans mounts. Keeps everything aligned a lot better than the 40 year old mounts I had in the car before. Allows for more aggressive upshifting. Maybe just placebo, but I think they were worth the extra money.


I looked at these but when I was putting my motor back together and ready to go I could not find them, they were out of stock everywhere. Are the WEVO still being made?
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troth
post Oct 29 2018, 12:08 PM
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QUOTE(DRPHIL914 @ Oct 29 2018, 01:24 PM) *

QUOTE(troth @ Oct 29 2018, 01:01 PM) *

Very happy with my wevo semi-solid trans mounts. Keeps everything aligned a lot better than the 40 year old mounts I had in the car before. Allows for more aggressive upshifting. Maybe just placebo, but I think they were worth the extra money.


I looked at these but when I was putting my motor back together and ready to go I could not find them, they were out of stock everywhere. Are the WEVO still being made?


I got mine from tarret engineering earlier this summer. They were out of stock everywhere else I looked at that time. Wevo told me they had a batch on order at the time. They probably have them back in stock by now.
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Ken Mikos
post Oct 29 2018, 02:52 PM
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Thanks for all the follow up. You guys are a great resource.
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GregAmy
post Oct 31 2018, 06:44 AM
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What's the right combo for a '74 track-only car? Not concerned about NVH.
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pete000
post Oct 31 2018, 10:00 AM
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I have been running the Wevo blue Trans mounts for years with great luck.
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Dave_Darling
post Oct 31 2018, 12:05 PM
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For a track-only car? Solid all the way around. Keeps the drivetrain more positively located.

May cause loosening issues with some fasteners on the engine; I seem to recall some kind of issue with Webers being blamed on solid mounts?

--DD
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GregAmy
post Oct 31 2018, 12:18 PM
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"Solid" as in aluminum-solid? I don't think that's a good idea...in addition to the loosening of fasteners I'd be worried about sloshing fuel in the carb bowls.

Or do you mean the most-solid rubber isolators?
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Literati914
post Oct 31 2018, 06:09 PM
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QUOTE(UROpartsman @ Oct 29 2018, 11:51 AM) *


*Modified 911 mounts do not have the proper anti-rotation pins on the center sleeve, .. not quite the correct thickness, are not the correct stiffness, do not have an original appearance, and require the mounting holes in the ears to be re-drilled. However, modified 911 mounts were a functional substitute until the correct 914 mounts were finally available again.


So, are you saying that either of the engine mounts that you posted above, could be used for the 914 Transmission? and that they are better options than the 911 motor mount, one (like DRPHIL914 posted a picture of above)?

QUOTE(DRPHIL914 @ Oct 29 2018, 12:02 PM) *

here is a picture of a 911 motor mount used on the 914 transmission and stock washers


..and DRPHIL914, did you have to make the multiple modification outlined by UROpartsman to this particular 911 ENGINE mount (that you've used at the 914 transmission)?

Is there a 911 mount that works at the transmission (of 914) that does not need modifications. Or is the 914/6 motor mount a better option for tranmission mounts. Sorry but I'm obviously confused. (IMG:style_emoticons/default/headbang.gif)
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GeorgeRud
post Oct 31 2018, 06:39 PM
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I think either the 914-6, 911, or WEVO mounts will work great for you. I f8nd that minimizing deflection at the transmission mounts does seem to help with shifting.
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Literati914
post Oct 31 2018, 07:49 PM
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QUOTE(GeorgeRud @ Oct 31 2018, 07:39 PM) *

I think either the 914-6, 911, or WEVO mounts will work great for you. I f8nd that minimizing deflection at the transmission mounts does seem to help with shifting.


Ok good, but they'll need to be modified or not (IMG:style_emoticons/default/confused24.gif)
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mepstein
post Oct 31 2018, 07:52 PM
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QUOTE(Literati914 @ Oct 31 2018, 09:49 PM) *

QUOTE(GeorgeRud @ Oct 31 2018, 07:39 PM) *

I think either the 914-6, 911, or WEVO mounts will work great for you. I f8nd that minimizing deflection at the transmission mounts does seem to help with shifting.


Ok good, but they'll need to be modified or not (IMG:style_emoticons/default/confused24.gif)

The 911 mounts sometimes need the mounting holes ovalized a bit. No more than 5 minutes mounted in a vise with a round file. No big deal.
I would get the hardest rubber Wevo mounts for a track car. Listed on the Wevo website.
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DRPHIL914
post Oct 31 2018, 08:03 PM
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QUOTE(Literati914 @ Oct 31 2018, 09:49 PM) *

QUOTE(GeorgeRud @ Oct 31 2018, 07:39 PM) *

I think either the 914-6, 911, or WEVO mounts will work great for you. I f8nd that minimizing deflection at the transmission mounts does seem to help with shifting.


Ok good, but they'll need to be modified or not (IMG:style_emoticons/default/confused24.gif)


When i purchased my 911 mounts they were the only option , but the only modification made was slightly enlarge the holes in the ear of the mounts easy peasy and you can see from my pictures after 6/7 years they look and work like new, still nice and tight, no extra movement, very tight.
Back then URO had not stepped up and made a solid reproduction of the original mount.

The 911 mounts will work just fine, but i would not heaitate to test out that 914/6 reproductuon from URO. Drew will stand behind the product i am sure if its not up to your satisfaction
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