Georgia Fiero Club Forum

All Things Fiero => Tech Tips, Tech Questions => Topic started by: TopNotch on August 18, 2018, 03:37:28 pm

Title: Separated Transmission Mount
Post by: TopNotch on August 18, 2018, 03:37:28 pm: Is it possible to repair a separated transmission mount? If so, how?
I ask, because this is the front mount out of my yellow car, and the one I got from the Fiero Store is the wrong part.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 18, 2018, 03:42:50 pm: You got this (https://www.fierostore.com/Product/Detail.aspx?s=52913) one? If so, it looks identical to yours.
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 18, 2018, 03:48:39 pm: Actually, the one in that picture doen't look a thing like mine. If you look closely, you'll notice a mounting nut soldered at one place on it, and the mounting points are not on the same plane.
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 18, 2018, 03:53:14 pm: Actually, this one (https://www.fierostore.com/Product/Detail.aspx?s=52910&d=313&p=1) looks like mine. I wonder how my car ended up with a V6 transmission mount? And for that matter, why would they be different?
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 18, 2018, 03:56:52 pm: You would be better able to tell than I. I don't remember if you have the stock transmission or not.

Anyway, if you got that part, you may be able to re-use the rubber portion of the TFS mount on your mount. You'd have to detatch both rubber pieces, then re-glue the new rubber piece to the old mount with windshield adhesive or something similar.

On my Fiero, we started with the 4T60 stock mount and the TH125C mount, and made one mount out of them, and it works well.

Keep in mind that I know nothing about 4-cylinder anything on Fieros.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 18, 2018, 03:58:13 pm: No, the question is how did you get a transmission meant for an earlier year Fiero?
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 18, 2018, 03:59:57 pm: I have a stock Isuzu transmission, normally found in 88 dukes. Granted, it's the 2nd transmission for that car, but it's identical to the first.
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 18, 2018, 04:01:42 pm: If gluing a transmision mount is OK, I might as well repair the original, But I'd think you'd have to use some kind of epoxy. Air can't get to the glue once the parts are assembled, so an air-dry glue would never dry.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 18, 2018, 04:02:58 pm: That mount is for '85-'88 V6 Fieros, and for '84-'87 4cyl standard transmissions. Either way, perhaps the V6 mount would be the solution for which you seek. I don't have my old mount (threw them all away for some reason).
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 18, 2018, 04:10:31 pm: They are all glued; you just have to find a glue that will bond with the rubber and adhere to the metal. It came in a tube, and looked like windshield glue. We had to completely remove all the old glue from both surfaces. The metal was flat, but I had to get the rubber surface completely flat. There was about a 6-hour dry time, and we let it cure for 2 days (meaning we didn't have time to work on it).
Title: Re: Separated Transmission Mount
Post by: Raydar on August 18, 2018, 04:27:53 pm: I was under the impression that all the front (and rear) manual trans mounts were the same.
I thought they were all the same, except for the goofy uni-mount that some of the automatic Dukes use.
I've never looked that closely at my Duke mount, however.
Title: Re: Separated Transmission Mount
Post by: Fierofool on August 18, 2018, 07:32:14 pm: I don't think you'd be able to glue it back together. When things like that are made, the rubber is cast to the metal. It's vulcanized to it. My partner and I used to cast urethane rollers for CT and MRI beds. They had an axle in them. Pressing the axle into the cast roller would allow the roller to walk to one side of the axle. Once we started casting the roller to the axle, the problem went away. They were bonded together in the casting and curing process.
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 19, 2018, 02:11:36 pm: I checked Rock Auto, and they picture the mount I have for an 88 Fiero like mine, so I ordered one. And for now, I cleaned off the surfaces of my broken one, put weatherstrip adhesive on it, and baked it in a 250-degree oven for a while. Then I put it back on the car.
On an 88, you have to loosen the parking brake cable to get to the nuts for this mount, because the cable goes through the front cradle cross-member (not like previous years, where the cable goes trough the rear cross member). So I'll leave the cable loose for now, to make putting the new one in easier.
Title: Re: Separated Transmission Mount
Post by: Raydar on August 19, 2018, 03:49:45 pm: Quote from: TopNotch on August 19, 2018, 02:11:36 pm
...
On an 88, you have to loosen the parking brake cable to get to the nuts for this mount, because the cable goes through the front cradle cross-member (not like previous years, where the cable goes trough the rear cross member).

Thanks for that reminder. I had forgotten about the parking brake cables. I was just about to go downstairs and start replacing my broken mount.
Title: Re: Separated Transmission Mount
Post by: TopNotch on August 19, 2018, 06:15:22 pm: I have several rear transmission mounts if you need one. Fits all years except uni-mount dukes. (And fits those with a little modification.)
Title: Re: Separated Transmission Mount
Post by: Raydar on August 19, 2018, 10:06:11 pm: Thank you. Much appreciated. But I just installed Rodney's mounts. (4.9 car.) They're quite nice, and sturdy as hell.
Now I get to try to fix all the other sh!t that I broke, in addition to my separated mount.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on August 23, 2018, 07:00:15 pm: So, what happened?
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on December 19, 2018, 12:06:02 am: Did you ever install the RA mount, or are you still driving with the repaired mount?
Title: Re: Separated Transmission Mount
Post by: TopNotch on December 19, 2018, 07:58:04 am: In my case, new mount installed.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on December 19, 2018, 08:03:50 am: When you installed the new mount, had the repaired mount separated?
Title: Re: Separated Transmission Mount
Post by: TopNotch on December 19, 2018, 10:00:15 am: Quote from: GTRS Fiero on December 19, 2018, 08:03:50 am
When you installed the new mount, had the repaired mount separated?

Yes. Not a good idea after all.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on December 19, 2018, 05:56:01 pm: Well, you gave it your best effort. Now we know.
Title: Re: Separated Transmission Mount
Post by: Fierofool on September 30, 2019, 11:16:06 pm: Pat, do you still have those transmission mounts?
Title: Re: Separated Transmission Mount
Post by: TopNotch on October 01, 2019, 08:11:20 am: I don't know if I have the separated one, but I have some mounts.
Title: Re: Separated Transmission Mount
Post by: Fierofool on October 01, 2019, 08:44:44 pm: LOL, I have separated ones. I need good ones.
Title: Re: Separated Transmission Mount
Post by: GTRS Fiero on October 01, 2019, 08:57:57 pm: I should've saved my old mounts.