Transmissions and Drivetrain Need help with your trans? Problems with your axle?

1991 manual trans MOUNT

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Old 03-10-2018, 07:44 AM
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Car: Firebird
Engine: 3.1
Transmission: 700r4 /borg warner t5
1991 manual trans MOUNT

hello i need for my 3.1 firebird with a 5 speed manual a transmission mount
cant find one on the internet the v8s use a different one
maybe someone can help me thanks


Old 03-10-2018, 08:20 AM
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Re: 1991 manual trans MOUNT

That's the oddball hydraulic mount.

It would be worth your time to just change it to the standard mount and crossmember from a V8 car. The crossmember is easy enough to find in most pick a part yyards, eBay or the classifieds here on tgo
Old 03-11-2018, 07:40 AM
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Re: 1991 manual trans MOUNT

Originally Posted by //<86TA>\\
That's the oddball hydraulic mount.

It would be worth your time to just change it to the standard mount and crossmember from a V8 car. The crossmember is easy enough to find in most pick a part yyards, eBay or the classifieds here on tgo
Agreed Xs 2. An after market version is also available.

Even if you could locate that particular mount, as I recall, it was crazy expensive.

JamesC
Old 03-11-2018, 08:55 AM
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Car: Firebird
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Transmission: 700r4 /borg warner t5
Re: 1991 manual trans MOUNT

Originally Posted by //<86TA>\\
That's the oddball hydraulic mount.

It would be worth your time to just change it to the standard mount and crossmember from a V8 car. The crossmember is easy enough to find in most pick a part yyards, eBay or the classifieds here on tgo
thank you do you know why the v6 use a different one when the bolt holes of the trans are the same ?
is the v6 with a manual so rare?
thanks
Old 03-11-2018, 10:08 AM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: 1991 manual trans MOUNT

Originally Posted by luca
thank you do you know why the v6 use a different one when the bolt holes of the trans are the same ?
is the v6 with a manual so rare?
thanks
This mount also appeared in v8 cars, no idea how or why it was chosen.
My v6 car had the standard mount, granted it was an automatic stock. I kept the mount when I converted to manual years back


The manual was uncommon in these cars period, most are automatics. The manual in a firebird seems to be more uncommon that in the Camaro from what I've seen too.
Old 03-11-2018, 11:25 AM
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Axle/Gears: Limited Slip 3.23's
Re: 1991 manual trans MOUNT

The following link has info on several different mounts that were used in thirdgens:

https://www.thirdgen.org/forums/hist...ss-member.html

Before choose a mount, check out the following link:

https://www.thirdgen.org/forums/tran...ml#post4649528

Aftermarket review:

https://www.thirdgen.org/forums/afte...-t5-cross.html

JamesC

Last edited by JamesC; 03-11-2018 at 11:30 AM. Reason: Additional info
Old 03-11-2018, 11:53 AM
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Re: 1991 manual trans MOUNT

The Mount-N-of-Power was a solution for NVH. That's Noise Vibration and Harshness if you don't speak the acronym jive. The alternative was to hang a huge steel donkey D on the tail shaft of the transmission to try to eliminate some annoyance predicted by GMs engineers. HAL-9000 predicted you'd be unhappy unless they did something about it, so fancy transmission mount.

In reality, some 30 years later, the minuscule issue that the mount was designed to dampen, is probably less annoying than any number of other current rattles or vibes. Hence we can throw fancy engineering solutions like this into the History bin, and replace them with service replacements.


Old 04-01-2018, 04:18 AM
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Re: 1991 manual trans MOUNT

Originally Posted by Drew
The Mount-N-of-Power was a solution for NVH. That's Noise Vibration and Harshness if you don't speak the acronym jive. The alternative was to hang a huge steel donkey D on the tail shaft of the transmission to try to eliminate some annoyance predicted by GMs engineers. HAL-9000 predicted you'd be unhappy unless they did something about it, so fancy transmission mount.

In reality, some 30 years later, the minuscule issue that the mount was designed to dampen, is probably less annoying than any number of other current rattles or vibes. Hence we can throw fancy engineering solutions like this into the History bin, and replace them with service replacements.


Thank you i replaced it with a standart mount and a v8 crossmember
works fine now
Old 04-01-2018, 04:20 AM
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Re: 1991 manual trans MOUNT

thanks to all for your response
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