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  Mustangsandmore Forum Archive
  '69 to '73 -- The Musclecar Mustang
  Transmission bracket

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Author Topic:   Transmission bracket
Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-18-2006 07:42 PM     Click Here to See the Profile for Harley        Reply w/Quote
In the process of fixing a transmission fluid leak, I noticed that the rubber in my rear transmission bracket has turned goo. (I have a 351 windsor with an FMX)

Where's the best place to purchase a quality bracket (a mechanic friend says to watch out for cheap ones)? And how difficult is it to replace?

Also, could this be why I've had a mysterious vibration at about 60 mph?

Thanks.

[This message has been edited by Harley (edited 11-18-2006).]

PONYMAN
Gearhead

Posts: 421
From: Ardmore, Ok. USA
Registered: Jul 99

posted 11-18-2006 08:23 PM     Click Here to See the Profile for PONYMAN        Reply w/Quote
I am sure NPD has one. If you are looking localy, I have alwayshad good luck with NAPA parts. They are usually higher in price thanO'Reillys and Autozone, but also better quality. Of course I may be prejudiced, since my dad owned one for almost 30 years.

70SportsRoof
Gearhead

Posts: 1064
From: Orange County, CA
Registered: Dec 2001

posted 11-18-2006 10:09 PM     Click Here to See the Profile for 70SportsRoof        Reply w/Quote
Most auto parts store should stock them, or can get one, just ask them for the transmission mount. PONYMAN, you are right, NAPA usually does have better parts.
The vibration could be the mount, or it could also be something such as bad U-Joint. Replace the mount since for sure it need to be done, then try 60 MPH again, if it continues, then it could be the U-Joints.

------------------
Gary M
'70 Mustang 63B SportsRoof
'95 Mustang GT coupe
and 4 other classic Fords

Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-18-2006 11:03 PM     Click Here to See the Profile for Harley        Reply w/Quote
Thanks for the replies. You folks are a godsend for a wannabe mechanic like me.

Is that mount something I can do myself (if so, how) or should I take it to a mechanic?

As for the vibration, I've had everything checked/replaced that I can think of -- u-joints, drive shaft, wheels rebalanced.

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 11-19-2006 08:09 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
It's a very good bet the weak mount could be your vibration.

They are very easy to change. Put a jack lightly under your tailshaft housing with just enough pressure to hold your transmission in place. Remove the nut in the center of the transmission mount, jack the tailshaft housing up a couple inches, remove the bolts on either side of the mount, and swap mount. Reverse to install.

------------------
'70 Mustang Mach 1 - '70 Mustang Convertible - '72 Mustang Sprint - '94 F-150 XL

Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-21-2006 12:10 AM     Click Here to See the Profile for Harley        Reply w/Quote
I've removed the bolts, but I can't raise the tailshaft up enough for the old mount to slide out. Should I drop one end of the crossmember to do that?

rcodenewf
Gearhead

Posts: 151
From: Manitoba, Canada
Registered: Jan 2002

posted 11-21-2006 01:24 AM     Click Here to See the Profile for rcodenewf        Reply w/Quote
Yep, just put a floor jack with a block of wood under the transmission pan and just barely take the load of it. Take the bolts out of the crossmember and lower it down. It's only two bolts. Makes life much easier.

Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-21-2006 11:24 PM     Click Here to See the Profile for Harley        Reply w/Quote
Job done. Thanks to you folks for the advice.

Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-22-2006 06:43 PM     Click Here to See the Profile for Harley        Reply w/Quote
Here's a wrinkle I didn't expect. Started the car this morning and there was an awful clanging from the front of the engine bay.

Upon close inspection, my fan blades were scraping against the bottom of the shroud.

Could it be that the new rear transmission mount is slightly taller and it tilted the nose of engine downward just enough that it forced the fan into the shroud? We're talking a fraction of an inch, but there was very little clearance inside the shroud to begin with.

I re-adjsuted the shroud and it seems OK, but should I be worried about something else?

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 11-22-2006 06:52 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Naw, the adjustment should take car of it.

Bet it got your attention, though...

------------------
'70 Mustang Mach 1 - '70 Mustang Convertible - '72 Mustang Sprint - '94 F-150 XL

Harley
Gearhead

Posts: 204
From:
Registered: Jul 99

posted 11-22-2006 07:15 PM     Click Here to See the Profile for Harley        Reply w/Quote
Scared me to death. Sounded like marbles clanging around under the hood.

Just so I understand what's going on, do you think the new mount did change the engine angle ever so slightly, and that pushed the fan into the shroud?

[This message has been edited by Harley (edited 11-22-2006).]

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 11-22-2006 07:37 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Yes, that's what it sounds like. It's probably a hair taller which moved the fan down into the shroud. The shroud was probably very close to the fan beforehand.

------------------
'70 Mustang Mach 1 - '70 Mustang Convertible - '72 Mustang Sprint - '94 F-150 XL

68 S-code GT
Gearhead

Posts: 3835
From: Sayreville, NJ, US
Registered: Mar 2000

posted 11-28-2006 08:11 AM     Click Here to See the Profile for 68 S-code GT        Reply w/Quote
Or the old mount was slightly compressed and the fan shroud was installed and adjusted for that angle.

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