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 FAQ: Engine/Transmission Motor Mounts

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RivieraTim
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Engine Mounts Dry-Rotted?   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyWed Aug 24, 2011 3:05 pm

I am new to this forum but starting to feel at home here. I have a very low-mileage '97 Riviera (non-supercharged) that I just purchased a few weeks ago. The car had been garage-kept all these years but things did dry-rot. In driving the car around the last few days have become more aware of some engine vibration through the steering wheel and brake pedal at idle and especially when in drive, sitting at a stop light. It would seem to me that the amount of vibration that I feel would have been unacceptable to anyone that would have bought the car new and have had it vibrate as much as mine. My thought is that the engine mounts may be dry-rotted. Any thoughts?
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AA
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyWed Aug 24, 2011 3:12 pm

There's a chance the rubber mounts are cracked, causing metal/metal contact and the vibration you are experiencing. Take a read through this thread for input from various members on the topic. Links to write-ups for repair are at top of page 1.

For an absolute diagnosis, have a trained mechanic put the car up on a lift and apply pressure to the engine/trans with a pry bar. Based on the amount of visible movement, they can determine which mounts are bad. Metal/metal contact can be seen under the car. Typically front & rear mounts are the ones for concern. Front mounts are easy to replace, rear is not so easy. Good luck.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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RivieraTim
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyWed Aug 24, 2011 3:45 pm

AA wrote:
There's a chance the rubber mounts are cracked, causing metal/metal contact and the vibration you are experiencing. Take a read through this thread for input from various members on the topic. Links to write-ups for repair are at top of page 1.

For an absolute diagnosis, have a trained mechanic put the car up on a lift and apply pressure to the engine/trans with a pry bar. Based on the amount of visible movement, they can determine which mounts are bad. Metal/metal contact can be seen under the car. Typically front & rear mounts are the ones for concern. Front mounts are easy to replace, rear is not so easy. Good luck.

Thanks for pointing me in the right direction, Aaron...I should have known that there would be some discussion about this somewhere. I'll let my mechanic look at it in a few days. (By the way, I do have a great mechanic in my area that was a former Buick service manager back when these cars were new and I could refer him on this site somewhere if there is such a thread. Before the Riviera, I purchased last year a low-mileage '94 Roadmaster Wagon and found this guy and he has been great to work on both cars so far)
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AA
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyWed Aug 24, 2011 4:16 pm


_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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3.8 Riviera
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: A Big Favor Please   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptySat Sep 10, 2011 8:31 pm

Hey you guys. I need a favor from you guys. Could you all send pictures of your engine w/ supercharger, like in detail and close ups. I looked at my engine recently and it looked like it was leaning a little forward on the passenger side. I hope a front mount hasn't failed. This got my attention because I checked the oil level and pulled put the dip stick and it rubbed the front black support/brace. Comments? Pictures?
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albertj
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptySat Sep 10, 2011 11:37 pm

Actually all you have to do is get the car on a lift and look at the mounts, the ones that have failed will be obvious on inspection. Normally the bolt thru the mount is suspended by the rubber. If it is resting on any part of the mount, the mount is wack.



Albertj
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98riv
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Oct 31, 2011 4:06 pm

AA wrote:

Old front mount:
FAQ: Engine/Transmission Motor Mounts - Page 7 IMG_0143

Noticed some more vibration in the steering wheel and the cabin at idle and thought I would check my front mount. It is broken in the same spot as above. I reved the engine in park while watching the mount and it moves pretty good when it is broken! I think I will try to use the window weld and fill the mount. This is the mount that I need correct?

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: temp   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Oct 31, 2011 4:23 pm

Yes that's it. If all you need to do is the front, it's an easy job to do yourself, using a jack to support the engine. With the car securely lifted on jack stands, here's a spot where you can raise/support the engine while swapping the mount. Can do this in 1/2 hour with practice!

FAQ: Engine/Transmission Motor Mounts - Page 7 IMG_2237

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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Karma
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 01, 2011 11:52 am

An FYI: The rear is also actually pretty easy too. No dropping of the cradle needed. Just remove the sway-bar end links so it can swing out of the way. And it wiggles out. I also use a giant extender and impact wrench to get the PS bolts from the top. The rear mount can seem like its really buried in there and hard, but its actually not so bad at all to get in and out.

_________________
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: knocking when putting car in drive and reverse   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 12:57 am

when i first get into my 97 riv and put it in drive i get a thump, almost like a knock . it kinda rocks the car .I also get it when i go into reverse..i have to wait a couple seconds until i feel it Knock/ Rock/ Thump
i dont know if this is the transmission going bad or what
can anybody help me??????
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 3:21 am

......look under the car and see if your rear mount is still connected..... it couldn't hurt to look if it isn't you could end up with the big repair list i have for my GF's riv I think that might be the problem since it happens when you put it in a gear same as whats happening with her car ,

the car rocking could be from the motor shifting forward or backward depending on the gear your putting it in I am in no way a pro on this just sharing what I am going through right now...
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DEMonte1997
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 2:49 pm

^ I agree. Probably a worn or broken motor mount allowing play in the motor. The sound you are hearing could be metal on metal where the mount is broken or where something is hitting due to the excessive travel. Do you also get a bit of vibration at idle? When a lower mount on my Regal failed, the vibration at idle was almost unbearable. I thought the motor was trying to climb through the firewall at me. hahaha frown

edit: There is a thread here showing the PNs for the mounts. Recently some aftermarket ones started popping up, which saves a lot of $$ compared to a GM one.

HTH
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rk0ehn
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 2:56 pm

DEMonte1997 wrote:
I thought the motor was trying to climb through the firewall at me. hahaha frown

laughat

X3 for the motor mounts, check the rear one and front one, as the engine moves forwards when you set the reverse gear and backwards when you set the drive gear.

DEMonte1997 wrote:
Do you also get a bit of vibration at idle? When a lower mount on my Regal failed, the vibration at idle was almost unbearable.

agree



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albertj
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 3:12 pm

please "search" for the thread on motor mounts, you'll find part numbers of the OE and aftermarket (Arrow) parts, pictures of good and worn-out mounts, and such. Your problem is almost certainly the mounts, on these cars they only last 75,000 - 100,000 miles or so.

Albertj
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dboydakid
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Nov 08, 2011 10:48 pm

ok thanks guys i will check for all of this when i get off work tomorrow and get back to you with updates..thanks again
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98riv
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Nov 21, 2011 12:39 pm

I changed the front mount and ended up having to reuse the old bracket with the new bushing. The new bracket wouldn't bolt up to the subframe. The bolt holes wouldn't line up. A little more work, but not to bad. I filled up the mount with window weld and it held up pretty good being pressed into the new mount. A little bit came loose on one end, but I'm not concerned. I gave it a couple weeks to dry.

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Nov 21, 2011 1:18 pm

Great, thanks for letting us know. Any change in the vibration?

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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98riv
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Nov 21, 2011 1:36 pm

AA wrote:
Great, thanks for letting us know. Any change in the vibration?

I haven't driven the car too much after I changed it, but it seems to be a less vibration now that I changed the mount. It seems to shift better and feel less clunky. The old mount had seen better days.

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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2000ws6transam
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: temp   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptySun Jan 08, 2012 6:52 pm

can anyone list all the part # for all the mounts? 3127 is for the drivers front? the rear trans is 3065 seen it on rock for 17.66! i know of the pass side by the S/C but no P/N is there a 4th mount i havent seen yet? and P/N would be great thanks guys! I also did the window weld in the mounts in the car. Let sit for 8 hrs and then let the car idle for an hour to warm them up a bit it was dippin in the 30s. drove the car today very easy i could tell the outside was cured but the inner was soft. hit the mounts with a heat gun and going to milk it for the next couple days hopfully they dont low out
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptySun Jan 08, 2012 9:37 pm

Part numbers can be found throughout this thread, or in our part number listing (See Riv FAQ above).

Our cars have 4 engine/transmission mounts. Here is a diagram showing their locations.

03 - rear
17 - front
11 - left
28 - right

FAQ: Engine/Transmission Motor Mounts - Page 7 1997-98_SC

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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2000ws6transam
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Jan 09, 2012 5:49 pm

by chance you have the part numbers ?
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PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Jan 09, 2012 5:51 pm

Quote :
Part numbers can be found throughout this thread, or in our part number listing (See Riv FAQ above).

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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http://www.cardomain.com/ride/657082/4
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyMon Jan 09, 2012 6:05 pm

2000ws6transam wrote:
by chance you have the part numbers ?

Mount, Engine/Transmission (rear)

GM: 22201115 ('95-98)
GM: 22201116 ('97-98
DEA: A5236 ('95-99)
ANCHOR 3065 ('95-98, insulator only)

Mount, Engine/Transmission (front)

ANCHOR 3127 ('95-99)

Mount, Engine/Transmission (left)

GM: 22174975 ('95-96)
GM: 22178776 ('97-98)
GM: 25695084 ('99)

Mount, Engine/Transmission (right)

GM: 22179245 ('95)

Mount, Shock (rear)

Spicer: 520-1261 (sold ea.)

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
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FAQ: Engine/Transmission Motor Mounts - Page 7 Empty
PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Jan 10, 2012 6:07 pm

thanks looks like no aftermarket for the sides i will have to hit the JY or LKQ
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PostSubject: Re: FAQ: Engine/Transmission Motor Mounts   FAQ: Engine/Transmission Motor Mounts - Page 7 EmptyTue Jan 10, 2012 6:48 pm

2000ws6transam wrote:
thanks looks like no aftermarket for the sides i will have to hit the JY or LKQ

Before you hit the JY look at monsterpartsonline.com - I'm stunned, their prices are down somewhat and they list 'em all. (exc the spicer shock mount)

Albertj
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