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#1 |
Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,335
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Transmission Mount
Has anyone every changed out a tranny mount? The reason I ask is becuase I have a vibration that I cant track down. I have had the following changed out.Torque converter, flexplate, harmonic balancer, & u joints.
Thanks in advance.
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RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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#2 |
Registered User
Join Date: Sep 2005
Location: Roseville, CA
Posts: 152
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Re: Transmission Mount
need to be more specific with the vibration...... Where can you feel it? When can you feel it?, etc.
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Avatar is a pic of "Before"... Just wait.. ---------------- 1969 Fleetside: Shortened frame for SWB, ECE 4-6 drop. ECE SS tank. All new ECE suspension. Rebuilt 12 bolt 3:73 with Eaton Posi. Front and rear disc brakes. Ramjet 350 and 700r-4 trans. 20" Centerline wheels with Kumho 295/45/20 tires (I hope they fit). Progress pics: http://s44.photobucket.com/albums/f2...uck/?start=all ---------------- Seriously... It's nothing a large dose of cash can't fix... Right? After all, I can't take it with me when I go... Just gotta have enough to get there!!! ![]() |
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#3 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Transmission Mount
I change them on all my stuff. Cost is under 10 bucks. Often, they collapse under the weight and allow the trans to settle onto the crossmember.
I have no idea if it's the source of your vibration though.
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I'm on the Instagram- @Gearhead_Kevin |
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#4 |
Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: Transmission Mount
Drive shaft out of balance?
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#5 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
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Re: Transmission Mount
Just found out what my vibration was......a busted left side motor mount....
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1997 GMC Sierra Ext 1965 Mustang |
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#6 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: Transmission Mount
did you make sure your u-joint where settles in the driver shaft right? when i did mine i didn't get the going to the rear end right and had one of the wrost virabtions i felt
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#7 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
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Re: Transmission Mount
I just replaced mine and can't wait to see what it feels like
![]() I got this one from Energy Suspension: http://store.summitracing.com/partde...0&autoview=sku It fits all GM models with AT (and some newer MT's) for most GM cars and trucks from 1960 to today.
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If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. |
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#8 |
Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,335
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Re: Transmission Mount
Vibration can be felt in the steering wheel from 1100-1400 rpms. At 1500 it magically dissapears. Also this vibration can be felt with the truck sitting still and in park.
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RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Transmission Mount
The your tranny mount isn't going to help at all. your problem is in the engine, and maybe in the tranny.
Jack up the truck, and unbolt the 3 bolts to the torque converter, and slide the converter towards the rear, away from the flex plate. Fire up the engine and rev it to those engine speeds, if the vibes are still there, it's in the engine, if it goes away, it's in the tranny. Shifty, that is a killer tranny mount. I had one on my last truck and let it go with it when i sold it. ![]() If you've ever seen adisplay of that cut in 1/2, you'll see it won't seperate in two if the rubber (poly) ever falls apart. The one draw back on that mount is that it is a bit taller tha stock. Not an issue in most aplications, but I know I was unable to use it in my Caddy/TH350 aplication. My tranny is only about an 1/8 inch from the pinch weld on the tranny tunnle on the frame. A high hump would help, but I think cab mounts would probably do the trick in my situation. |
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#10 |
Registered User
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,335
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Re: Transmission Mount
I checked the tranny mount and its new. Must have been swapped out when I had the 400 turbo rebuilt. Well looks like its time to remove tranny from engine and fire it up. So how do I do that?
Thanks
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RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 |
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#11 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Transmission Mount
Jack up the truck, and unbolt the 3 bolts to the torque converter, and slide the converter towards the rear, away from the flex plate. Fire up the engine and rev it to those engine speeds, if the vibes are still there, it's in the engine, if it goes away, it's in the tranny.
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#12 |
English Chevy Owner
Join Date: May 2002
Location: Shropshire, UK/ Lot, France
Posts: 1,848
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Re: Transmission Mount
I found the energy suspension poly tranny mount transmitted so much driveline noise and vibration into the cab I went back to a stock (but new) rubber one and the noise went away.
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Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission |
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#13 | ||
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,376
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Re: Transmission Mount
Quote:
I gotta decide what to do about the old pinch weld and the body filler that popped out in the process. Quote:
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If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM. Last edited by shifty; 01-10-2006 at 12:27 PM. |
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#14 | |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Re: Transmission Mount
Quote:
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#15 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: Transmission Mount
I also have the Poly tranny mount. They are awesome combined with the poly motor mounts the driveling is direct and has mabye 1/64" of twist under acceleration.
And no stupid vibirations. What type of Fan do you have on you motor ? I have had a fan go out of balance on me and cause a vibiration.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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