Energy Suspension Mount and Bushings
Dec 25, 2010 | 06:12 PM
#11
Thread Starter
TECH Enthusiast
Joined: Jan 2010
Posts: 510
Likes: 1
From: Huntington Beach, CA
The ES catalog does not have a specific listing for the GMT900. I listed the part numbers that worked. I found the quality to be top notch. Much better than the soft factory rubber.
Dec 25, 2010 | 06:28 PM
#12
GFYS and STFU
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Joined: Jan 2007
Posts: 13,870
Likes: 4
From: Here and sometimes there too.
...I then moved back to the tranny mount and went to put the studs back in annnnndddd... 
At that point I was like wtf!?!
So I called energy suspension and said hey, I got your tranny mount and it's not lining up with the crossmember. Now this person was a DICK!!! (I think his boyfriend didn't finish him off last night or something) We actually had words!! 
I explained to him that the stock mount had an offset pattern in order to properly aligned the tailshaft mounting holes to the crossmember and that their mount did not...
He said he was well aware of this and that I didn't need to explain it to him. I was like what's that supposed to mean? He then asked what kinda of vehicle I had and told him it was an 01 silverado and I got part number so and so which was specifically for GM 2WD trucks. He then explained to me that it doesn't fit LS engine trucks and proceeds to tell me that I should of known that before buying it. I asked him how I'm supposed to know that a product that is sold for GM 2WD truck is not supposed to fit my GM 2WD truck? He starts yapping at me that it's a newer line of trucks that a mount hasn't been developed for them and I need to make an adapter plate yadda yadda yadda and I told him the STFU the LS truck line has been around for 10 years and they should explain it clearly on the box what years it's for. After a lovely exchange of vocabulary I hung up and went about my business! 
The guy obviously had a tranny mount stuck up his *** and wasn't in the mood to be helpful! 
Got the Old mount back in and if fit like a glove!!!
At that point I was like wtf!?!
So I called energy suspension and said hey, I got your tranny mount and it's not lining up with the crossmember. Now this person was a DICK!!! (I think his boyfriend didn't finish him off last night or something) We actually had words!! I explained to him that the stock mount had an offset pattern in order to properly aligned the tailshaft mounting holes to the crossmember and that their mount did not...He said he was well aware of this and that I didn't need to explain it to him.
I was like what's that supposed to mean? He then asked what kinda of vehicle I had and told him it was an 01 silverado and I got part number so and so which was specifically for GM 2WD trucks. He then explained to me that it doesn't fit LS engine trucks and proceeds to tell me that I should of known that before buying it. I asked him how I'm supposed to know that a product that is sold for GM 2WD truck is not supposed to fit my GM 2WD truck? He starts yapping at me that it's a newer line of trucks that a mount hasn't been developed for them and I need to make an adapter plate yadda yadda yadda and I told him the STFU the LS truck line has been around for 10 years and they should explain it clearly on the box what years it's for. After a lovely exchange of vocabulary I hung up and went about my business! The guy obviously had a tranny mount stuck up his *** and wasn't in the mood to be helpful! Got the Old mount back in and if fit like a glove!!!
Dec 26, 2010 | 09:57 PM
#15
On The Tree
Joined: Feb 2010
Posts: 136
Likes: 0
From: North Phoenix
I have been waiting for a 4x4 mount for an 05 and I want to say no, but never could get a straight answer... Also the 4x4 look like they have rivets in them to limit flex and breaking as well (stock mount)....
Dec 27, 2010 | 11:54 AM
#16
I spoke with someone very breifly at PATC (4l60dotcom) and she told me they had both available, the 2wd and 4wd poly trans mounts for the 99-06, but when I asked for details on the piece for 4wd she couldnt find any info on brandname and no photos either, only that the cost was just over double that of the 2wd ES unit. I decided to pass and just got some other parts...
Jan 11, 2012 | 08:24 AM
#20
Registered User
Joined: Dec 2011
Posts: 12
Likes: 0
Bump, I was cruising around the forum gathering bushing and mount partnumbers and opinions when I found this thread.
I have to say with all due respect to the OP that it is a VERY bad idea to use a stiffer than stock trans mount with soft stock engine mounts. Especialy if you are racing or hauling with your truck.
Many many transmittion cases have been broken due to this mistake.
As designed the motor mounts control the rotational forces of the engine/trans while the trans mount controls any vertical pitching motion encountered.
By securing the tail end of the transmission at a single point while allowing the motor to thrash around on stock soft mounts you are inducing huge twisting loads on the transmission case.
On the older gen-I and gen-II GMs the common breakage would be at the bellhousing since they were only attached by a little more than 180* of bellhousing.
With the LS based trucks and even the 4.3 having adopted the newer 360* bellhousing pattern that is much stronger I assume that the bell breaking is not so likely and that breakage of anything might be less of an issue but my guess is that the tail housing would be the next most likely failure point and the main case being the next most likely after that.
Either way its not something I would tempt fate on, as a general rule you want your trans mount to be only as firm as the motor mounts or softer. Never firmer.
I have to say with all due respect to the OP that it is a VERY bad idea to use a stiffer than stock trans mount with soft stock engine mounts. Especialy if you are racing or hauling with your truck.
Many many transmittion cases have been broken due to this mistake.
As designed the motor mounts control the rotational forces of the engine/trans while the trans mount controls any vertical pitching motion encountered.
By securing the tail end of the transmission at a single point while allowing the motor to thrash around on stock soft mounts you are inducing huge twisting loads on the transmission case.
On the older gen-I and gen-II GMs the common breakage would be at the bellhousing since they were only attached by a little more than 180* of bellhousing.
With the LS based trucks and even the 4.3 having adopted the newer 360* bellhousing pattern that is much stronger I assume that the bell breaking is not so likely and that breakage of anything might be less of an issue but my guess is that the tail housing would be the next most likely failure point and the main case being the next most likely after that.
Either way its not something I would tempt fate on, as a general rule you want your trans mount to be only as firm as the motor mounts or softer. Never firmer.
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