Motor and Trans Mount... Mine were spent

[RevHeat]

After 33,600 miles on my 96 GTS, I changed the motor and trans mount. I was not surprised that the motor mount was cracked, but was really surprised that my Trans mount was cracked. Replaced with Woodhouse mounts.

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[99 R/T 10]

Actyually, they don't look bad. Mine came completely apart.

 

[97snk]

which side of woodhouse mount goes on top on the motor mount? the longer bolt goes on top or bottom? I will be doing mine this weekend hopefully...

 

[LifeIsGood]

Mark says that the flat side of the mounts should face the ground. He also says that the long stud should go into the bracket...

Woodhouse poly motor mounts ?? post #15

I had no problem getting the flat sides facing the ground...but the long studs went into the frame on mine...no way to put the flat sides down and have the long studs in the bracket.

 

[dave6666]

Actyually, they don't look bad. Mine came completely apart.

Like this?

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[dave6666]

which side of woodhouse mount goes on top on the motor mount? the longer bolt goes on top or bottom? I will be doing mine this weekend hopefully...

Here's how much thread was showing on top when I was done. Of course that's not a stock nut but you get the point. I did have to remove the bracket and mount together from the car and put the blue wrench on the nut before it would come loose.

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[97snk]

Mark says that the flat side of the mounts should face the ground. He also says that the long stud should go into the bracket...

Woodhouse poly motor mounts ?? post #15

I had no problem getting the flat sides facing the ground...but the long studs went into the frame on mine...no way to put the flat sides down and have the long studs in the bracket.

I m doing the mounts right now and they go in both ways without any issues, so which side goes up and which side goes down...

 

[97snk]

Found the post by mike at woodhouse performance @ http://forums.viperclub.org/rt-10-gts-discussions/636639-woodhouse-poly-motor-mounts.html

The long stud goes into bracket not the frame...

 

[LifeIsGood]

You would think that Woodhouse could add some instructions with a few pictures to their mounts .

 

[97snk]

Mark says that the flat side of the mounts should face the ground. He also says that the long stud should go into the bracket...

Woodhouse poly motor mounts ?? post #15

I had no problem getting the flat sides facing the ground...but the long studs went into the frame on mine...no way to put the flat sides down and have the long studs in the bracket.

So do you experience a lot of vibration since your engine mounts are on upside down?

 

[Fatboy 18]

When I installed my Woodhouse mounts earlier in the year, I ended up with the flat part of the rubber mount uppermost in the engine bay, I was following the 'How Tos' thread with pics by Tony. Trouble is according to Mark from Woodhouse we have put them in the wrong way round

I was being really careful and looking very very closely at the pictures. I had no issues with length of bolts and thought I did a great job, then Mark said they were in the wrong way round?

The stud positioning on the new mounts have been installed on my car exactly the same way as my old mounts came off. The only diffrence is that the black rubber flat part of the mount is uppermost No issues so far. But will agree it would be good if they were stamped Left / Right / top bottom. There's plenty of room for a few markings even if it was done with a magic marker pen

http://forums.viperclub.org/illustrated-upgrades/603840-engine-mount-install-guide.html

 

[2000_Black_RT10]

Probably already know, but much of the destruction of the mounts is caused by chassis flex if anyone's interested in this babbling.. if not, no worries..

The engine and transmission is a fairly rigid assembly. Typically in my career, reviewing torsional tests of a frame such as a car which is body on frame like a Viper, there can be an increase in stiffness of the frame if solid powertrain mounts were swapped in. I've seen numbers up to 6% more increase in torsional stiffness due to solid mounts on some tests on other cars. This is a reason why flexible mounts are needed for a Viper, the engine mount brackets are not designed to be under that stress or at the ears on the block if the fame twists under load, (and also racking of the frame), and why they are a serviceable component.

I have Woodhouse mounts, they are nice quality. They are stiffer, it will be a small value (guessing 0.5%) but the frame will be slightly stiffer overall than using the softer OEM rubber mounts. OEMs are not going to use this type of urethane mount due to NVH reasons, customers typically don't want to drive a car that vibrates. Heck, when I pull my car up to my garage door at night, with the Woodhouse mounts, I can see even the headlights bulbs are jiggling. Long term vibration that can affect other components, electronics, etc.. another reason to steer away from solid mounts for a street car that's not designed for them. I think Woodhosue is an ideal route to take, slight risk due to additional vibration, but I think the benefits outweigh this since my car shifts better (don't miss 3rd gear) and because I am using a kevlar clutch that is gripper, the powertrain flopped around a bit too much on aggressive shifts with the OEM rubber mounts.

Thanks for posting the pics RevHeat. I was part of this presentation below, my name is in the doc.. when I used to work at Chrysler. It take a few minutes to load, if you want to read a bit about mount design.

http://support.mscsoftware.com/cgi-...e=ri/1-13/1-13B2-2703/DaimlerChrysler_Sui.pdf

Mike

 

[Fatboy 18]

Found the last thread on this issue

http://forums.viperclub.org/rt-10-gts-discussions/636639-woodhouse-poly-motor-mounts.html

 

[mjorgensen Woodhouse]

Sorry for being late to the party here guys been slammed and not on here nearly as much as I have liked. Either way the mount gets installed the performance will be the same, they will not work better or worse in any configuration. Some cars cannot get the longer studs into the frame, but if you did they will be just fine.

 

[Fatboy 18]

Thanks for the feedback Mark

That's made me feel a whole lot better

 

[LifeIsGood]

So do you experience a lot of vibration since your engine mounts are on upside down?

I stick to my guns about how I installed them. I had my headers off at the time, so I was able to jack up the engine as far as I needed. I could have installed them in any way that I wanted. They only went in one way with the flat side towards the ground and the smaller locking nubs in the correct position.

The only issue that I have found so far is that I'm having to get used to finding 3rd and 4th gear...they are slightly different than before...maybe the shift is a bit tighter than it used to be .

 

[Fatboy 18]

You do get a little bit more vibration through the car with the new mounts because they are stiffer and the engine revs have to go somewhere But as Mark now states they can be mounted either way. But the locating pins and studs should be in the same position as the original mounts. Hope that makes sense!

 

[darkostoj]

New mounts were the best thing i did to my car, i love them

 

[jay01m]

So did the new mounts stiffen up the drive train? I've had some ridiculous drive train slop and I'm hoping the new mounts will fix the problem.

 

[mjorgensen Woodhouse]

So did the new mounts stiffen up the drive train? I've had some ridiculous drive train slop and I'm hoping the new mounts will fix the problem.

Yes it will transform your car.

 

[viper k]

how do you get the top nut off the mount is thier a special wrench!

 

[Fatboy 18]

You remove the bolts holding the Aluminium bracket to the Engine block then with the mount mounted in a Vice use a socket with a short extension to undo the nut.

 

[viper k]

i was thinking that but wasn't sure thanks FATBOY