Motor/transmission mount question

[bart]

I have been chasing a ujoint sounding noise for a while. Haven't been able to really get my hands on it. Then, recently my tcase shifter kinkage (mine is the AA bracket) started getting into the body. Here is a pic of it:



Everything looks okay to me, but I suspect the tranny and/or motor mounts may be bad. They are the factory ones with just over 100k on them. Time to put in some poly? Here's pics of the mounts, as good as I could get.





Not much to see at the tranny mount.

[bart]

Probably a better pic of the DS mount here. Also, you can see my new Banks header.

[mrblaine]

It's hard to tell from the pics but it looks like the motor mounts are tipped forward a bit.

I've never been able to keep the AA linkage relocator out of the tub. I've always had to cut them and narrow them up to pull the outside in towards the trans and then shorten the bellcrank by splitting it in the middle are the large part, removing material and welding it back together.

I scratch a heavy line across the tube so I don't lose the clocking on the two shift arms.

With the way everything looks like it's moving, it seems that gravity would let the heavy stuff like the motor and trans settle on the mounts which would pull the shifter away from the tub.

Yours looks like the tub is settling if the shifter wasn't always in the body unless it's doing it under motor torque in which case you need to replace all your driveline mounts. I seriously doubt the body mounts have settled.

[bart]

The linkage braket has always been close, but it wasn't hitting to begin with, so somehting has changed. It seems to hit under certain RPM, not necessarily acceleration. Having some ujoint sounding vibe under accel and decell, so I was suspecting the mounts.

[bart]

Suggestions from anyone on motor and tranny mounts? I have seen:

Motor:

JKS/Currie 1" lift poly
MORE 1" or stock height rubber
Daystar 1" poly

Tranny

Daystar poly

On the motor, I currently have stock mounts with spacers from (Tera? JKS?) under them. I have a 1" body lift and 33Engineering belly skid woth HP axles on both ends. Good time to go with 1" motor mounts, I guess.

[Jeff Weston]

I had the Currie mounts. Between the melted driver's side bushing on three different Jeeps and the additional vibes, I went back to the Tera spacers which have worked fine for years with the stock tranny mount.

[mrblaine]

Originally posted by bart
Suggestions from anyone on motor and tranny mounts? I have seen:

Motor:

JKS/Currie 1" lift poly
MORE 1" or stock height rubber
Daystar 1" poly

Tranny

Daystar poly

On the motor, I currently have stock mounts with spacers from (Tera? JKS?) under them. I have a 1" body lift and 33Engineering belly skid woth HP axles on both ends. Good time to go with 1" motor mounts, I guess.

Like Jeff said, I went back to the stock mounts to get rid of more than necessary vibes.

It's not perfect, but much better than anything else. I did the MORE on Kat's and they are intermittent worse than Currie at different RPM's.

To be fair to the Currie's though, my skid is flat to the frame and that puts too much angle on them. That really tweaked them too much to work without hacking up the mounts.

[TObject]

As Jeff mentioned: the bushings in Currie motor mounts tend to melt. But the good news is that they are standard size leaf spring hanger bushings from earlier jeeps, thus replacements can be easily obtained.

[bart]

I am going to order some more stock motor mounts and keep using the current spacers. Thanks for the input.