gomopar89
Active Member
I just had new u-joints and a new tranny mount installed and now I can feel engine vibration in the floor pan! It's also noisier now inside the cabin....WTF???
Any ideas why?
Any ideas why?
I had not seen that happen to a Chrysler vehicle (yet) but that doesn’t mean it won’t or can’t. I have seen that occur to other car lines, though.As I understand them, the lock-up torque converters can weld themselves together if the
That was the weight that was on my 77. That`s why I why asking because it was attached to the trans mount.
I was under my ’77 wagon this weekend and it has the transmission harmonic weight still attached (which may be a different design than yours).
View attachment 31364
This design has a bracket welded onto transmission mount which mount attaches to (via rubber bushing).
If a shop installed the wrong transmission mount, they might have left the weight off (maybe).
Newer versions of transmission use a similar transmission mount that the welded-on bracket that attaches to exhaust (mid-exhaust support) (see pictures in post # 8).
I had not seen that happen to a Chrysler vehicle (yet) but that doesn’t mean it won’t or can’t. I have seen that occur to other car lines, though.
Usually, on Chrysler lock-up converters, when in lock-up mode, if the clutch plate material inside of torque converter is wore out, it can cause a vibration when engaged.
On most lock-up transmissions, if you are going up an incline with low throttle pressure, you can usually feel each time the transmission shifts and lock-up engage. If feels somewhat like a 5-speed transmission, shifting 4 times (if that makes sense).
On our vehicles, the lock-up disengages during shifts, to allow for more torque multiplication, then engages about mid-way before next up-shift.
Now I have seen bearing failure inside of the torque converter – but generally it causes more of a gear or whine noise when lock-up is not engaged and not so much of a vibration.
Usually if the lockup clutch plate is (out of lack of better description) spot welded itself, it generally acts like a manual clutch vehicle when coming to a stop – without pushing in on the clutch first, for in effect, it is doing the exact same thing.
Note: the lockup-clutch is always disengaged below a certain speed, no matter what gear vehicle is in at the time.
In his case, especially, after a transmission mount was replaced, I don’t think his torque converter is his problem.
BudW
There are a dozen methods Chrysler used to remove the harmonic powertrain vibrations/noises – and the examples shown (above) is a couple of those methods.That was the weight that was on my 77. That`s why I why asking because it was attached to the trans mount.