2005 Cadillac CTS shudders

PAUL1974_CADDILLAC

MEMBER
2005 CADILLAC CTS
6 CYL
2WD
AUTOMATIC
77,000 MILES

A quick history
1. The transmission fluid mixed with the antifreeze. So I replaced the radiator. Flushed both systems three times with new filter in tranny each time.
2. The trannsmisson filled with antifreeze when this happended and again has been flushed more than once.
3. I noticed I had a bad tie rod end on the right front so I replaced it.

WHAT I HAVE DONE.
1. Replaced fluids more than once.
2. Balanced the tires.
3. Brake pads and rotors are new not resurfaced on all four corners. Maybe 4000 miles on brakes.
4. Replaced a tie rod end.

SYMPTOMS.
1. THe car shakes at or near shift points
2. In the areas of 35 to 40 and 55 to 60.
3. THe car has been skaking at breaking from higher speeds for some time now. Prior to radiator failure.
4. When the car is shaking at these points I can give it a little more gas and it stops. I can manually downshift and it stops. I can turn on the sport button and it stops. So it stops with the RPM change.
5. All of the shaking while driving happended after the radiator-transmission incident.
6. So I think it has something to do with the tie rod or something went wrong with the tranny.
7. The car was only driven for maybe 5 miles tops when I noticed fluid coming out of the overflow bottle

1 Reply

MHPAUTOS

MECHANIC
31,937 POSTS

HI there,

Thank you for the donation,

With any problem of water ingression in the transmission, there is often the chance that there can be lingering problems like you have started, the problem is that the antifreeze agents can react with the rubber components rather quickly and start to cause problems with sticky valves and servos. Often changing the fluid is not enough as there is a considerable amount of fluid in the torque converter that will not be changed, I would be getting the transmission power flushed, this is a continuous oil flush while the engine is running so the trans can change all the oil in coolers & the torque converter, get this done by a trans specialist as they will have the opportunity to pick up any other small problem that may be causing you some issues with this problem, start here.

Mark (mhpautos)