Question about 1995 Mercury Cougar
It sounds like you have two internal issues to deal with.
I would not suspect an axle problem at all, as they are immobile while idling. Torque converter problems are typically no low speed acceleration, no high speed acceleration, or stalling the engine right before stopping. None of which are problems you describe.
The metallic ringing sound is indicative of a failed retainer inside the transmission. An internal gear failure would not be heard at idle.
There are large snaprings that separate the sets of discs inside the transmission. There is constant motion at these points, even at idle. Once there is a failure here, be it a snapring breaking or a disc failure, the damaged/broken material is then transferred through the transmission via the fluid system.
This is where your second problem comes in with the slipping out of gear/snatching gears randomly, particularly while pitching the vehicle. Once the debris finds its way to the valve body, it will create tiny temporary restrictions at your shift solenoids. It is likely you have a small (very small) piece of debris that made its way into a shift solenoid.
The next step, which I hate having to tell people, is to remove the transmission and open it up to find the failure point, then evaluate the situation from there. Depending on the failure as well as the mileage on the transmission, there are different paths to consider.
Please let me know if you need clarification on anything or additional questions, I'd be happy to help.
Posted on Oct 02, 2009
This is not a Drive shaft problem. This car has been facing transmission problem since 1994.
No doubt, it can be Torque converter problem but usually it has seen that it's mainly if you have transmission slip in gear 4-5. I have rarely seen such issue with gear 2. BUT,
I have came across many cases, where it was an issue with control sensor. The above symptoms are the same for faulty control sensor.There is a technical bulletin, check below :-
TRANSAXLE - CD4E - HARSH AND DELAYED 1-2/2-3
UPSHIFTS - AFTER TRANSAXLE OR TURBINE SHAFT
SPEED SENSOR (TSS) REPLACEMENT - POSSIBLE
DIAGNOSTIC TROUBLE CODES (DTC) 628, 642, 645,
646, 647, 648, P0731, P0732, P0734, P0741, AND
Some vehicles equipped with the CD4E transaxle may exhibit harsh and delayed 1-2/2-3 upshifts along with DTCs for gear ratio errors after the Transaxle or Turbine Shaft Speed sensor (TSS) have been replaced. DTCs may include OBD1 codes 628, 642, 645, 646, 647, 648, or OBD II codes P0731, P0732, P0734, P0741, and P1744
If the condition occurred after servicing the Transaxle or TSS, refer to the following TSS Selection Chart and select the correct TSS for the vehicle application. Note that each TSS has the Ford engineering part number on it. Also note that there is a TSS kit that includes an instruction sheet, TSS sensor and correct bolt.
If the condition occurred after replacing the Transaxle or TSS, use the TSS Selection Chart and determine the correct sensor for the vehicle.
1. Remove the existing TSS from the CD4E pump body.
2. Reinstall the original TSS sensor, if available, or install the correct TSS as indicated in the Selection Chart.
3. Clear all codes and verify repair.
4. If the condition still exists, follow normal diagnostics as listed in the appropriate model year Workshop Manual.
This needs further investigation. So, scan the codes and if you see any of the above mentioned codes, replace control speed sensor.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
Posted on Oct 01, 2009
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Posted on Jan 02, 2017
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