Question about Cadillac CTS
The manual shifter does not move smoothly down from third gear to fourth position - feels like it is getting blocked on occassions. Dealer inspected and advised problem was drive shaft bushing or loss of gearbox fluid. I find both hard to believe. It feels more like wear / lack of lubrication in the shifter mechanism. Otherwise vehicle runs well with 115,000 on clock
You would be closer to the problem than the dealer
taking it as a column shift , it is very possible that the plastic slides on the selectors out side of the box are badly worn or the rods them selves are worn out
Posted on Sep 09, 2017
SOURCE: GEARBOX WONT GO INTO GEAR
hi from uk could you please give a little more info ? what make/model car ? has this problem occured suddenly? has car been layed up off road some time prior to this unable to select gears ? this problem sounds very much like the clutch drive plate is either stuck to flywheel hence question above ? or it is sticking on primary/spigot shaft for some reason and failing to disengage drive to g/box? how does clutch pedal feel ? you might try selecting 2nd gear with clutch fully pressed and h/brake on then try starting engine if engine starts ?runs then put slight revs on and slip clutch a few times this may work if plate is sticking? if you come back with update may be able to advise further
Posted on Dec 24, 2008
I have a Focus that had shifting problems. I tried different fluids, but eventually I tried Royal Purple Synchromax (I believe) and it actually shifts fairly well now. I used to hate the car for this. It has 130k miles and I like driving it now.
Posted on Jul 21, 2009
I have the same problem on my 2005 cts. The shifter fork has two rubber bushings that attach at the transmission that break or give way. I assume they did this for a softer feel and to avoid vibration but it leads to the selector not engaging well when you go the extreme direction of reverse on the shifter as there is too much deflection. I replaced the bushings with washers as spacers and it seems to work as a "McGyver" fix. I do intend to get the parts needed from Cadillac to restore it to factory standards. Hopefully they have the parts. To fix the problem you have to go under the car. To get good access you have to disconnect the exhaust and the driveshaft. I did it without this and just tormented my poor hands but I wasn't willing to do all the other work while in my driveway. You simply take the clip holding the fork shaft onto the transmission selector end off and slide the small shaft out. I also took off the shifter side of the fork to study the thing a bit better. That takes a 13mm and a small allen wrench, 4.5 or 3/16, can't remember. Then replace the bushings or do as I did and stack some washers so as to get rid of the slack between the inside of the fork and the gear selector on the transmission. Assemble and try. If you have as good dexterity and tenacity at your fingertips as I do, you'll curse the day you attempted doing this without taking out all the other stuff. If you don't, take out all the other stuff to make room for your hands. The space is very confined. Good luck.
Posted on Sep 26, 2009
Most likely solution is the gear selector fork in the transmission has broken and is no longer engaging the gears.
Repair requires transmission removal and partial overhaul.
Posted on Dec 26, 2009
Testimonial: "good diagnosis. right on the money"
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Feb 03, 2016 | Cars & Trucks
1-2 Shift Solenoid Valve
3-4 Shift Valve Bore Plug
Burned, slipping, missing
4th Servo Cover
4th Servo Pin
4th Servo Piston
4th Servo Seals
Rolled, cut or damaged
Slipping or No Fourth Gear
Slipping or No Fourth Gear Checks
DEFINITION: A large engine RPM increase is noted in fourth gear, Drive range, with little or no vehicle forward speed increase. First, second, and third gear operation are normal. Shifts into fourth gear are soft or do not occur. Fourth gear ratio is 0.705:1.
Automatic Transmission Fluid Level
Low fluid level
Transmission Main Line Pressure
Low transmission main line pressure
Oil Filter Assembly
• The oil filter assembly (100) is missing, plugged, or damaged.
• The oil filter seal assembly (101) is missing or is damaged.
Control Valve Body Assembly
• The 3-4 shift valve (362) or the 4-3 manual downshift valve (360) is stuck or binding.
• Debris is found in the passages of the control valve body (301) or of the control valve body spacer plate and gasket assembly (396)
Case Cover Assembly
Distortion or damage occurs at the manual valve (404) or at the case cover (401), causing PRN oil leak.
Driven Sprocket Support Assembly
A plugged third clutch oil passage in the driven sprocket support assembly (609)
Fourth Clutch Assembly
• The clutch plates (500-502) are worn, damaged, or misassembled.
• A missing or not seated fourth clutch spring retaining ring (601)
• A damaged spring assembly (602) or piston (603)
• Worn or damaged fourth clutch piston seals (604, 605)
Third Clutch Sprag Assembly
• The sprag (720) was misassembled or backwards on the inner race (661).
• A damaged third clutch sprag assembly (653, 661, 719-721)
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