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Driveline slack woes


carl425

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A while back I changed a front motor mount because of what felt like the motor moving when I accelerated from a slow roll or dead stop. Replacing the mount made no difference and since then I have noticed some other symptoms and I'm hoping someone else here could shed some light.

As I mentioned, it feels like there is "slack" that is being taken up when I accelerate from a stop or slow roll. It also feels like something is disengaging while coasting at very low speeds (approx. 5 mph). I noticed the latter in a recent traffic jam (or "stau" here in Germany). I'm thinking it is in the tranny as it is the only thing that can produce the slack feeling if all the mounts are good.

As usual, any help is greatly appreciated. :)

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Does your year have the two dog bones at the top of the engine between the engine and the radiator support? If you do, have a look at them.

Check your axles for CV joint wear.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Does your year have the two dog bones at the top of the engine between the engine and the radiator support? If you do, have a look at them.

Check your axles for CV joint wear.

It doesn't have the dog bones at the top of the motor and both CV joints were replaced when the tranny was, about 40K ago... It seems like maybe some servo or governor on/in the tranny is bad. My brother does auto tranny work for a living but he's back in the states and won't give a prognosis via the phone as he doesn't want me to spend any time or money unless he knows what it is...

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