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Hi, I am new to this site and need some advise. I have a 95 Deville with a 4.9L Vin B and 4T60E trans with vacuum modulator. I was pulling out of a parking lot the other day on wet roads and my wheel spun a little and I heard a squeal (not the tires) and all of a sudden the tranny is not shifting right. It shudders a little on take off. and there is a loud whining noise coming from the trans. The noise is louder in park and neutral. It is acting like it is only partially engaging the gears. It goes into gear in all shifter positions. But, just feels weak. The only codes I could pull on the dashboard readout are po41, io39, to37. Is there any chance this can be fixed without replacing the trans? Also there was no warning before this happened. Shift solenoid? tcc solenoid? pwc solenoid? Any input would be greatly appreciated.

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The tranny on my 91 went out and it was the SPRAG. When its in neutral or park when you rev the engine does the car seem to lunge forward and there is a loud metallic noise? Mine started to slip in 4th, then 4th became unusable, it progressively got worse

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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Total rebuild the sprag broke apart, it was $2200 to rebuilt my tranny. See if you can find a tranny in the scrap yard, it was used until 95.

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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Have it looked at by a reputible tranny shop, the shop I took mine to immediatly knnew it was the sprag, he handed me the bad parts.

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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