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transmission problem


bigboyj1

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I have a 1995 seville sts with codes p029(shift b solinoid problem)p039(torque converter clutch engagement problem)p056(trans input speed sensor)p094(shift a solinoid problem-vehicle speed sensor).At times when shifting from 1st to 2nd it would shift hard. This went on for quit a while.One day while doing about 35mph it went into 1st gear and would not shift at all.This problem is current and the car is parked.I am wondering if replacing these sensors and solinoids will fix it or if the trany needs replaced.The trany never sliped as it would if it had worn out clutch plates.Any help would be apreciated.

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I looks like you need replace both Shift Solenoids. I replaced them in my former '94 Eldorado. It's not a difficult job, just a bit time consuming unless you've done the job before. Here is a link discussing my experience replacing the solenoids.

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I had to replace the shift Solenoid at around 40,000 miles

on my 1995 STS Seville. At 90,000 started having problems

with it surging & so I was told needed to replace the trans

input speed sensor; while it was in the shop I got a call

that I needed to replace the torque converter so I agreed.

when I got the car out of the shop & drove it about 5 miles

I realized I had bad problems....running really rough,

wasn't shifting out right,the shift lever was off ..you

had to put the selector in reverse to go forward, needless

to say I turned around and took it back. Finally, 3 weeks

later I got my car back. Had to order another torque converter

the first one was bad when I got my car home from this Cad dealer

they tried to double bill me for labor on #2 torque converter

I refused to pay & won that one but changed dealers.

Transmission has never quite shifted right since then but

I haven't had anymore work on it & that has been 7 yrs ago.

Getting another transmission code now but it still runs

good. This has been my only problem with the car. Now

showing some engine wear with oil leaking but I think

that is normal for the miles it has on it.

Jan

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I had to replace the shift Solenoid at around 40,000 miles

on my 1995 STS Seville. At 90,000 started having problems

with it surging & so I was told needed to replace the trans

input speed sensor; while it was in the shop I got a call

that I needed to replace the torque converter so I agreed.

when I got the car out of the shop & drove it about 5 miles

I realized I had bad problems....running really rough,

wasn't shifting out right,the shift lever was off ..you

had to put the selector in reverse to go forward, needless

to say I turned around and took it back. Finally, 3 weeks

later I got my car back. Had to order another torque converter

the first one was bad when I got my car home from this Cad dealer

they tried to double bill me for labor on #2 torque converter

I refused to pay & won that one but changed dealers.

Transmission has never quite shifted right since then but

I haven't had anymore work on it & that has been 7 yrs ago.

Getting another transmission code now but it still runs

good. This has been my only problem with the car. Now

showing some engine wear with oil leaking but I think

that is normal for the miles it has on it.

Jan

Describe what you call SURGING. Surging is not caused by the Input Speed Sensor (ISS). Maybe your problem was the torque converter and it needed an ISS.

I find it amazing that shops let cars go out without testing them

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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I have a 1995 seville sts with codes p029(shift b solinoid problem)p039(torque converter clutch engagement problem)p056(trans input speed sensor)p094(shift a solinoid problem-vehicle speed sensor).At times when shifting from 1st to 2nd it would shift hard. This went on for quit a while.One day while doing about 35mph it went into 1st gear and would not shift at all.This problem is current and the car is parked.I am wondering if replacing these sensors and solinoids will fix it or if the trany needs replaced.The trany never sliped as it would if it had worn out clutch plates.Any help would be apreciated.

I would start with replaceing the shift solenoids. There is a world of info on here about them. If you can't do it yourself go to a reputable transmission shop that works on Cadillacs. I used a mom & pop shop and got off easy, $75 labor. It will only take the about 1/2 to 1 hour to do. If I remember right when I changed my shift solenoids on my 94 Concours the P056 went away. Make sure all sensor wiring is away from the spark plug wires because it is subject to electromagnetic interference.

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jjangel your oil leak might just be from the oil pan bolts loosening up. Next time you have it in for an oil change have them check the oil pan bolts. It could also be a loose oil adapter among other things.

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