mikedunlop Posted September 22, 2007 Report Share Posted September 22, 2007 Hi guys , i have just started to do an transmision oil change on my 1998 sts , there was no drain plug so i removed the whole plate from the bottom of the gear box an drained the oil. I have 2 new filters for replacement the thing is i have read on previous postings that the oil needs to be drained out of the torque converter , is this always the case? the car has only done 50,000 miles i dont have access to any dealers as i live in Scotland , Edinburgh so any advice would be much appreciated. Thanks Mike. Edinburgh Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 22, 2007 Report Share Posted September 22, 2007 Hi guys , i have just started to do an transmision oil change on my 1998 sts , there was no drain plug so i removed the whole plate from the bottom of the gear box an drained the oil. I have 2 new filters for replacement the thing is i have read on previous postings that the oil needs to be drained out of the torque converter , is this always the case? the car has only done 50,000 miles i dont have access to any dealers as i live in Scotland , Edinburgh so any advice would be much appreciated. Thanks Mike. Edinburgh Not the torque converter you need to drain it from the side pan, there is a little bolt you need to remove, see these threads for more info: http://caddyinfo.ipbhost.com/index.php?sho...18&hl=drain See my post #95 in this thread http://caddyinfo.ipbhost.com/index.php?sho...P0717&st=90 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 Link to comment Share on other sites More sharing options...
mikedunlop Posted September 23, 2007 Author Report Share Posted September 23, 2007 Once again Bobby Fisher many thanks for the help Mike Edinburgh Link to comment Share on other sites More sharing options...
Patrick7997 Posted September 24, 2007 Report Share Posted September 24, 2007 In spring I did a fluid change.... it can also be done by removing the return line from the transmission cooler. This is the upper line, drivers side, of the radiator... small metal line. I removed that line, attached a hose to it, started the car, and let the pump pump the fluid out the line, into a container. Other people have done it this way. I run the car to pump out one gallon, shut the car off, pour in one gallon thru the normal fill, run the car again to get a gallon out, keep repeating until clean bright red fluid comes out your line. I know other people on here do it this way, I did not invent this... and don't confuse this with flushing... this is not flushing, this is just replacing the fluid. The only reason I bring it up is, I had promised at some point to post pictures of my line adaptor setup, and I think I forgot to do that.... So, with my apologies, this is my setup. I'm not saying it's optimal, but it works, and doesn't leak. The first picture is the device all together, ready to go. The second picture is the thing taken apart, to see the individual pieces. The first piece, on the left, is a 3/8ths inch flare fitting... with the unthreaded forward portion dremeled off. The small dome shaped brass piece there in the picture is what I dremeled off. The other side of that piece is 3/8ths inch pipe thread. That goes into a 3/8ths inch pipe thread male to male coupler. The next piece is a barb... Onto that, just press on a long section of plastic line.... I don't go crazy tightening that 3/8'ths inch flare into the tranny cooler... I just finger threaded it, finger tight, it's good, didn't leak.... I start the car, let it pump out a gallon or so, (which happens real fast, a few seconds), shut the car off, pour in a gallon, repeat until it comes out clean. When you're done, replace the cooler line, run the car a little, top off as necessary... my book says transmission fluid should be checked with the car warm and running.... And my apologies to the people I had told I would post this before.... sorry. Been a little busy. It took me around 18 quarts to do it... it was probably done at 16, but I did it one more time... Do not shift the car out of park while you do this.... Link to comment Share on other sites More sharing options...
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