Transmission issues

[MyOpel]

Your speedo gets its signal from the right rear abs sensor

[Xaphoeous]

Originally Posted by KateraK

I have a 1998 catera and I had the same problem, and I too replaced the tranny, and it did fix it.
BUT now its happening again and I thought noooo it cant be another bad tranny!!!! So i looked at the connectors on and around the tranny housing. They were a little oxydized so I cleaned them out and now it shifts just fine and is back to normal, so I looked at the tranny i replaced and it is still good, just a dirty connector.
My two cents.
my ABS and TCS and check engine light are still on though and I have no speedometer still but the tranny still shifts good in drive at least.
BTW I have went through school for automotive repair and received a degree but no longer work on cars for a living, so I pretty much know what im doing, just dont always know the problem lolz.
but anyway i hope this helps someone, dont forget dielectric grease on all connectors!

edit

Could you please explain where and how I should look for these connectors on the transmission? I had this problem today, the PRNDL lights all on but randomly changing, winter 3rd gear start contantly on, can't shift past 3rd gear...etc. I unplugged the number-5 fuse from the panel (TCM fuse) and it now shift fine, but the PRNDL lights are still going nuts.

Where can I find the connectors that might be oxidized and need to be cleaned?

Thanks!

[Just_me]

My 2000 catera with 80K miles on it has a problem shifting when the car starts running only when its cold and not worm enough. If I drive it that way before you know it often times the "S" sports mode light starts flashing and then the car can't shift hears no more. I was thinking maybe I need to change my transmission fluid, but it seems so complicated so I wanted to get more help. I think I found the drain plug, but it seems like its a bit high, so I was wondering if that will get all the oil out. And one big question is where is the fill hole located? I can't seem to find it, is it located somewhere really close to where the drain hole is? I just don't want to unscrew anything extra. And I was thinking if that would be okay to just change the oil and not the filer, withough going through so much trouble. It's just im not even sure if the oil is causing the problem. Also, what kind of transmission oil would be recommeneded? and how much oil should be in the transmssion? Thanks!!

[Xaphoeous]

Just_me, my problem ended up being the Transmission Range Switch. It was about $390 for the part and labor at my local Cadillac dealership. The "drain plug" you're speaking of is also the fill hole, I think. If you're not broke, I'd recommend taking your car to a Cadillac dealership. You're probably better off paying a few hundred bucks to get it done right, than to "save" money by doing it yourself, just to eventually get it towed to a dealership for a new transmission after doing something wrong.