2000 Saturn SL2 I need advice

YOUNGGRASSHOPPER

MEMBER
2000 SATURN SL2
1.9L
4 CYL
FWD
AUTOMATIC
100,000 MILES

I am working on a 2000 Saturn sl2 and its got see codes p0732 p0733 and p0734. One day the owner heard a clunk, then when he tried to use reverse later on and it did nothing. The transmission leaks so much oil, I couldn't quite get a very good look at there it was coming from, it seemed like an axle seal but not sure. But reverse does not grab at all. I've looked at a ton of other posts, and a lot say its the valve body and some say input shaft and output shaft bolts need to be replaced. I have never really worked on an automatic transmission, but I know they are sensitive and not sure how to go about doing this.

5 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

With the forward gear codes its more then a loose input shaft nut fourth gear is on the output shaft.I have never seen a output shaft nut loosen and cause issues. You will need a transmission pressure tester to properly diagnose the issue. What kind of scan tool do you have?

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Monday, December 2nd, 2013 AT 8:28 PM

YOUNGGRASSHOPPER

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3 POSTS

They took it to auto zone, and those are the codes they received p0732-p0734 the reverse no longer works, and those code say the gears aren't shifting right, I have read that the output nut can come lose because its got right side threads on a right turning shaft. Rpms could make it come loose overtime.

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Monday, December 2nd, 2013 AT 9:00 PM

SATURNTECH9

MECHANIC
30,870 POSTS

Iam a factory trained saturn tech and have worked for saturn for over 16yrs and have never seen the output shaft loosen up and cause transmission issues. Also those codes are for incorrect ratio errors meaning the computer saw excessive slip on those gears.I have seen the input shaft nuts loosen up so much the the first gear clutch housing wears into the end cover. You will need a transmission pressure gauge set to start diagnosing. Otherwise you will be just guessing whats going on.

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Monday, December 2nd, 2013 AT 10:23 PM

YOUNGGRASSHOPPER

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3 POSTS

That's cool I'll just go get a used transmission.

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Monday, December 2nd, 2013 AT 10:30 PM

SATURNTECH9

MECHANIC
30,870 POSTS

Even if I had the car in front of me I would still need to do a transmission line pressure test to see how the line pressure solenoid is working along with the pressure regulator. Also what the pressure is in reverse drive park etc with the line pressure fuse in and out. You could have a bad line pressure solenoid worn pressure regulator bore wires going to valve body could have issues. Iam trying to help you sorry it wasnt the heres the problem without doing some diagnosing. Like I said before even if I had the car in front of me I would still be doing a pressure test etc. Also if I ended up removing the valve body I would be air checking the clutches with compressed air to make sure all the clutch pack pistons weren't leaking and the reverse servo piston was working correctly. Please dont get made at me for trying to help you fix it correctly and not just throw parts at it. Even if you get a used transmission it could still have the same common issues or shortly down the road get them. Your better off just fixing the one you have. The reason I said you will need a transmission pressure tester set is because you will. If your unwilling to get the correct the tools and listen to me on how to diagnose the car why would you get made at me?Just doesnt make sense. If you need a recommendation on a pressure tester I would recommended the one I have its pretty cheap that's if your interested. Sounds like you have made up your mind to just do it your way good luck to you I hope it all works out for you.