1999 Saturn SL1 Saturn SL1

QUEENBMX4

MEMBER
1999 SATURN SL1
4 CYL
2WD
AUTOMATIC
150,000 MILES

I have a 1999 Saturn SL1. The transmission has gone out. I also have 1993 Saturn SL2. I am wondering if I could take the transmission out of the 93 Saturn and put it into the 99 Saturn?

Saturday, April 10th, 2010 AT 8:39 AM

5 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

No u can't the sl2 is a differnt transmission an has differnt gear ratios then the sl1. Let me know if u have anymore questions.

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Saturday, April 10th, 2010 AT 9:37 AM

QUEENBMX4

MEMBER
3 POSTS

Thanks! Would it be possible to replace the engine and transmission of the 1999 Saturn SL1 with the engine and transmission of a 1993 Saturn SL2? I just don't want to tear into the engine and transmission if it won't work.

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Saturday, April 10th, 2010 AT 1:30 PM

SATURNTECH9

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Changing from a 1999 sl1 engine and transmission to a 1993 sl2 engine and transmission no not a good idea. Ur changing from a single cam engine newer emissions to a twin cam engine older emissions no I would not do that. Let me ask u question what exactly is wrong with ur transmission u have in there now maybe its cost effective to just repair. Let me know whats wrong with it and ill help u out with that.

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Saturday, April 10th, 2010 AT 2:34 PM

QUEENBMX4

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3 POSTS

It works fine when the transmission is cold. Once driven for 20-25 miles, when I park and then try to go into reverse, you can feel it try to go into reverse but you have to keep foot on brake and rev the engine to 1000RPMs, then it will go into reverse. All other gears seem to work fine.

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Sunday, April 11th, 2010 AT 2:34 PM

SATURNTECH9

MECHANIC
30,869 POSTS

Sounds like u have A bad valve body in ur transmission. Reverse uses full transmission pressure unlike ur foward gears which uses less pressure what happens is the pressure regulator in the valve body sticks and doesn't allow full pressure to come out of it so u get a delay in reverse or have to give it a little gas to build up more pressure to get into reverse. When ur car is cold the fluid is thick and when ur car warms up the fluid thins that's why it only happens when hot.U would still have to have ur car tested to make sure u don't have a problem with ur second gear piston because reverse doesn't have it's own clutch it uses second gear clutch and if the piston has a leak that could cause ur reverse issue. But the valve body issue is pretty common I have replaced alot of them for reverse issues. Or u could change the transmission with a good used one. It's up to u. Let me know if u have anymore questions.