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Old 05-25-2012, 02:00 PM   #1
Dave The Barbar
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Default It's Decision Time

I just lost reverse on my 2001 SC2 auto - rebuilt trans 2 years ago and the warranty is expired. I had reverse slam for a couple of weeks and had a shop appointment for next Thursday.. I am using a quart of oil every 200 miles. Until the trans went, I was thinking about a rebuilt engine and giving the car to my daughter as a graduation gift. Her first car - for college... a three hour drive from home.

But since I don't have a shop, I don't do much of my own work and I don't have money to spend. So do I fix it or replace it - oh, my wife's 2000 SL2 has 210,000 miles and the same oil problem.

A question I have is about a rebuilt engine. Is there a fix for the oil ring issue that causes the oil consumption or will it happen again?

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Old 05-25-2012, 02:05 PM   #2
ssewall
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Default Re: It's Decision Time

Drilling return holes in the piston's oil ring groove should solve the sticky rings issue. Before replacing or rebuilding an engine you can attempt the MMO piston soak, which may or may not help.

You shouldn't need to replace the whole trans if all you have is reverse slam. Replacing the valve body with a rebuilt one with the Sonnax update should solve the problem once and for all. You can find these on ebay, also SF member "Special Forces" provides rebuilt valve bodies. Reverse slam that has been let go for too long can damage the friction material in the trans however, which would require a rebuild or replacement.

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Old 05-25-2012, 02:40 PM   #3
Dave The Barbar
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Default Re: It's Decision Time

Quote:
Originally Posted by ssewall View Post
Drilling return holes in the piston's oil ring groove should solve the sticky rings issue. Before replacing or rebuilding an engine you can attempt the MMO piston soak, which may or may not help.

You shouldn't need to replace the whole trans if all you have is reverse slam. Replacing the valve body with a rebuilt one with the Sonnax update should solve the problem once and for all. You can find these on ebay, also SF member "Special Forces" provides rebuilt valve bodies. Reverse slam that has been let go for too long can damage the friction material in the trans however, which would require a rebuild or replacement.
Yeah, I hoped I had caught the slam early- I noticed it a few weeks ago, but reverse is completely gone.

I don't have the tools to do the engine myself and my garage(an old carriage house) has a dirt floor.

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Old 05-25-2012, 03:15 PM   #4
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Default Re: It's Decision Time

If you don't mind driving stick, a manual swap is a pretty solid fix for the reverse slam issue, though I wouldn't even bother trying to ask a shop to do it. It's very easy, I wonder if there might be an experienced member on this forum that could help you out with some hands-on work at a reasonable fee.

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Old 05-25-2012, 03:53 PM   #5
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Default Re: It's Decision Time

Quote:
Originally Posted by Dave The Barbar View Post
I noticed it a few weeks ago, but reverse is completely gone.
I don't have an auto trans, so I don't really pay much attention to what I see here about fixing auto transmissions - but I recall seeing references to losing reverse beging fixed by retorquing an input (?) shaft nut. Might be worth searching on - and asking a friend/relative if you can borrow their garage (with concrete floor ) for a weekend

IIRC, you need a thin-walled 23mm socket? Search will get some definite answers

edit: found a How To
http://www.saturnfans.com/forums/sho....php?t=112858#

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