I probably shouldn't tell you what I do, but what the heck, its worked
for years with no problems. We'll let the boys in here chew on this
routine for awhile.
Before I remove the trans pan & filter I remove the trans line going
into the side of the case and then start the car up to pump the oil out.
I got a clear tupperware storage container I let the fluid run into. I
got a line on the side of the container which is the 2 gallon mark, then
I shut the car off. Other guys I know would shut the car off when the
oil stops spurting out, but then the trans may get to hot.
Afterwards , I drop the pan & filter.
Depending how much oil is around the house I may pull the line of a day
later and pump out another gallon or so, then refill.
Of course since my transmission was rebuilt it runs 5 more quarts than
originally intended, 15 instead of 9. The trans man said this trans
should run with more oil than what GM originally specified. He said that
there were independent tests done and it was determined 15 quarts of oil
was better for this trans. Of course nobody at the Chevy dealer I deal
with has ever heard of this, nor anybody else I've mentioned it to. But,
our trans man has been in business since the early 70's and he does alot
of speed work, shift kits & race cars, so I trust his work.
108,000 miles on the rebuild trans.
So, 15 quarts have been in it since 2001 and it don't foam up and works
just fine. Now I change it every 30,000 miles. or once a year say.
This is the old style hydraulic trans, not the all electric style like
92 & up.
1991 Pontiac Bonneville LE
3800 V6 ( C ), Black/Slate Grey
~~~The Former Fleet ~~~
89 Cavalier Z 24 convertible
78 Holiday 88 coupe
68 LeSabre convertible
73 Impala sedan