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Old 09-25-2007, 06:45 PM
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I too am having the same exact problem. How much money would I save by rebuilding it myself rather than going out to a junkyard and getting one there?

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Old 09-25-2007, 10:54 PM
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Check the fluid level before you tear it down.
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Old 09-25-2007, 11:38 PM
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Fluids there, not perfect but there. The car hadn't been run at all maybe for about 8 to 9 months now. The fluid is old and looks all burnt and used up, but I couldn't find anything for bleeding tranny fluid and refilling it on a THM350. Of course, I can do about everything else on the car, but the one area I expected to be okay is the area I don't know much in.
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Old 09-26-2007, 07:26 AM
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Quote:
Originally Posted by BIGK
Fluids there, not perfect but there. The car hadn't been run at all maybe for about 8 to 9 months now. The fluid is old and looks all burnt and used up, but I couldn't find anything for bleeding tranny fluid and refilling it on a THM350. Of course, I can do about everything else on the car, but the one area I expected to be okay is the area I don't know much in.

have you dropped the pan on the t-350 to see what is there?


Sounds like it may have hard internal seals and a proper over haul is needed.

bad modulator or vacuum hose will NOT stop the trans from going into gear --- forward or reverse...... an old wives tale that lives on

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Old 09-26-2007, 03:23 PM
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How do I change fluid in a TH350 Turbo?

Hey, I know this is a stupid question to some, but I don't know how to change the fluid in my 1976 Chevy Monte Carlo's TH350 Turbo tranny. If anyone or everyone could post good, fast techniques and step by step directions, it would be greatly appreciated. My forward gears appear to be toast, but the reverse is still working. It's probably time for a rebuild, but I want to be sure it's not the fluid first.
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Old 09-26-2007, 03:59 PM
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Trans

If i was u iwould just drop Trans pan and change filter and fluid before rebuilding, good luck
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Old 09-26-2007, 04:02 PM
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Hi,
If you just want to check if the trans
fluid is burnt, pull the dipstick out &
smell it, also trans fluid is supposed to
be red. I don't know what color it is
burnt as I'm colorblind, I know it's dark.

Now if you want to change the fluid, get it
in the air & when it's safe for you to get under the car,
check to see if you need to move the cross member
in order to get the pan down, if not start loosening
the pan bolts, then remove the pan bolts from one of
the front corners, put your catch pan under that corner,
Now loosen the other bolts a little more & try & get that
corner down to let fluid out, continue loosening bolts
& get as much fluid out as passable, (don't bend the pan)
but be careful you don't drop the pan either,
(makes a big mess) pan down pour the rest through a
paint strainer, check the strainer & the bottom of the
pan. Now to get the filter out, some have a strap & a
bolt, others just push in & out.
Good luck,
rich

PS It's not a stupid question if your trying to learn
something.

Last edited by richard stewart 3rd; 09-26-2007 at 04:09 PM. Reason: PS
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Old 09-26-2007, 06:58 PM
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The fluid is almost if not black. Not even a hint of red, it looks more like oil to tell you the truth. Could this be the problem?
-Reminder: The problem is that it will drive in reverse, but not in any forward gears-
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Old 09-26-2007, 07:06 PM
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I have not, being that this is not my area of almighty wisdom, I don't know how.
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Old 09-26-2007, 07:09 PM
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Hi Again,
Your trans is history, what made the fluid
black, is the burnt friction material that was
on the clutch plates.
sorry,
rich

Last edited by richard stewart 3rd; 09-26-2007 at 07:10 PM. Reason: clutch
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Old 09-26-2007, 07:59 PM
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Just an idea,when I take off a tranny pan,i always weld a ("bung")drain plug on the side of pan to ease draining the next time,use pipe plug or oil pan plug with magnet on it.
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Old 09-26-2007, 09:03 PM
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Quote:
Originally Posted by BIGK
I have not, being that this is not my area of almighty wisdom, I don't know how.

If you can not unbolt a trans pan.... get some help from a person with trans knowledge and tools.

good luck.

ALso on a moderator note....I merged your other posts on the old thread into this one so all info is in the same thread for easier reference..
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Old 09-26-2007, 11:15 PM
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Once you get the pan off, look at its front wall, over toward the passenger side. See the kinda rounded area that's a little deeper than the rest of the front wall? That's where GM put a drain plug on the '70-model cars, then decided it cost too much and deleted it. You can get a drain plug kit in the HELP section of AutoZone, etc., for ~$4, and you won't hose your head down with ATF next time it's time to drain it. The white plastic washer breaks kinda easy, so I used Permatex #2 to seal mine.
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Old 09-27-2007, 03:55 PM
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if you want to change the fluid .... all the fluid, you would need to tap into a trans cooling line and have a recovery tool/machine (can not remember the name) but most quickie oil lube places have them. And get the entire system flushed and fluid changed. Dropping the pan only changes about 3 1/2 quarts, and leaves the fluid in the converter untouched......
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Old 09-27-2007, 09:31 PM
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Trans

You're wasting your money by having the trans flushed now. That's preventative maintenance. Changing the fluid won't help the problem you describe. Pay a pro to rebuild it or buy a rebuilt. Completely rebuilding a cooked trans is a job for a pro. If money's tight, put in a good used one and change the oil and filter in it before you use it.
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