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Old 09-07-2008, 12:56 PM
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First time rebuilding T-350 questions

Hello to everyone here :-)
I am rebuilding my TH350 and it is my first transmission I repair ever
I followed three books to disassemble it (Haynes, ATSG and Ron Sessions), no problem so far ... until i got to the valve body ... I removed all valves but manual low control valve the retaining pin does not move at all ... the plug is moving in and out freely. See picture.
I would appreciate your help on showing me how to remove it.

Also, I read that TH350 should be filled with Dexron II. Unfortunately I can find only Dexron III here, I am from Bulgaria and automatic transmissions are relatively rare :-)

Thank you very much,
Ivo
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Old 09-07-2008, 02:10 PM
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IF you have compressed air ... use an air gun and push on the plug while blowing air at the end of the pin.

No compressed air? Turn the v-body upside down... bang the v-body "lightly" on the work table while pushing in & out on the plug to force the pin to fall out.

Dexron II or III are the same basic fluid. It all works fine.

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Old 09-07-2008, 02:24 PM
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Hi Crosley,
Thank you for your fast reply.

I have compressed air :-) I will try it.

I tried the other way you described with no luck even with not so "light" bangs
I also used some cooling spray (should release stacked bolts and nuts), it comes out around the pin but it does not move at all.
Thank you,
Ivo
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Old 09-09-2008, 12:02 PM
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It is out
Crosley, thank you for the help the compressed air worked out

I have another question.
I have 1 liter of Dexron II, I plan to use it to soak parts in it.
Then I will fill the transmission with Dexron III.
Do you think it would cause any problem?
Also, how long the transmission could stay assembled but not filled up?
I have to wait or some parts to arrive one or two weeks...
Thank you,
Ivaylo
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Old 09-09-2008, 12:29 PM
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Dexron II and Dexron III will mix without issue. The III superceedes the II and will work in all applications requiring I, II, or III.
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Old 09-11-2008, 12:11 PM
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Quote:
Originally Posted by sbchevfreak
Dexron II and Dexron III will mix without issue. The III superceedes the II and will work in all applications requiring I, II, or III.
Why not use the latest fluid which is DEXRON VI? This fluid is much improved compared to DEXRON III.
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Old 09-15-2008, 11:36 AM
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Hi The Factory Man,
Thanks for advice, but I found Mobil ATF220 (Dexron II) at very reasonable price some $7,50 per liter

Does anyone know for sure how many liters TH350 would take to be full?
I read it should get about 10 liters. Is it correct?
Thanks,
Ivo
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Old 09-15-2008, 12:16 PM
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Hi,

10 1/2 qts/liters that's including the stock torque converter + your cooler.
Rich
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Old 09-20-2008, 11:02 AM
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Hi guys,

Thanks Rich.

I have another question.
I got my rebuild kit but some of the clutches, tow actually, got some dents during the shipping see pictures.
Can I use them or I have to order new clutches?
Also, I am in Bulgaria, so clutches are not widely available and I have to order them from USA can I use two of my old clutches as last resort?

Thank you,
Ivo
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Old 09-20-2008, 09:08 PM
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Keep us posted. I did my first one last year and am waiting to finish the rest of the car to to see if it works. The only real problem I had was with the anti clunk. The book I had did not have a good picture. But someone on here posted one for me.
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Old 09-21-2008, 12:03 AM
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Ivo,
I wouldn't use those clutches because I believe they will continue to deteriorate & cause a problem.

How do the old clutches compare to the good new ones? you can
use them, but I myself don't like doing the same job twice,
does it take a long time to get parts from over here?
Rich
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Old 09-21-2008, 01:23 AM
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Rich is right. Trans Shops do it all the time. Some prefer good used/seasoned clutches & bands as long as they're in good shape. If they're dark/discolored from overheating or severely worn don't reuse them.
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Old 09-21-2008, 06:29 AM
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Hi guys,
Thank you Rich and SSedan64 for your valuable replays.
I checked the old ones, and I think they are not usable. See pics.
Also, the TH350 was burnt (may be by me ) as I did not know anything about automatic transmissions before.
The car was not driven for at least 10 years and when I start it I made some 10 km and it stopped running forward.
When I open the transmissions the Forward clutch pack was burned.
I am going to order new clutches, It takes some 15-20 days to get them.
Thanks again,
Ivo
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Old 09-21-2008, 11:25 AM
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Ivo,

Those clutches aren't reusable.
while you have this apart be sure to flush the lines, torque converter, & cooler.

it only takes a minute piece of dirt to cause a problem. especially in the valve body & TV valve.

As for the ATF Mobile 1 synthetic is for all GM transmissions
from 2005 back.
Rich
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Old 09-22-2008, 06:59 AM
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Hello Rich,
Thank you for your help, I hope everything will go well
I have new (rebuild) torque converter, I will not use the old one. I am taking apart everything and deep it in solvent.

I noticed something strange though...
The transmission has got only four friction plates in forward and low-reverse, but the books I have (Haynes, Ron Sessions and ATSG) said there should be five. Also the rebuild kit I bought contains five of each.

Should I install four frictions as it was or should I follow the books directions?

Thank you,
Ivo
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