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Old 03-16-2011, 05:18 PM
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TH350 been outside for 15+ years, Thoughts?

So, ive been wanting to replace my old and tired 4L60E with a TH400. I thought i had a BOP TH400 sitting in the backyard beside my LeMans

I went outside and looked, Turns out its a BOP TH350.

Well, this trans is out of a 1970 Pontiac 2+2, Trans worked great when my dad pulled it 20 years ago.

I pulled the dipstick and its nice and red, doesn't look burn and smelled fresh.

Trans had been sitting outside for 15+ Years.

What would you guys do to spruce this baby up? Im thinking pull the pan, replace filter, TransGo Shift Kit, New pan gasket, and maybe an aftermarket pan.

Would you guys be leary to use this?


EDIT: Would be going behind a Mild 350 with about 350HP. and would be getting a 3500 Stall.

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Old 03-16-2011, 05:27 PM
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Putting a shift kit in a trans that has been setting so long is like putting on new shoes with dirty socks.
The seals could be pretty hard by now after setting,wich can cause slipping and heating up, thus frying clutch packs and adding a shift kit would probably accelerate its destruction.It is my opinion only,do what you like.
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Old 03-16-2011, 05:32 PM
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Quote:
Originally Posted by latech
Putting a shift kit in a trans that has been setting so long is like putting on new shoes with dirty socks.
The seals could be pretty hard by now after setting,wich can cause slipping and heating up, thus frying clutch packs and adding a shift kit would probably accelerate its destruction.It is my opinion only,do what you like.
so, lets say if i just left it stock, replaced the filter and ATF. Do you think it would hold up?

If not, i can get a rebuilt TH400 for $580, but i figure why not try to use this if i can.
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Old 03-16-2011, 05:43 PM
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Quote:
Originally Posted by FastOrange
so, lets say if i just left it stock, replaced the filter and ATF. Do you think it would hold up?

If not, i can get a rebuilt TH400 for $580, but i figure why not try to use this if i can.
If money is tight you could try it. It is a crap shoot in my opinion.It may work well, it may work till warmed up, it may not work at all.
If the fluid doesnt look to bad Iwould rebuild it and put it in with the shift kit.
If money is the problem and you have time,You could put it in. I would have to be pretty hard up to put it in myself,That is a call you will have to make. Like I said it is a crap shoot at best.JMHO
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Old 03-16-2011, 06:14 PM
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Quote:
Originally Posted by latech
If money is tight you could try it. It is a crap shoot in my opinion.It may work well, it may work till warmed up, it may not work at all.
If the fluid doesnt look to bad Iwould rebuild it and put it in with the shift kit.
If money is the problem and you have time,You could put it in. I would have to be pretty hard up to put it in myself,That is a call you will have to make. Like I said it is a crap shoot at best.JMHO
the fluid looked great, almost new, it was a nice bright red, not brown and smelt like fresh fluid.

Im sorta hard up for cash ATM, im only 19 and got bills to pay.
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Old 03-16-2011, 07:30 PM
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The fluid should look clean, it's been sitting for 15Yrs. All the sediment/crud has settled to the bottom of the Pan.
If you must use it like it sets, change the Fluid & Filter and all the external seals, Overhaul/Seal Kit is about $30, it will include all the seals.
Example, Part# 44002A >> http://www.makcotransmissionparts.com/350-350C.html

Local Trans Supply Shop will have these as well.
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Old 03-16-2011, 09:52 PM
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Quote:
Originally Posted by SSedan64
The fluid should look clean, it's been sitting for 15Yrs. All the sediment/crud has settled to the bottom of the Pan.
If you must use it like it sets, change the Fluid & Filter and all the external seals, Overhaul/Seal Kit is about $30, it will include all the seals.
Example, Part# 44002A >> http://www.makcotransmissionparts.com/350-350C.html

Local Trans Supply Shop will have these as well.
Basically thats what i was thinking, I hoping to stab this in for a couple months and save up some cash for a rebuilt unit.

Im gonna pull the pan tomorrow and check out if there is an corrosion and see how bad the bottom of the pan is.
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Old 03-17-2011, 09:50 PM
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Give it a shot, if it seems to work ok then put the kit in it. Give you an excuse to take the valve body out and clean it up a bit.

Good luck-

K
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Old 03-17-2011, 09:56 PM
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Put the trans on blocks right side up to start with .

Make sure you remove the pan before you turn the trans upside down . You don't want to dump that 15 yrs of sediment into the trans .
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Old 03-18-2011, 01:34 PM
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Im not gonna use this trans now, I found a TH350 with a 9" tailshaft (Same length as my 4L60E) at a local autowreckers, suppose to be VERY low miles (Like under 30,000), was behind a 350 Diesel, so its a BOP case.
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