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-   -   Crap, th350 emergency (https://classracer.com/classforum/showthread.php?t=86776)

Mark Yacavone 02-21-2024 12:28 PM
Re: Crap, th350 emergency
 
Yes , when racers tell you you should have the converter cut open and cleaned and inspected , they are certainly correct.
However, you can take a chance,by not doing so, in your situation.
Most of the long term fine debris in a converter, ends up around the overlap, where the weld seam is, due to centrifugal force . That's probably not going anywhere.
It there's anything recent in there, it's possible to flush it up.

First thing you should do is set it on the bench and place a clear plastic tube all the way in and down to the pilot area. Siphon the remaining ATF out over the edge of the bench.
Then, if you have a parts cleaner, with fresh, clean solvent in it, place the tube all the way in and let it run for a while.
If you don't have that available, then pick up a gallon of mineral spirits and pour in as much as you can. Place a T350 input shaft in the unit and spin the turbine back and forth to stir up the fluid. Then quickly dump what you can into a clean pan. Finish by siphoning out the remainder of the solvent.
Then blow it out thoroughly , best you can .
If you haven't found a big chunks by now, you'll probably be okay, assuming the bearings and thrust washers aren't falling apart.

Disclaimer...You heard this from my ghost writer. Not from me.

JP1738 02-21-2024 12:45 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by 1320racer (Post 694008)
Dawson, based on your bolded comments above, I'd reinstall it and go race. Then change the fluid again after Gainesville. I've done the same numerous times over 3 decades without issue. I'm not a believer of cutting open converters to clean or "freshen". My converters only go back to the manufacturer if broken. Put a magnet in the pan if you already don't have one in there.

Who's converter are you running and what does it flash to and fall back to on the shift?
I had not considered running it and then changing the fluid, that's a fabulous idea and would help give me piece of mind. I don't know the converter brand, but I'll post a picture of what was stamped on the top and bottom of it so maybe someone will recognize it. The pan has a magnet, I'll make sure to clean it well and put it back when it goes back together. It's really hard to tell what the converter clashes to. The brakes aren't good enough to flash it in the pits, and first gear is so short I'm not sure what it goes to right off the line as the rpms climb so quickly. Looking back at in-car camera footage, it appears to flash around 4600 and fall to 5000-5100 on both gear changes. That was with the original intake that was on the car though, I don't have data on the new one yet, and it definitely made more power with it.

https://i.imgur.com/WcHGMXU.jpg

https://i.imgur.com/JW0x09F.jpg

Glenn Briglio 02-21-2024 01:09 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by JP1738 (Post 694012)
I had not considered running it and then changing the fluid, that's a fabulous idea and would help give me piece of mind. I don't know the converter brand, but I'll post a picture of what was stamped on the top and bottom of it so maybe someone will recognize it. The pan has a magnet, I'll make sure to clean it well and put it back when it goes back together. It's really hard to tell what the converter clashes to. The brakes aren't good enough to flash it in the pits, and first gear is so short I'm not sure what it goes to right off the line as the rpms climb so quickly. Looking back at in-car camera footage, it appears to flash around 4600 and fall to 5000-5100 on both gear changes. That was with the original intake that was on the car though, I don't have data on the new one yet, and it definitely made more power with it.

https://i.imgur.com/WcHGMXU.jpg

https://i.imgur.com/JW0x09F.jpg
Easy way to flash convertor. After a run on return road stop car and put in high. Floor throttle and watch tach for highest reading.

dragracerray 02-21-2024 01:35 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by Glenn Briglio (Post 694013)
Easy way to flash convertor. After a run on return road stop car and put in high. Floor throttle and watch tach for highest reading.
I agree with Glenn. I think it is a little easier on the converter and trans if you mat the gas in high gear from a 10-15 MPH roll instead of stopped. Ray

JP1738 02-21-2024 01:58 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by Mark Yacavone (Post 694009)
Yes , when racers tell you you should have the converter cut open and cleaned and inspected , they are certainly correct.
However, you can take a chance,by not doing so, in your situation.
Most of the long term fine debris in a converter, ends up around the overlap, where the weld seam is, due to centrifugal force . That's probably not going anywhere.
It there's anything recent in there, it's possible to flush it up.

First thing you should do is set it on the bench and place a clear plastic tube all the way in and down to the pilot area. Siphon the remaining ATF out over the edge of the bench.
Then, if you have a parts cleaner, with fresh, clean solvent in it, place the tube all the way in and let it run for a while.
If you don't have that available, then pick up a gallon of mineral spirits and pour in as much as you can. Place a T350 input shaft in the unit and spin the turbine back and forth to stir up the fluid. Then quickly dump what you can into a clean pan. Finish by siphoning out the remainder of the solvent.
Then blow it out thoroughly , best you can .
If you haven't found a big chunks by now, you'll probably be okay, assuming the bearings and thrust washers aren't falling apart.

Disclaimer...You heard this from my ghost writer. Not from me.
Thank you Mark Yacavone's ghost writer, I will do this tonight before reinstalling my transmission and converter.

Eman 02-21-2024 05:34 PM
Re: Crap, th350 emergency
 
At the least flush out or replace the cooler, that is where debris can be found. Buy a couple of neodymium magnets and put them in the pan in the future.

Kingpen 02-21-2024 11:18 PM
Re: Crap, th350 emergency
 
Sure looks like an ATI number on pilot ,you should call and talk to Charlie Plott,he can tell you for sure…..Victor Penrod

Mark Yacavone 02-21-2024 11:58 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by Kingpen (Post 694051)
Sure looks like an ATI number on pilot ,you should call and talk to Charlie Plott,he can tell you for sure…..Victor Penrod
Yup, and looks like their cover.They aren't really billet, but cast and machined.

Bill Harris 02-22-2024 06:33 PM
Re: Crap, th350 emergency
 
It looks like you are in Charlotte, Ultimate Converter Concepts is right up the road in Cornelius, NC. 704 892 6880

jim reynolds 02-22-2024 06:52 PM
Re: Crap, th350 emergency
 
Quote:
Originally Posted by tstickff (Post 693794)
Big Head I mean Big Ed…you have officially reached a new low…as in low life, your a real POS, picking on a kid racing his first ever stock divisional and having issues. And you’re here giving him **** like you do every single post on here. I think you are real trash and a big mouth. I bet when you first started racing you were perfect, even tho you havnt done a thing yourself in decades, just stop! Go polish the wheels for your son it’s probably all you’re actually good at, or maybe use your mouth for polishing some knobs I’m sure your perfect at that too!
this Needs a LOVE button!!!


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