!@#$%^ &*()?!
- Thread starter MrSony
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I'll check the clearance, but what perplexes me is that it worked perfectly fine just a week ago, then all of a sudden not. One would think if it didn't index with the pump it wouldn't have worked at all. Theres no way for the TC to move once it's bolted up.
If it worked fine before you installed the engine that usually indicates a mistake by the installer, which is something most of us have done and in my case more than once.
It worked fine when the engine was running is what I'm getting at. As in, I put the engine and trans in as of Thanksgiving weekend. Drove it around that following monday. Drove it around last Thursday, and now it don't work. Nothing has changed.
This is especially important in older TH350/400 transmissions - pump engagement is easily lost if the converter to pulled too far forward; too tight inward and you will kill the pump. The rule of thumb is 1/8" to 3/16" - this allows for thermal expansion and rearward thrust of the crank, and flex plate movement. Hell, when I put the wagon and TBSS together I used between 0 and .189" of shims to get the tolerance correct - both are 4L60E-type transmissions with differing convertors and flex plates. Attention to detail is paramount to success in this hobby - ignorantly slapping sh*t together is a good way to end up mad at yourself.
I misunderstood, I thought it worked until you dropped in the current engine. If it worked for a while with the current engine and then stopped working it's the internals of the transmission that failed and you won't know what caused it til you remove the transmission and break it down.
Don't transmissions normally have symptoms or signs? It never slipped before, always shifted crisp and firm, leave it for a week, go to move the car, and it barely works.
It was working but there's a lot of things we don't know. As mentioned, 30 year old seals can let go. The converter could have been slipping some and generating excess heat. It doesn't take much heat very long to cook an already somewhat hardened seal. Shut it down hot, let it sit, seal leaks. if you're frustrated maybe let it sit a couple days when you can look at it objectively. You have spent the money for a 315 hp motor and a grand for a 8.5 rear so you're most of the way there. It's a setback but you're closer than a lot of us.
the Internet has lots of posts about a TH350 suddenly failing without any warning. How old was the transmission?
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I have no idea. I got it from a guy, decent guy, a year ish ago. Gave it a guarantee and gave me a pan gasket, filter, and a few kickdown cables. And the converter for $125 bucks. I've had it since October of 2016. The trans itself has gotta be from the 70s at least.
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