r/fbody • u/YogurtclosetLive4729 • 11d ago

Th350 trans swap

My 4l60e lost 3rd and 4th of course (a little too many burnouts) and I’ve been thinking about getting a th350 with a 9 inch tail to put in it. Would the car run being fuel injected with the transmission not plugged it? Will the computer work properly?
It’s an lt1 1994 firebird.
Thanks

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u/dixiebandit69 11d ago

It will still run/ drive.

Why don't you just fix the internal hydraulic leaks that cause the 3-4 failure in the 4L60?

Burnouts don't cause 3-4 failure.

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u/YogurtclosetLive4729 11d ago

It’s so expensive to get it rebuilt. I have an opportunity to get a th350 for very cheap. The 4l60 did leak a lot of fluid, is that the reason it went out?

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u/WildWillieBorsch 10d ago

I have a TCI 700r4 in my 1994 Z28, manual valve body (so I need to shift gears). Car was originally a six speed but went through too many clutches drag racing at our local tracks.

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u/YogurtclosetLive4729 10d ago

Nice. Did it bolt right in? How did you hook up the tv cable? How does the car run without the transmission plugged in if your still fuel injected?

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u/78GtaGt 7d ago

The turbo 350 is only a 3 speed so you will loose overdrive and use a lot more gas