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Old 09-18-2006, 07:37 AM
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TH350 - Not Going Into Gear

The TH350 I installed behind my 350 SBC is not going into gear. Just got the engine started this weekend for the first time and tried to shift the trans to see if it would go into gear once I had the cam broken in. I have a new vacuum modulator on it which is hooked to the vacuum tree on the intake.

The trans was picked up second hand and has been sitting for two years that I know of. The internals were clean when I changed the filter prior to installation. I filled the converter with one quart of fluid prior to installation.
Was that enough? Could the modulator need adjustment?

The trans is connected to a column shift linkage via a Lokar gear selector shaft which is moving the selector shaft as prescribed.

Any suggestions as to possible fixes I might try before dropping the trans out for a full rebuild would be welcome.

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Old 09-18-2006, 09:21 AM
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Check out this thread from a week or so ago...
Used th400 not working
You have the same problem... Not enough fluid.
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Old 09-18-2006, 09:54 AM
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One quart in the converter to startup is fine, but you still have about 10 more quarts to go. Start it up, ck the stick, keep adding until "full", then run through the gears, ck again, fill if necessary.
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Old 09-18-2006, 10:54 AM
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Mine took a little over 8 from dry to full with a mid sized converter. You also need to be carefull not to overfill it. Hopefully you didnt damage the pump running it dry during the cam break in. Im not a tranny guy so maybe it wouldnt hurt it
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