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Old 09-28-2009, 08:16 PM
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350 rebuild not as firm as before - Why?

Just finished a repair on my 350 tranny, and now it drives "softer". Specifically, I had to replace the forward clutch drum and input shaft, so I had things apart down to the planetary.

Before, this truck would chirp the tires in each gear (it has a shift kit). Now it shifts up and down fine, just isn't as responsive. I'm wondering why.

Here are some possible factors. Could any of these be the cause...

1. I replaced the converter. It's just standard, but my old one was a high-stall.

2. The new forward clutch drum is a little "deeper" than the old one. Hence, there is a larger gap between the pressure plate and snap ring than there was before.

3. I did not flush the cooler or lines. When I originally pulled the pan, fluid looked great and there were no shavings, so I didn't see a need.

4. I disassembled the pump just long enough to inspect it. I'm pretty sure I got everything back correctly.

I'm OK driving the truck as is, I'm just curious why it would perform differently when very little was changed. What am I mising here?

Thanks guys, Chad

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Last edited by cbroadway; 09-28-2009 at 09:06 PM.
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Old 09-28-2009, 09:29 PM
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A converter with stock stall speed should shift firmer than one with a higher stall. Possibly too much clearance between clutch plates, Valvebody gasket may be damaged where the bolt wasn't tightened.
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