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Stiff shifting when hot!

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Old Jun 18, 2023 | 05:59 PM
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From: SUFFIELD CT USA 2023 C8 CORVETTE UN-MODIFIED FINALIST
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Default Stiff shifting when hot!

I have a '77 4 speed stock tranny but 383 stroker with Ram clutch. On hot days when the car gets to op temp the tranny is very noticeable harder to shift, goes back to normal after cool down ? Your thoughts ?
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Old Jun 18, 2023 | 07:26 PM
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Oil type?
I use STA LUBE 90 wt in Super T10's and Muncies
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Old Jun 18, 2023 | 08:13 PM
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Old Jun 19, 2023 | 07:59 AM
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Yup, what gear oil are you running? Try something else. My 77 manual does not act this way.
And I to have a RAM clutch.
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