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Old 07-06-2013, 01:57 PM
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Low end miss or pinion angle

1962 Chevy Impala. From a standing start I get a "fish bite"....shutter upon acceleration. Tried power braking and *** seems the engine might be missing when I feed it gas. Other than this the car runs great. Don't know if there is something in the initial engine timing or the pinion alignment. Currently it is set at 3* to match the engine angle. Any suggestions?

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Old 07-06-2013, 03:55 PM
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Originally Posted by daveblasingame1 View Post
1962 Chevy Impala. From a standing start I get a "fish bite"....shutter upon acceleration. Tried power braking and *** seems the engine might be missing when I feed it gas. Other than this the car runs great. Don't know if there is something in the initial engine timing or the pinion alignment. Currently it is set at 3* to match the engine angle. Any suggestions?
Matching pinion angle to trans angle (3* up bubble for pinion, 3* down bubble for output shaft) will work well under light power applications. Under extreme power applications such as you are suggesting, the pinion will climb the ring gear and there will no longer be a parallel match between the trans and the pinion. The looser the suspension (parts worn out), the worse the difference between the trans and the pinion can be. It is possible to begin breaking parts if you don't correct the problem.

After getting the whole mess under control with new parts and tightening up the suspension, I would change the pinion angle to zero or 1 degree up bubble, so that under power, the pinion would climb a little and zero out the two angles.
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Old 07-06-2013, 10:19 PM
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Quote:
Originally Posted by daveblasingame1 View Post
1962 Chevy Impala. From a standing start I get a "fish bite"....shutter upon acceleration. Tried power braking and *** seems the engine might be missing when I feed it gas. Other than this the car runs great. Don't know if there is something in the initial engine timing or the pinion alignment. Currently it is set at 3* to match the engine angle. Any suggestions?
You sure you don't have broken motor and/or tranny mounts?
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