DRR Top Comp
| quote: Originally posted by 62Galaxie:
I changed ring/pinion from 4.50 to 5.14 and have had nothing but trouble. At first I thought a tire was out of balance...then the driveshaft was rebalanced and still no relief. The d'shaft was out of round so I went ahead and had a NEW STEEL shaft built but the vibration is still there. It shows up from just after 330' and gets worse from there. Is it POSSIBLE that the NEW ring/pinion is causing this? Car runs 100 mph in eighth.
8.8 am I right? Crush sleeve or solid pinion spacer? Have you re-checked your pinion bearing pre-load after running it? |
| | | Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018 | 
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DRR Top Comp
| quote: Originally posted by 62Galaxie:
Don't know about solid spacer, bearing pre-load or crush sleeve. I will find out about those. It's a 9" with "N" case. RPM at stripe is 6000-6100. New d-shaft (steel) is 3.5 inch diameter and 48.5 " from center to center. I would bet that it's not anything to do with critical speed. All new U-joints too. Again, there was no issue with this until the 5.14 went in. Would a solid pinion spacer cause such vibration?
If you have a crush sleeve or solid pinion spacer that somehow now has the pinion bearing preload loose after making hits on the car, you could have a vibration. Best thing to do is climb under it take the driveshaft out, grab the pinion yoke and see if there's any slop. I wouldn't race it again until I identified the problem in the pinion. |
| | | Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018 |
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