Posted by Dick2 on May 06, 2016 at 10:56:16 from (184.101.30.75):
In Reply to: Re: Cummins swap ? posted by 4520BW on May 06, 2016 at 10:18:35:
The AC transmissions could be made to be a bit more reliable by following the service recommendations that were issued in the late 60's. It was discovered that the shafts of the transmission were flexing and that reduced the gear teeth contact area and caused failures. The shaft flexing could be reduced by pre-loading the tapered bearings more than the original pre-load specifications. Then the transmission would hold the gear teeth contact better. However, not too much extra HP could be put through the transmission without causing failure. If the bearings were preloaded to the new specifications, the transmission could probably handle 10 -15% more HP; more than that is pushing your luck.
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