24.04.2015, 20:56
Guten Tag
We are reworking a 78 Corvette Rear from 3:70 to 3:36 , plus tuning it.
Gary is doing the rebuild and here is a quote from him on bolts that attach the Ring gear.
"Here I countersunk the posi case ring gear holes. You see in picture#1 that the holes are square edged and the stock bolts work with that but not the ARP's. The ARP's have a larger radius under the head for more strength and have the shoulder on them like the old GM bolts did. [B]Somewhere around 1977 they changed to the bolts that were in here before, shorter, no shoulder, and not loctited in place. Not good, many backed out in use sometimes within the factory warranty period. QC with the late 70's vettes wasn't as good as the earlier cars but that is probably the case with most lines of the period."[/B]
Stock bolts vs ARP's Stock on right
Before milling notice flat surface
Counter sink
Cut
Polish
Perfect fit
We are reworking a 78 Corvette Rear from 3:70 to 3:36 , plus tuning it.
Gary is doing the rebuild and here is a quote from him on bolts that attach the Ring gear.
"Here I countersunk the posi case ring gear holes. You see in picture#1 that the holes are square edged and the stock bolts work with that but not the ARP's. The ARP's have a larger radius under the head for more strength and have the shoulder on them like the old GM bolts did. [B]Somewhere around 1977 they changed to the bolts that were in here before, shorter, no shoulder, and not loctited in place. Not good, many backed out in use sometimes within the factory warranty period. QC with the late 70's vettes wasn't as good as the earlier cars but that is probably the case with most lines of the period."[/B]
Stock bolts vs ARP's Stock on right
Before milling notice flat surface
Counter sink
Cut
Polish
Perfect fit