Thread: Differential replacement
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Old 10-28-2009, 01:36 PM
Harley Eaton Harley Eaton is offline
 
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Differential
The Thunderbirds with the 428 engine (Q cars) used a 9-3/8 " rear end. The 390 cars, such as the 1965 used a 9". They also had different number of splines on the axles.
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