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Old Mar 3, 2009 | 12:30 PM
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zak8tac
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NP435 Rattle

I have a 1976 f-250 with a NP 435 in it. I have a horrible rattle when hard accelerating but it only happens in 3rd gear, and it doesnt do it decelerating. All the rest are nice and quiet. It doesn't kick out of gear, and it shifts into gear nicely. Anybody know what this is? My driveshafts are all balanced and good u-joints.
 
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Old Mar 5, 2009 | 12:43 AM
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Sounds like a bearing, that's my WAG....

google search for 'transmission rebuild kits' and find:

Ford Pickup Truck Manual transmission parts, quality rebuild kits and overhaul parts - Drivetrain.com

And others.
 
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Old Mar 22, 2009 | 11:24 PM
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Originally Posted by zak8tac
I have a 1976 f-250 with a NP 435 in it. I have a horrible rattle when hard accelerating but it only happens in 3rd gear, and it doesnt do it decelerating. All the rest are nice and quiet. It doesn't kick out of gear, and it shifts into gear nicely. Anybody know what this is? My driveshafts are all balanced and good u-joints.
Same here, mine does the same thing and it's been doing it forever.
 
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