Rumble when stopping or backign up - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 10-20-2008, 06:33 AM Thread Starter
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Rumble when stopping or backign up

When I stop more quickly than usual the truck starts to knock, or a better description would be a rumble. When I back up its a very heavy rumble, like the motor is shifting and rubbing on something. The mounts appear to be fine. It does not do this in drive. Someone mentioned U joints to me, what do you guys think?
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post #2 of 4 Old 10-20-2008, 08:31 AM
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have you tryed power braking it with someone watching the motor?

1997 F250 XLT CC PSD 4X4 4.10LS E4OD (AB CODE TRUCK)
DFUSER 18K MOD
4" TURBO BACK DI EXHAUST
1705 SUPERCHIP
DIY INTAKE
2" LEVELING
GAUGES,EGT,TRANS,BOOST,OIL TEMP,OIL PRES,WATER,VOLT
SONNAX VALVE/TRICUMULATER SPRINGS
30,000lb TRANS COOLER:
SWAMPS IDM

1996 F250 XLT EC PSD 4X4 4.10LS E4OD
1705 SUPERCHIP
DIY INTAKE
DB EXHAUST BRAKE
30,000LB TRANS COOLER
QUAD POD WITH EGT,TRANS,BOOST,WATER
140V IDM
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post #3 of 4 Old 10-20-2008, 08:46 AM Thread Starter
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nope. but i powerbraked a while ago just messing around and dont recall hearing the noise, ill do that today again to be sure.
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post #4 of 4 Old 10-21-2008, 11:07 AM
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My truck did that when I first put the 3" downpipe on, it only came in contact with the firewall during braking or in reverse. Thats only possible if you have aftermarket exhaust though.
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