RE: The rest of the brakes/drums story.........(long)

From: Bernd D. Ratsch (fasstdak@hotmail.com)
Date: Wed Apr 13 2005 - 19:58:09 EDT


Rear diff noise sounds like the actual differential gears either worn or on
their way out.

On the warped rotors...very possible (wouldn't be the first with the Dodge
brake rotors).

The "swoosh" noise can be either a warped pad, out of adjustment pad(s), or
warped drum.

- Bernd

-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Dan Kramarsky
Sent: Wednesday, April 13, 2005 6:30 PM
To: dakota-truck@dakota-truck.net
Subject: DML: The rest of the brakes/drums story.........(long)

ok. here's the whole story behind the brakes & drum question (long):

( i sent this to ray block already, and got his input. now i need the rest
of the gangs help on this one )

FIRST SYMPTOM:
i have a vibration or more accuratley a "drone" sound coming from the rear
of truck at high speeds. if I go to 90mph it gets loud and sounds like its
related to
wheel speed and not the engine rpm. if i slow down to about highway speed
(55) it goes away.

i did a test where I went to 90mph and shift to neutral and let engine
return to idle ( about 600rpm ) all while coasting at 90mph. then the
truck naturally
slows down and the drone sound changes pitch. it gets lower in tone as the
truck is slowing down.

also while in neutral, and at 80+ mph, i did a test where I reved the engine
a few
times just to be sure the vibration was not engine related. the vibration
did not
match the engine rpms.

SECOND SYMPTOM
i also have some slight pulsing in the brakes when i stop. ( probably a
warped front disc right? )

THIRD SYMPTOM
i also noticed that if i jack up both rear tires and gently turn one of the
wheels* I can hear very faint "swooosh" sound coming from the drum on
driver's side. the
"swooosh" occurs once each revolution of wheel. the passenger side doesnt
make any
sounds.

* i dont have limited slip

so, after reading all that, does anyone want to chime in ?

-dan

Dan K.
'92 Grey Dak CC, 318, 4x2, 46RH, 3.92 rear, 235/75R15, PS, PW, PB, PL, AC.

Mods: Trans-Go, APS Precision's 2400 stall, cool air induction, K&N oil &
air filter, Autolite 3924s, & re-located IAT.

Future: 180* stat, MP PCM ( when Premium gas gets cheaper )

                
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