2009 Escalade ESV, strange grinding sound / feel in floor board when taking off from a stop, can replicate the sound by shifting into drive, holding brakes and revving the engine to 1500rpm then the noise happens continuously until i drop rpm below 1500. Anyone have any clues? Just replaced the front diff and drivers CV axle thinking those were the problems but its still happening
[SOLVED] Help! Cant figure out grinding sound/feel
- Thread starter pdxyukon
- Start date
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intheburbs
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I'm confused.
You can recreate the noise by revving the motor without moving, and without the driveline moving, yet you replaced two (expensive) driveline components thinking they might be the cause of the noise?
You can recreate the noise by revving the motor without moving, and without the driveline moving, yet you replaced two (expensive) driveline components thinking they might be the cause of the noise?
mikez71
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Loose starter touching flexplate is my guess.
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I'm guessing that the torque converter is failing.
What @intheburbs said for sure. Makes no sense to replace something that does not move when power braking.
What @mikez71 and @Joseph Garcia said about the noises. When power braking, does it do the noise in reverse? Take belt(s) off and see if the noise is still there?
What @mikez71 and @Joseph Garcia said about the noises. When power braking, does it do the noise in reverse? Take belt(s) off and see if the noise is still there?
lol, def lugnuts
First thing I thought about was motor mounts but it has electric fans.
Metallic milkshake fluid and chunks of metal is why i did the diff, cv axle had play so assumed it was that, (stupidly) didnt try braking and revving until after I had swapped those 2 and noise was still present, ended up being the top 2 motor mount bolts missing
Yea, as my other post said, I thought of mounts first but then it made no sense to me because of electric fans and no fan blade rubbing a shroud. Maybe the noise was exhaust related with pipes/manifold flexing? Hard to imagine that, especially with just the top bolts missing. The rest had to be loose.
If there was recent/localized work done in the engine compartment area, this is another example of incomplete info from the OP. If no work done, then why did the bolts come out?????
Glad You Checked Mounts !!
You were right, I had got under to check the diff again and saw through the cracks the mount was missing top 2 bolts on drivers side
Still unsure how original bolts were missing, Ive had it for 2½ years saw on the carfax it had mounts done a year or so before I bought, whoever did the mounts got lazy and didnt even put the heat shield on I'm guessing the lazy a** either didnt torque to spec / didnt throw some blue loctite on them or didnt do either. Thanks all for input/help
