Thumping Sound, Kick, Deceleration Jerk

[JokerElite]

Originally Posted by andrewwynn

Lots of what you described sounds like subframe bushings. Especially freeway thump from the rear.

Example: a distinct thump if on power up hill and hit a bridge expansion bump. Every time I'll get a thump that feels like a gear slipping a tooth. E.g. Instantly loose power and get it back.

The twist of the subframe does exactly that: for a split second when the car gets light on the spring power goes to twisting the subframe not pushing the car forward.

I also get a creak every time I start accelerating from zero as the subframe twists.


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It happens even on smooth roads. But I'm assuming its drivetrain related because it sounds rotational. I'll try to have a look at the subframe bushings as well.

Originally Posted by crystalworks

How many miles are on the truck? If over 100,000 then it's likely a driveshaft servicing is in order. I did both guibos and my CSB as well as greasing the splines on the shafts. Solved some noise issues I was having.

Note: your clunk sounds more like a rear bushing, just suggesting the above as part of maintenance.

About 146k. This is good to know. Might go this route if I can't find an issue. Did you change auto/diff/tc fluids on yours? I was thinking of it but have been reading mixed results.