**2005 E500 Transmission jolt when going downhill

AMR

MEMBER
2005 MERCEDES BENZ E500
V8
2WD
AUTOMATIC
80,000 MILES

I recently purchased a 2005 E500 with approx. 80K miles on it. I feel a "jolt, " that seems to come from the transmission, every time I go downhill, which is whenever I leave my house. The severity of the "jolt" depends on the speed. What could be causing this?

5 Replies

RIVERMIKERAT

MECHANIC
6,110 POSTS

Bad motor mounts. Bad u-joints. When you feel the "jolt", what sort of input are you giving the vehicle? Braking? Throttle? Idle? Do you have any vibrations at other times?

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Monday, July 18th, 2011 AT 2:07 AM

AMR

MEMBER
3 POSTS

Definitely if I'm not braking while going downhill. It's much milder if I'm braking. I just took the car out for a test drive, where I put the transmission in neutral, and there was no jolting at all.

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Monday, July 18th, 2011 AT 3:48 AM

RIVERMIKERAT

MECHANIC
6,110 POSTS

It sounds like it could be u-joints. But these will usually also announce themselves on the freeway, when you start accelerating or decelerating. Check the motor and transmission mounts. Check to be sure nothing in the trunk is rolling around.

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Monday, July 18th, 2011 AT 4:04 AM

AMR

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3 POSTS

No issues when accelerating or decelerating. Nothing in the trunk. Will need to check the engine and transmission mounts. Could it be that the transmission needs to be readapted or the transmission fluid is low?

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Monday, July 18th, 2011 AT 4:16 AM

RIVERMIKERAT