Loud 'thunk' under hard shifting
Apr 24, 2003, 11:58 PM
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Loud 'thunk' under hard shifting
I test drove an Evo the other night and shifted hard a few times. About 85% of the shifts produced a loud "thunk" from the rear of the car. At first I thought it might have been something loose in the trunk but after it happened again, I asked the salesman about it. He said that it was a normal sound that the rear diff makes. Is he right or was there something wrong with the tranny? The car had 587 miles on it. Btw, I was impressed by how hard the car pulled with 4 passengers (~730 lbs)! Coming from an S2000, that torque is really noticeable. 
Apr 25, 2003, 07:59 AM
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It's a normal thing for any AWD car... It's a mixture between the drive-shaft and the rear diff.... When you shift hard and don't let off the clutch at the same time with the gas, it makes that noise.. You gotta time it perfect during really hard shifting in order not to get that... Takes practice, it'll go away when you get better...
Apr 25, 2003, 08:18 AM
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You need practice with your hard shifting technique. That sound is from the rear diff being shocked. I've heard it a few times in my car.
SC~
SC~
Apr 26, 2003, 03:09 AM
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Originally posted by o00o
it is normal cause it is awd so the power kinda has no where to go so it puts strain on the tranny so dont do it
it is normal cause it is awd so the power kinda has no where to go so it puts strain on the tranny so dont do it
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Apr 26, 2003, 02:26 PM
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Originally posted by evos2k
Oh ok. So I guess I'm just supposed to granny shift, huh? Hmm, that'll get me around a track faster, don't you think?
Oh ok. So I guess I'm just supposed to granny shift, huh? Hmm, that'll get me around a track faster, don't you think?
-N
Apr 26, 2003, 05:11 PM
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mine does the same thing, and i have a thread about it in the drivetrane section. i was told by the main evo rep from orlando it was a rear pillow bushing that holds the rear lsd diff. to the chassis. when it makes the thud, it is just hitting the final end and stops creating the thud. he said its done it on every evo. i asked if i should just drive it not as hard he said... and a quote " this car is made to drive hard, we know every one who buys the evo is buying it to give it hell. so drive it as hard as you want, it wont break." i may have missed a few words or two, but thats about the jist of it.
Apr 27, 2003, 12:59 AM
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My experience has been that the EVO doesn't like to be SHIFTED hard. The stock gear selector has fairly short throws and the clutch travel is short as well, so smooth shifting is fast. smooth mythodical shifts can be performed quickly with practice.
Apr 27, 2003, 08:59 PM
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DO NOT SHIFT HARD....
shift smooth and fast
If you shift it with the expectation that the wheels will break loose in a wild AWD burn out, you can kill that fantasy right now. you have WAY too much grip with the AWD to think about doing that.
You have to remember in your old school 2WD car hard shifting results in the tires breaking loose. Not gonna happen now. All the torque that used to break the tires free are now getting taken up in the drive line.
Let the clutch do it's job and slip it a bit while accelerating hard. Remember, it's easier to replace the clutch than the gears in your transmission.
may the boost be with you.
shift smooth and fast
If you shift it with the expectation that the wheels will break loose in a wild AWD burn out, you can kill that fantasy right now. you have WAY too much grip with the AWD to think about doing that.
You have to remember in your old school 2WD car hard shifting results in the tires breaking loose. Not gonna happen now. All the torque that used to break the tires free are now getting taken up in the drive line.
Let the clutch do it's job and slip it a bit while accelerating hard. Remember, it's easier to replace the clutch than the gears in your transmission.
may the boost be with you.
Apr 27, 2003, 09:38 PM
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thank you some one else heard it too, all these guys say its cuz of the AWD but i have had 2 AWD cars and i beat the hell out of both, they did not do that i think i would of noticed a thud like that. It is more like a loud bang in the Evo,i seethat some one said dont shift hard well let me tell ya a little something for 35G's im gonna shift hard as a motherfu**er and that bang would make me sick and make me wanna thow the keys back at the sales person and politly say KEEP IT! 
and no guys im not jealous of the Evo
and no guys im not jealous of the Evo
Apr 28, 2003, 10:39 AM
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Hey Juiced.....Your post makes you sound like a fool.
Going fast isn't about shifting hard....it's about shifting fast and smoothly. That has nothing to do with granny shifting at all.
Doing stupid things in a car, regardless of price, will cause failures. Those failures caused by a persons stupidity or lack of skill are no reason to give back a car....or reason to not buy a car.
Going fast isn't about shifting hard....it's about shifting fast and smoothly. That has nothing to do with granny shifting at all.
Doing stupid things in a car, regardless of price, will cause failures. Those failures caused by a persons stupidity or lack of skill are no reason to give back a car....or reason to not buy a car.
Apr 28, 2003, 05:22 PM
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i am sorry master. 
its no reason not to buy the car!,come on if i bought a vett i would get on it once and a while and if my tranny banged i would not buy it sorry and i think the Evo is the vett of the import world right now.
its no reason not to buy the car!,come on if i bought a vett i would get on it once and a while and if my tranny banged i would not buy it sorry and i think the Evo is the vett of the import world right now.