Problem for 2006 corolla transmission noisy in gear when car is

I have a 2006 corolla (automatic transmission) with just less than 100,000 miles. Now it is just fall season and it is not cold outside yet. But after I start my car and put gear to D (drive) or back, I can hear noise. But no noise in P or N gear. After a couple of minutes, the noise goes away. Could anyone tell me what the problem might be? The transmission fluid is in normal level.

Thanks a lot in advance.

所有跟帖： 

• 你聽到什麽樣的聲音？ -QYZ- ♂ (0 bytes) () 09/23/2015 postreply 18:53:55

• cranking type of noisy. BTW, I changed transmission fluid one ye -GC_Help- ♂ (138 bytes) () 09/23/2015 postreply 19:03:43

• 是不是剛開始一分鍾有 cranking/grinding noise？開起來有沒有？ -soccer88- ♂ (0 bytes) () 09/23/2015 postreply 20:05:44

• yes, there are noisy only in the first 1 to 2 minutes. And, only -GC_Help- ♂ (148 bytes) () 09/24/2015 postreply 06:18:23

• 建議先查heat shield。這是car talk中的Ray最喜歡回答的問題。 -QYZ- ♂ (130 bytes) () 09/24/2015 postreply 06:49:55

• 首先鑒定噪音來自何處。這個裏程，常遇到軸承，支撐部件磨耗引起的各類問題。 -needtime- ♂ (134 bytes) () 09/24/2015 postreply 03:33:22

• thank you all for the suggestions. Will check those things after -GC_Help- ♂ (0 bytes) () 09/24/2015 postreply 07:47:30

• 我的車（06sienna）去年有同樣的問題，D，R擋響， P，N擋不響，嚇得我以為是Transmission要翹了。結果真是he -RedDragon- ♂ (167 bytes) () 09/24/2015 postreply 08:05:44

• Thanks a lot for sharing. -GC_Help- ♂ (0 bytes) () 09/24/2015 postreply 10:43:20