這幾天努力在國外的論壇爬文後發現,原廠曾經對這個問題發出技術通報,描述的現象跟我的狀況一模一樣,主要是要更換Transmission Output Flange (變速箱輸出的三角輪片修理包),研究一下好像是跟傳動軸連接中間會夾著六角橡皮,可是國內好像都沒有人處理過這個,或是有大大處理過可以分享一下嗎? 會不會這個問題就是很多大大處理完鐵套和六角橡皮或是檢查不出問題,最後保養廠推測是變速箱問題的原因?
我大致翻譯一下,翻不好請見諒或糾正
主題: E46 GM5變速箱"咚"異音
車型: E46 98年5月~00年3月
狀況: 在負載逆轉的情況下會聽到或感覺到有一個"咚"的異音。 這種情況可能會發生在降檔、放開油門踏板在時數20-30英里,轉速在2000-2500rpm
原因: 變速箱輸出軸和變速箱輸出輪片有過多的軸間隙
修正: 更換變速箱輸出輪片 (Transmission output flange) 料號: P/N 24 21 7 515 388
判斷方式:在引擎升溫後,開車保持時數在20-25英里,快速的鬆開油門,在進入減速模式或不久後,在傳動軸後方會聽到一個敲擊的異音,那麼原因就是變速箱輸出輪片
主要就是更換上圖這個修理包,原文有記載更換程序
原文網址:
http://forums.bimmerforums.com/forum...ound-nightmare
(直接引用,不妥煩請站長告知我刪除)
SUBJECT
E46 GM5 Transmission "Clunk" Noise
MODEL
E46 – 323iA, 328iA produced from 05/98 up to 03/00 with A5S360R (GM5) Transmission
SITUATION
A "Clunk Noise" is heard/felt during situations of load reversal. The situation can occur during downshifts, release of accelerator pedal at 20-30mph with 2000-2500 rpm or in reverse at 3000 rpm and accelerator pedal released.
This concern involves E46 vehicles with M52TU engines, fitted with transmission A5S360R until transmission serial number 162728.
CAUSE
Excessive axial clearance between transmission output shaft and transmission output flange.
CORRECTION
A production change has been implemented as of transmission serial number 162728
In the event of a customer complaint on vehicles with a transmission serial number less than 162728 the location of the noise should be determined during a test drive as follows:
- With the engine warm, drive the car at a speed between 20 and 25 MPH. While traveling in this speed range, quickly release the accelerator pedal (causing engine braking to occur).
- If a muffled knocking noise is heard coming from the rear-axle area after going into decel mode, or shortly thereafter, then the cause is with the transmission output flange. Replace transmission output flange with the new version P/N 24 21 7 515 388 with spring washer as per repair instructions 24 21 ... (available as of TIS CD 9/98).
- If the noise does not appear to be coming from the rear axle area further diagnosis is required in order to isolate the source of the "clunk". Recommendation would be to utilize a chassis ear to locate the source of the clunk noise.
The repair kit "Output flange with spring washer" (PN 24 21 7 515 388) can be ordered through the regular parts channels.
PROCEDURE
Installation of the kit on the transmission:
- Remove the exhaust pipe from the vehicle as per procedure 18 00 020 "Removing and Installing complete exhaust system M52 TU".
- Remove the propeller shaft from the transmission as per procedure 26 11 000 "Removing and Installing complete propeller shaft"
3. Hold output flange (1) with special tool 23 0 020.
Remove hexagon nut.
Remove output flange (1).
On the transmissions from serial number 7912, remove the retainer (snap ring) from the output shaft
Discard the nut, the seal O-ring of the flange, and the retainer.
4. Prepare the retrofit kit :
- (1) Snap ring
- (2) O-ring
- (3) Output flange
- (4) Spring washer
- (5) Flange nut
5. Install new drive flange O-ring (1) (from the kit) into the new drive flange (2) using Transmission fluid or petroleum jelly
6. Install the "Retainer" (1) included in the kit using snap ring wrench, as deep as possible on the output shaft (2).
Note: Be careful to not damage lip seal when installing the "Retainer".
7. Install new drive flange with O-ring onto the transmission output shaft and push the retainer fully into place
8. Install the spring washer (1) from the kit as shown on the drive flange (2) (big diameter face to flange 2, small diameter face to nut).
9. Apply coat of "LOCTITE 242" to the thread of the output shaft.
NOTE:
"LOCTITE 242" is the only thread locker/sealant approved for this repair, and it is available from your local Loctite distributor.
10. Tighten the new nut (1) (included in the kit) on the output shaft using a
Hexagonal M30 Socket
11. Tightening torque :
80 Nm