Metal parts found in 4r70w - Transmission Problems


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Metal parts found in 4r70w

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Auto Repair Home>> Automotive Repair>> Transmission Problems

4r70w
New User

Jun 27, 2022, 11:17 AM

Post #1 of 3 (1669 views)

Metal parts found in 4r70w	Sign In

2003
Ford
Mustang
3.8
110,000

Hello all I have a ford mustang that was driving without an issue. I changed the transmission fluid at 60K mile without any issues. I recently decided to flush it again at 110,000 as normal maintenance. At this time I found thin metal pieces in the pan but the transmission still had no issues. I decided to remove the unit and do a rebuild as I didn't want to break down. I have disassembled the entire unit and inspected all components with a fine tooth comb. I am not able to identify were these pieces came from and Im worried I will rebuild the unit and have the same problem down the road, since I can't located it. Can someone take a look and try to help me identify the culprit. These pieces are supper thin and are about an 1/8 inch in size. Could this be coming from the torque converter as that is the only unit I can not inspect? Any help is greatly appreciated. If there is any addition information needed please let me know.

(This post was edited by 4r70w on Jun 27, 2022, 11:20 AM)

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 27, 2022, 1:58 PM

Post #2 of 3 (1651 views)

Re: Metal parts found in 4r70w	Sign In

We have a trans expert that will be along eventually. His name is Gary (Gsferraro). He is the right guy to answer this.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

gsferraro
Veteran

Jun 27, 2022, 5:32 PM

Post #3 of 3 (1641 views)

Re: Metal parts found in 4r70w	Sign In

Hello,
Check the sprags, there are 2 of them, one in the reverse drum and one in the planetary, the one in the drum goes bad often, if all looks ok probably coming from converter. Gary

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