Transmission Whine

Mystang66 · May 3, 2021

Transmission still has an issue. Finally got my transmission fluid level right after reassembling everything post rear main seal replacement. But I still have a prominent whining noise coming from the transmission. Louder is reverse but there in all gears. Didn't have an issue before I pulled it to do the main seal.

I appreciate all the help that members on this page provide.

Mystang66 · May 3, 2021

MustangIIMatt said:
Make sure the torque converter is seated correctly.

Yes, I pulled it last weekend and verified that last weekend.

LILCBRA · May 4, 2021

A couple things to consider. After doing a google search on whining C4 transmissions, what fluid are you using? I've found a post that claims there is a whining issue when a synthetic is used. Post number 10 here:

high pitched whine

Here we go again. Under hard acceleration I getting a high pitched whine/squeal from the trans. This is the same noise I had with the other trans. I went and got a 76 trans and built it with a Hughes racing master kit and made sure all the clearances were within specs. I put 5 clutches in each...

www.fordmuscleforums.com

There's actually some other good suggestions there as well.

In some of your other threads (I'd consider starting one build thread to keep everything together and easier to find/follow...) you mention that you're in the middle of a complete mechanical rebuild. Has your transmission been completely disassembled and now reassembled? How is the front pump? If the pump housing is still good but there are signs of wear on the gears, you can get a rebuild kit for <$100, that may fix the issue since a lot of times whining is a symptom of problematic pumps.

FORD C4 C5 Front Pump Rebuild Kit 1964-1986 w/ Gears Seal Bushing C-4 C-5

All parts needed to rebuild the front pump on a FORD C4 transmission, 1964-86. No need to buy a replacement front pump if your pump body housing is still good. Just replace the parts. The oring is only needed for 1964-1966. I will ship it with the kit unless you tell me to hold on to it.

www.classictransmissionsolutions.com

OR...... you can just swap to a manual transmission and eliminate the problem altogether!!

Mystang66 · May 7, 2021

MustangIIMatt said:
You are using Type F fluid, right?

Yep, type F.

Mystang66 · May 7, 2021

Mystang66 said:
Yes, I pulled it last weekend and verified that last weekend.

Mystang66 said:
Transmission still has an issue. Finally got my transmission fluid level right after reassembling everything post rear main seal replacement. But I still have a prominent whining noise coming from the transmission. Louder is reverse but there in all gears. Didn't have an issue before I pulled it to do the main seal.

I appreciate all the help that members on this page provide.

I pulled it and took it to a local transmission shop for tear down. I’ll update here with prognosis so others that may have V8 a similar issue can see what I found.

Mystang66 · May 10, 2021

Spun bushing in the pump housing was the issue. The tranny is being rebuilt.

Enzio · May 10, 2021

Mystang66 said:
Spun bushing in the pump housing was the issue. The tranny is being rebuilt.

Glad you found the problem.

Transmission Whine

Mystang66

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Mystang66

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LILCBRA

I wish I didn't have all of these balls in the air

high pitched whine

FORD C4 C5 Front Pump Rebuild Kit 1964-1986 w/ Gears Seal Bushing C-4 C-5

Mystang66

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Mystang66

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Mystang66

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Enzio

Dang it. I was hoping mine would get 3 more inches

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Transmission Whine

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Member

I wish I didn't have all of these balls in the air

Member

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Member

Dang it. I was hoping mine would get 3 more inches

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