What's up with 2nd gear??? - Mustang Evolution

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Old 05-23-2014, 10:29 AM   #1
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What's up with 2nd gear???

This morning as I was creeping behind some tractor doing 15mph, 2nd gear decided to make this slight grinding noise. Not a grinding like, pushing too hard into gear grinding. My foot wasn't even touching the clutch. Every since then if I'm driving slow in second gear it'll grind at least once. No other gear is doing it. And it doesn't do it if I'm getting on it. Only when creeping. This transmission was rebuilt last year, by who or why I don't know. I've always been iffy about rebuilt trannys. What's causing this?
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Old 05-23-2014, 10:58 AM   #2
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Sounds like overfilled tremec to me. Had the fluid been changed before? OEM was 4 qts I believe but updated specs are 3.25
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Old 05-23-2014, 11:01 AM   #3
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Well I replaced the throwout bearing which involved me draining the transmission fluid. It's possible I guess. But I was more so under the impression that it wasn't enough instead of overflowed. I only put 3 1/2 back in it. I can check it though. But that wouldn't make all of the gears do that? Why just second?
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Old 05-23-2014, 11:11 AM   #4
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What's up with 2nd gear???

3650 is very finicky. If you research the issue, you will see they are all (for the most part) issues with second. Mine had OEM fluid levels, and my second always grinded into gear. Now its smooth as butter. What fluid did you use? The best seems to be GM synchromesh or Mobil 1 synthetic ATF. I used Mobil in mine
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Old 05-23-2014, 11:15 AM   #5
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Wait - I didn't even stop to ask. Do you have a 96 GT like your bio says?
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Old 05-23-2014, 11:26 AM   #6
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Yes.
And it wasn't synthetic. It was a universal fluid that I was "told" would be fine. So. Needless to say I'll go back when I get off work and buy the synthetic one instead and then just drain it and refill it.
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Old 05-23-2014, 11:30 AM   #7
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lol universal fluid *facepalm*

Now, I know the t45 has issues itself, but all the issues I stated were with the tr3650. Before you buy anything, wait for other answers. I am not familiar with the t45, but I know Scotty is changing into a 3650 because his t45 is shot. I think it ha similar issues also though. I am not 100% on what fluid to use for it, so like I said wait for someone who has the t45 and fixed their problems. Hopefully Scotty will chime in, I'm sure he'll know about it.
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Old 05-23-2014, 03:01 PM   #8
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Maybe you should try adjusting the clutch before you do anything else.

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Old 05-23-2014, 03:48 PM   #9
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The clutch has nothing to do with it hun. It's the interior mechanics of the transmission somewhere. I'm gonna bleed out the tranny here in a bit after I get off work and replace the fluids with the synthetics dexron ii and see what happens. Even though it's the t45 and not the 3650 I think he's right about having too much fluid. I'm pretty sure I had put 4qts and not 3.5 but I also didn't know to use a specific fluid, I was told that universal was fine. Which, they didn't make synthetic fluids in 96, and maybe that's why they told me otherwise? Idk. We'll see what happens though.
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Old 05-23-2014, 04:00 PM   #10
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Goodluck, I've been thinking of using synchromesh but I used dex/merc

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Old 05-23-2014, 04:48 PM   #11
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In my t45, I use mercon V. I fill it till it spills out the top hole. Lol Never had an issue, and its got 178K on it with no rebuild.
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Old 05-23-2014, 05:25 PM   #12
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I would DEFINITELY google the second gear issue with the t45, and see if it's as common as the 3650, and what the fixing remedies are before you spend dough. Just my opinion though. Good luck
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Old 05-23-2014, 06:26 PM   #13
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I've never heard of a TSB for the T45 stating that the recommended fill level is incorrect.
I'd just fill it with whatever the factory recommended amount is.
And changing to synthetic DID help my 3650 second gear problem but DIDN'T solve it completely.
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Old 05-23-2014, 06:32 PM   #14
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Quote:
Originally Posted by straybullitt View Post
I've never heard of a TSB for the T45 stating that the recommended fill level is incorrect.

I'd just fill it with whatever the factory recommended amount is.

And changing to synthetic DID help my 3650 second gear problem but DIDN'T solve it completely.

It's all about how long it grinded and how badly it's damaged. My grind basically disappeared. Some people grind just lightens but doesn't disappear. All about luck I guess.
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Old 05-23-2014, 07:03 PM   #15
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Quote:
Originally Posted by V6 stang View Post
It's all about how long it grinded and how badly it's damaged. My grind basically disappeared. Some people grind just lightens but doesn't disappear. All about luck I guess.
Mine really isn't bad at all. During normal driving it shifts nice and smooth into all of the gears (With the exception of reverse of course!). It's when I'm racing that the 1-2 shift can become a problem because I use the minimum amount of clutch when shifting during that sort of driving. It's hard on the transmission but, if done properly some very fast shifting can be accomplished. My transmission has 150k on it and doesn't always want to cooperate with me though.

And Grimace, don't think that the clutch can't cause shifting problems... because it can.
The shifting method that I just described proves that. If you haven't already done so, firmly pull up on the clutch pedal until you feel it become disengaged, and then slowly press the pedal all the way to the floor. You should be able to hear (and feel) a slight click as the ratchet re-engages the clutch quadrant. Pretty simple!
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