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4th Gen Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine, Transmission, etc...NO ADVERTISING

Thread: Shift Chirp Reply to Thread
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  Topic Review (Newest First)
01-03-2020 10:11 PM
TransEngineer
Quote:
Originally Posted by Sdreese View Post
Good deal. Thank you

Do you have an idea why it chirps though? Like what causes. It in the trans or something?
It's apparently the OD clutch application under certain conditions that causes the noise.
01-03-2020 10:02 PM
Sdreese
Quote:
Originally Posted by TransEngineer View Post
Yes, a 3-4 shift chirp under heavy throttle is pretty common, especially in Mega cabs. I wouldn't sweat it; it doesn't damage the trans.
Good deal. Thank you

Do you have an idea why it chirps though? Like what causes. It in the trans or something?
01-03-2020 09:59 PM
TransEngineer
Quote:
Originally Posted by Sdreese View Post
I know it lol sorry I donít know anything about transmissions. I wish I did though. Mine chirps 3-4 when i put some foot into it otherwise doesnt do it.
Yes, a 3-4 shift chirp under heavy throttle is pretty common, especially in Mega cabs. I wouldn't sweat it; it doesn't damage the trans.
01-03-2020 09:49 PM
Sdreese
Quote:
Originally Posted by TransEngineer View Post
???

The 68RFE trans does not have any bands.

I know it lol sorry I donít know anything about transmissions. I wish I did though. Mine chirps 3-4 when i put some foot into it otherwise doesnt do it.
01-03-2020 09:46 PM
TransEngineer
Quote:
Originally Posted by Sdreese View Post
Mine chirps, stretched trans bands, my trans is going out though.
???

The 68RFE trans does not have any bands.
01-03-2020 09:42 PM
Sdreese Mine chirps, stretched trans bands, my trans is going out though.
12-27-2019 05:20 PM
Aaron37
Quote:
Originally Posted by mstngdtb View Post
Quote:
Originally Posted by Aaron37 View Post
Have you added any additives yet? If not add 16oz of lube guard platinum in. It won't void your warranty and it made all my shift chirp go away.
Did you add this in addition to fluid in the trans?? Or did you drain and refill using this with new fluid?
I added the whole bottle to my transmission after it was full of ATF+4.
12-27-2019 12:35 PM
JesseW
Quote:
Originally Posted by mstngdtb View Post
So since that did fix his problem.. Would you lean toward there being an issue with the fluid in his truck? Just curious since some people have said swapping to Valvoline fluids also solved their problems.

My truck currently has a little under 50k miles on it.. Debating if i should do a fluid change, or what additive to try and ease this noise.. it has only gotten louder and I wonder if that is from fluid breakdown or is the torque converter actually mechanically messed up. Any thoughts or suggestions??
i wonder if the torque converter clutches, or some other band/whatever magic they use in the transmission is getting glazed over. my truck before i added the friction modifier was quieter when cold, and as the trans came up to temp, it would get louder and louder on the 3-4 shift. that indicates to me as the fluid warms up and becomes thinner, its doing something different. the lube gard stopped all noise.

sometimes clutch material needs a friction modifier. The clutch pack in my old nova's posi rear pops and barks and had a hard time disengaging until i put some extra friction modifier in it. now its silent and still works.

only time will tell if the friction modifier will cause it to wear out faster or not, but i couldn't stand the barking anymore and i had seen several other threads about the transmission being louder after replacement..... i tow a 9000 lb enclosed trailer about 8k miles a year so it's not like i'm working the truck at its max.

this is the stuff i put in it. the forum still won't let me hot link.... lubegard.com/products/isf/
12-27-2019 10:11 AM
mstngdtb
Quote:
Originally Posted by TransEngineer View Post
Glad you're happy! Keep us posted on how things work out long-term.

I'm not a fan of "shudder fix" products like this, because they are typically friction modifiers that REDUCE the coefficient of friction for the various clutch packs. So what used to be a shudder (stick-slip condition, like slip-grab-slip-grab-slip-grab during engagement) now becomes simply a slip. So the shudder does go away, but my fear is that eventually your clutch will go away also (due to increased slippage and heat during engagements). So I'm interested to hear whether your trans continues to have a happy (long) life after this fix.
So since that did fix his problem.. Would you lean toward there being an issue with the fluid in his truck? Just curious since some people have said swapping to Valvoline fluids also solved their problems.

My truck currently has a little under 50k miles on it.. Debating if i should do a fluid change, or what additive to try and ease this noise.. it has only gotten louder and I wonder if that is from fluid breakdown or is the torque converter actually mechanically messed up. Any thoughts or suggestions??
12-27-2019 09:58 AM
mstngdtb
Quote:
Originally Posted by Aaron37 View Post
Have you added any additives yet? If not add 16oz of lube guard platinum in. It won't void your warranty and it made all my shift chirp go away.
Did you add this in addition to fluid in the trans?? Or did you drain and refill using this with new fluid?
12-27-2019 08:53 AM
TransEngineer
Quote:
Originally Posted by JesseW View Post
my new 2019 RAM 3500 with the Aisin has chirped on the 3-4 shift from day one, i bought it about 2 months ago. has 1700 miles on it as of today.

today i bought a bottle of LubeGuard DrTranny shudder fixx (2 oz red tube, i tried to post a link to summit, but too new) and put it in at the parts store, hasn't chirped since, fixed instantly. I drove it 75 miles trying to make it chirp and it wouldn't. really happy at the moment.
Glad you're happy! Keep us posted on how things work out long-term.

I'm not a fan of "shudder fix" products like this, because they are typically friction modifiers that REDUCE the coefficient of friction for the various clutch packs. So what used to be a shudder (stick-slip condition, like slip-grab-slip-grab-slip-grab during engagement) now becomes simply a slip. So the shudder does go away, but my fear is that eventually your clutch will go away also (due to increased slippage and heat during engagements). So I'm interested to hear whether your trans continues to have a happy (long) life after this fix.
12-26-2019 10:45 PM
JesseW my new 2019 RAM 3500 with the Aisin has chirped on the 3-4 shift from day one, i bought it about 2 months ago. has 1700 miles on it as of today.

today i bought a bottle of LubeGuard DrTranny shudder fixx (2 oz red tube, i tried to post a link to summit, but too new) and put it in at the parts store, hasn't chirped since, fixed instantly. I drove it 75 miles trying to make it chirp and it wouldn't. really happy at the moment.
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