Flexplate and Torque Converter? - Hemi Truck Club
 
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Old 03-18-2016, 09:02 PM   #1
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Flexplate and Torque Converter?

I've got a 2005 Ram 1500 2wd Daytona. No modifications currently.

I have a nasty ticking sound coming from inside the bell housing. Video link is at the bottom of this post. It's between the trans and the engine. I've used my mechanics stethoscope to try and isolate it. It doesn't happen at idle, doesn't happen in reverse that I can hear. It only ever starts when I'm in gear and moving with the engine between 1500-3000 rpm's. And even then, it will not do it when decelerating or under heavy load. Only when the throttle is at about 20% (i.e. cruising/maintaining speed). It will do it in park, but it's nowhere near as bad and not consistent.

Put it on the valve cover - just the normal light ticking of the valves
Put it on the head - Normal valve ticking and slightly louder exhaust.
Put it on the oil pan - Muffled sound. nothing weird, and no ticking in there at all.
Put it on the oil pan bolts and it was audible but kind of quiet
Put it on the transmission pan and it was audible
Put it on the bell housing and bingo... it's LOUD.
Put it on the mating point right where the flex plate is, and it's the loudest.

It's worth noting that I do have an exhaust leak at the head which I will be fixing very soon with some headers, new gaskets, and new hardware. BUT I don't think it's related because the sound from that can be heard at the same time as the mystery tick, and they are audible at different times and sound completely different.

I took the truck into a certified transmission shop and they looked at it for me. I told them if they could find the problem I would have them fix it, so they had EVERY incentive to find SOMETHING wrong... and they couldn't isolate it. They took off the inspection window and even re-torqued the TC bolts. Still ticking. They didn't charge me for the inspection or work and they didn't find any cracks in the flexplate. But full disclosure, that inspection window does not let you see the whole flexplate, so they wouldn't be able to see cracks around the flexplate where it bolts to the crank.

I changed the oil 3 days ago and there was absolutely zero metal stuck to the drain plug magnet I highly doubt this is an engine related issue.

Anyone know where I can get a high quality replacement flexplate and who makes the best 2600 stall for a daily driven truck. Also, are there any other mods I should do while I have the TC and flexplate off?

Thanks, guys.

Here's a video of the sound.

https://youtu.be/4NPrvWM9EPs

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Old 03-19-2016, 03:52 AM   #2
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Welcome to the forum. I am a fan of Edge torque converters. Call and talk to Andre about what you need. There are aftermarket flex plates, but I have never felt I needed to use one. Like you said the transmission shop had incentive to find the problem and retorque the TC bolts. I wonder if they used a bar and tried to flex the converter back and forth. Maybe pull the starter to see if you can find where anything is hitting. And if there is no metal dust then I guess the flex plate is maybe cracked. When you change TC'S I would obviously also change the flex plate for good measure. Good luck...
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Old 03-19-2016, 06:24 AM   #3
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Welcome to HTC! Thy is either a cracked flex plate or worn 7/8 bearings under load. You can do a simple plate test yourself. Remove the torque converter bolts and push it back. Then take a wrench and tap the plate it should ring like a bell if it doesn't there is a crack in it. The plate uncracked will ring like a bell kinda cracked it will just dink sound. This is a simple test before pulling trans out
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Old 03-19-2016, 07:43 AM   #4
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Quote:
Originally Posted by charged392 View Post
Welcome to HTC! Thy is either a cracked flex plate or worn 7/8 bearings under load. You can do a simple plate test yourself. Remove the torque converter bolts and push it back. Then take a wrench and tap the plate it should ring like a bell if it doesn't there is a crack in it. The plate uncracked will ring like a bell kinda cracked it will just dink sound. This is a simple test before pulling trans out
Keith, good call on the flex plate. I knew they would ring but never thought of trying to test them installed. Never too old to learn a new trick.
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Old 03-19-2016, 08:02 AM   #5
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Also unbolt the converter and start the truck and see if it makes noise then too
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Old 03-19-2016, 09:25 AM   #6
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I use to disconnect the pump from the engine on my jet boat when I worked on the engine. It had a lot of cam in it and without the weight of the pump spinning it sounded like a top fueler. sweet...
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1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
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Old 03-19-2016, 12:16 PM   #7
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Old 03-19-2016, 05:37 PM   #8
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Thanks for the welcome and advice, guys.

I love this truck. I will never get rid of it. The engine seems healthy and I take good care of it. Changing fluids all the time. I need to upgrade the rear diff because I discovered the clips broken out last time I changed the fluid. Other than that and standard suspension parts being worn out, it's pushing 118,000 miles and pulling strong. Literally. I tow a trailer every now and then and it doesn't fight me at all.

I think I'll remove the inspection window and disconnect the TC bolts next weekend. See if I can't make that baby ring like a bell. If not, I'll have to look at replacement.

Can any of you point me in the right direction for a standard replacement flexplate? I've searched the Googlez, but I can't find anything that says 100% it works with my 5-45RFE. I don't want to buy the wrong one only to find out when I get in there to do it. I swear I'm not inept. haha.

This forum seems to have a LOT more technical knowledge than the others I've been on before. I took a break from modifying my truck back when I bought another project car. It's time I spend some more time and money on my first love. hah
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Old 03-19-2016, 05:46 PM   #9
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Get one from the dealer it's likely pretty cheap compared to others and will be correct
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Old 03-19-2016, 06:14 PM   #10
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If you are interested, I have a used flexplate I took off of Redtruck when I changed transmission.
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1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
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