this is a tricky one...need help a.s.a.p. - Page 2

lilgib12 · 03-16-2009, 11:14 AM

This is the second tranny. We've only changed it once. Someone said check my engine and tranny mounts. Anyone ever hear of that causeing the sound? My haynes manual even says if an engine mount is broken it could cause strain and damage to the driveline components

hotrodpc · 03-16-2009, 02:17 PM

The flexplate is certainly a good option to check out. And you have changed the torque converter too with the trans changes? Going out on a limb with what may be a stupid suggestion, but I have seen this happen before. How is your oil pressure? How about the condition of your rear main seal in the engine? A long time ago, a buddy of mine had some strange metal to metal sound. He changed out the trans and converter. Fixed the problem, he found a chewed up converter nose and front seal in the trans. The new trans and converter didn't last long. The actual problem came to be bad main bearings at the crank. The crank was moving around enough it was tearing up converters and trans front seals. He did have a small rear main seal leak at first, but nothing serious. The problem came to a head when the main seal was so bad, it had to be fixed. The crank was all chewed up and could no longer be used at all. His didn't make any noise either until he put it under a strain. He could even rev it up in P or N and it was fine. Put it in gear and rev the slightest, and it sounded nasty. Didn't think much of the bearings since it was not knocking. Hopefully your problem is not that serious.

gmctrucks · 03-16-2009, 04:11 PM

Quote:

Originally Posted by Scottsdale 2500

Yea. Definatly look in the rear end for stuff. I know you had it up on stands but did you check the carrier bearing if it has one? Mine just went out last week and it sounded horrible.

Say this sounds good as well but like him I don't know if it has one. Stop buying parts that you don't need you need to find out what the real problem is without spending all sorts of money and the labor your doing.
Good luck! GMC

PS-Plus you truck has a lot of miles so even check the U-Joints maybe one is bad now that can fool you good too. We need to find the problem guys more info please or ideas.

batty1214 · 03-16-2009, 04:23 PM

so I didn't read all the posts...... and if you have done this already, disreard this........ When I have a gear sound that I cannot figure out, I always drop all fluids.... motor, tranny, front and rear diff, and transfer case...... when you do, watch for chunks or chips, and run a magnet around the bottom of your pan on the end of a sting...... IF you gears are coming apart, then you will find debree..... I use a pan that has a drain with a screen in it, so I can look for particles after the oil is drained.... I have found a lot of stuff this way...... but, thats my input....... but as said, you might want to look at the flexplate........ If it is starting to come apart, It will make some pretty bad noises.

lilgib12 · 03-16-2009, 05:22 PM

Thanks for all the immediate replies. In a nutshell we started from the rear and worked our way forward. With rear of truck off ground we check rear brakes which were change recently. Driveshaft removed and still loud sound. Xfercase changed still sound. Removed xfercase still sound. changed tranny still sound. at present tranny only part still connected to truck. This truck has tilt wheel. The entire steering wheel moves. Friend of my dad suggested removing linkage from tranny and shift truck from underneath with idea that bad tilt wheel mite be causing starter to engage when shifting. This was tried and still same noise. I was always told there are no stupid questions. What is flexplate? Another day tomorrow I will keep all updated.

leolkfrm · 03-16-2009, 05:24 PM

flexplate is the flywheel

lilgib12 · 03-16-2009, 05:26 PM

Thank you. 19 and learning.

gmctrucks · 03-16-2009, 10:00 PM

[quote=lilgib12;962 This truck has tilt wheel. The entire steering wheel moves. Friend of my dad suggested removing linkage from tranny and shift truck from underneath with idea that bad tilt wheel mite be causing starter to engage when shifting.

Yes that is true if your tilt wheel bearings are bad it will make the rod leading to starter switch to engage which will make a lot of noise. That happened to a car of mine before the starter switch under the steering column was going out I would have to move my tilt wheel around till it would start so it can happen if your truck is standard or have a column shifter. When you remove the inspection plate to check your flexplate check the teeth out as well if that's happening it should have worn teeth or some signs that it has been hurt. I'm telling you I really want for us all to help you find this problem it would be killing me if it was my truck.
Good luck! GMC
PS-I just remembered my bearing in my steering column were bad I had to replace them it's easy just study it before you start taking it apart.

Rago · 03-17-2009, 09:38 AM

Quote:

Originally Posted by leolkfrm

flexplate is the flywheel

Sort of...

They serve the same purpose but a flywheel is used on manual transmissions & a flexplate is used on automatics. They aren't interchangeable in case you end up needing one.

hotrodpc · 03-17-2009, 11:13 AM

True, to be using correct lingo, but I think its like a Crescent Wrench or Channeloocks. We normally refer an adjustable wrench as a crescnet wrench, and arc-jonit pliers as channelocks. No one says hand me the arc-joint pliers. Crescent and Channelock are the name brands. Same goes for weedeater. Its a string line trimmer. If its got teeth on it we call it a flywheel whether it be for an auto or manual trans. Leave it to Dodge, but they really do use a flex palte. The teeth are built into the torque converter, you bolt the flexplate to the crank and bolt the flexplate to the converter. Strange looking set-up. But it works. You can't fire up the dodge engine in the back of a pick up without a torque converter or manual trans flywheel.

03-16-2009, 05:24 PM	#16
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	flexplate is the flywheel __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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03-16-2009, 11:14 AM	#11
lilgib12 Full Member Join Date: Feb 2009 Posts: 14	This is the second tranny. We've only changed it once. Someone said check my engine and tranny mounts. Anyone ever hear of that causeing the sound? My haynes manual even says if an engine mount is broken it could cause strain and damage to the driveline components

03-16-2009, 02:17 PM	#12
hotrodpc Senior Member Join Date: Jul 2008 Location: OKC, OK Posts: 3,163	The flexplate is certainly a good option to check out. And you have changed the torque converter too with the trans changes? Going out on a limb with what may be a stupid suggestion, but I have seen this happen before. How is your oil pressure? How about the condition of your rear main seal in the engine? A long time ago, a buddy of mine had some strange metal to metal sound. He changed out the trans and converter. Fixed the problem, he found a chewed up converter nose and front seal in the trans. The new trans and converter didn't last long. The actual problem came to be bad main bearings at the crank. The crank was moving around enough it was tearing up converters and trans front seals. He did have a small rear main seal leak at first, but nothing serious. The problem came to a head when the main seal was so bad, it had to be fixed. The crank was all chewed up and could no longer be used at all. His didn't make any noise either until he put it under a strain. He could even rev it up in P or N and it was fine. Put it in gear and rev the slightest, and it sounded nasty. Didn't think much of the bearings since it was not knocking. Hopefully your problem is not that serious.

03-16-2009, 04:23 PM	#14
batty1214 Senior Member Join Date: Nov 2008 Location: Vernal Utah Posts: 1,135	so I didn't read all the posts...... and if you have done this already, disreard this........ When I have a gear sound that I cannot figure out, I always drop all fluids.... motor, tranny, front and rear diff, and transfer case...... when you do, watch for chunks or chips, and run a magnet around the bottom of your pan on the end of a sting...... IF you gears are coming apart, then you will find debree..... I use a pan that has a drain with a screen in it, so I can look for particles after the oil is drained.... I have found a lot of stuff this way...... but, thats my input....... but as said, you might want to look at the flexplate........ If it is starting to come apart, It will make some pretty bad noises.

03-16-2009, 05:22 PM	#15
lilgib12 Full Member Join Date: Feb 2009 Posts: 14	Thanks for all the immediate replies. In a nutshell we started from the rear and worked our way forward. With rear of truck off ground we check rear brakes which were change recently. Driveshaft removed and still loud sound. Xfercase changed still sound. Removed xfercase still sound. changed tranny still sound. at present tranny only part still connected to truck. This truck has tilt wheel. The entire steering wheel moves. Friend of my dad suggested removing linkage from tranny and shift truck from underneath with idea that bad tilt wheel mite be causing starter to engage when shifting. This was tried and still same noise. I was always told there are no stupid questions. What is flexplate? Another day tomorrow I will keep all updated.

03-16-2009, 05:26 PM	#17
lilgib12 Full Member Join Date: Feb 2009 Posts: 14	Thank you. 19 and learning.

03-16-2009, 10:00 PM	#18
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,035	[quote=lilgib12;962 This truck has tilt wheel. The entire steering wheel moves. Friend of my dad suggested removing linkage from tranny and shift truck from underneath with idea that bad tilt wheel mite be causing starter to engage when shifting. Yes that is true if your tilt wheel bearings are bad it will make the rod leading to starter switch to engage which will make a lot of noise. That happened to a car of mine before the starter switch under the steering column was going out I would have to move my tilt wheel around till it would start so it can happen if your truck is standard or have a column shifter. When you remove the inspection plate to check your flexplate check the teeth out as well if that's happening it should have worn teeth or some signs that it has been hurt. I'm telling you I really want for us all to help you find this problem it would be killing me if it was my truck. Good luck! GMC PS-I just remembered my bearing in my steering column were bad I had to replace them it's easy just study it before you start taking it apart.

03-17-2009, 11:13 AM	#20
hotrodpc Senior Member Join Date: Jul 2008 Location: OKC, OK Posts: 3,163	True, to be using correct lingo, but I think its like a Crescent Wrench or Channeloocks. We normally refer an adjustable wrench as a crescnet wrench, and arc-jonit pliers as channelocks. No one says hand me the arc-joint pliers. Crescent and Channelock are the name brands. Same goes for weedeater. Its a string line trimmer. If its got teeth on it we call it a flywheel whether it be for an auto or manual trans. Leave it to Dodge, but they really do use a flex palte. The teeth are built into the torque converter, you bolt the flexplate to the crank and bolt the flexplate to the converter. Strange looking set-up. But it works. You can't fire up the dodge engine in the back of a pick up without a torque converter or manual trans flywheel.