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Torque convert wear #2482654
04/14/18 05:42 PM
04/14/18 05:42 PM
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Michigan
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GoDartGo Offline OP
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what causes this kind of wear on the converter? The flex plate was tight and the converter bolts were tight.
I can feel about .010 on one side and nothing on the other.

DSCN9871.JPG
Last edited by GoDartGo; 04/14/18 05:43 PM.
Re: Torque convert wear [Re: GoDartGo] #2482656
04/14/18 05:47 PM
04/14/18 05:47 PM
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Memphis
HemiRick Offline
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Trans not exactly centered behind engine....you need to check and adjust bellhousing alignment.


Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
Re: Torque convert wear [Re: GoDartGo] #2482694
04/14/18 07:03 PM
04/14/18 07:03 PM
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GoDartGo Offline OP
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how much damage to the transmission internals would this cause? I have a spare case, just need to know if I should get another front pump?
BTW, your right, the alinement hole on the trans are not good.
thanks.

Last edited by GoDartGo; 04/14/18 07:05 PM.
Re: Torque convert wear [Re: GoDartGo] #2482700
04/14/18 07:25 PM
04/14/18 07:25 PM
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buildanother Offline
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It could be a lame build on converter. If trans was not exactly centered, why would it wear just one side of conv. snout?

Re: Torque convert wear [Re: GoDartGo] #2482705
04/14/18 07:40 PM
04/14/18 07:40 PM
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GoDartGo Offline OP
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well I have a new Dynamic TC. But I'm sure I will need to replace the case.

Re: Torque convert wear [Re: GoDartGo] #2482750
04/14/18 09:55 PM
04/14/18 09:55 PM
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A727Tflite Offline
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Wear on one side of the impeller is due to "flagpole" - the impeller is not perfectly perpendicular to the converter' lug plane.

A trans that does not share the same centerline as that of the crank would cause wear all the way around the impeller.

The other possibility - when the converter was installed the pilot was not buried in to the crank pocket when tightening the converter bolts.




Last edited by Transman; 04/14/18 10:00 PM.
Re: Torque convert wear [Re: GoDartGo] #2482753
04/14/18 10:03 PM
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GoDartGo Offline OP
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I decided to rebuild the transmission. Is this converter fixable?

Re: Torque convert wear [Re: GoDartGo] #2482805
04/14/18 11:50 PM
04/14/18 11:50 PM
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A good converter shop would have no problem doing that - it would have to be cut at the large closure weld - then the impeller hub would have to removed at the weld and a new one installed then the impeller assembly welded back on to the front cover assembly. Local shops here get about $100 - $125 for all that.

What city are you in ?

Last edited by Transman; 04/14/18 11:51 PM.
Re: Torque convert wear [Re: GoDartGo] #2482997
04/15/18 12:12 PM
04/15/18 12:12 PM
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Big Sky Country
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Make sure the dowels are in the back of the engine

Re: Torque convert wear [Re: GoDartGo] #2483020
04/15/18 12:47 PM
04/15/18 12:47 PM
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Yes, make sure both dowels are there - but that won't cause this type of wear.

It will cause wear all the way around the impeller. And in extreme cases break the flex plate and/or spin the pump bushing.

Common on new built vehicles - production from our assembly plants, and in service after a tech r & r''s the trans and misses the fact that one or both dowels fell out of the block.

Re: Torque convert wear [Re: GoDartGo] #2483078
04/15/18 02:12 PM
04/15/18 02:12 PM
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GoDartGo Offline OP
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I'm south of Battle Creek.
I noticed one of the holes in the transmission case looked somewhat not so round, like the alinement pin had been forced.
Both pins are in the block.

Last edited by GoDartGo; 04/15/18 02:17 PM.
Re: Torque convert wear [Re: GoDartGo] #2483081
04/15/18 02:17 PM
04/15/18 02:17 PM
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Sending you a PM -

Re: Torque convert wear [Re: GoDartGo] #2483217
04/15/18 06:56 PM
04/15/18 06:56 PM
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Rio Linda, CA
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Also, the hub could be out-of-round.


The INTERNET, the MISinformation superhighway
Re: Torque convert wear [Re: John_Kunkel] #2483246
04/15/18 08:03 PM
04/15/18 08:03 PM
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Originally Posted By John_Kunkel
Also, the hub could be out-of-round.
iagree scope

Last edited by Cab_Burge; 04/15/18 08:03 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Torque convert wear [Re: GoDartGo] #2483262
04/15/18 08:30 PM
04/15/18 08:30 PM
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Virginia
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varunner Offline
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How do you check block to trans alignment ?

Re: Torque convert wear [Re: GoDartGo] #2483286
04/15/18 09:13 PM
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On an auto trans - the same way as you are supposed to on a manual trans bellhousing. A little harder to get in there but take your empty trans case and bolt it to the engine.

Take a magnetic dial indicator assembly and attach it to the cramkshaft.

The indicator proble should touch the OD of the pump bore - that checks bore runout.
The indicator probe should then touch the gasket face of the pump bore - that's face runout.

Spin the crank to get TIR ( total indicator runout ).

Look in a service manual for the procedure - and I think it was also called out in the old Direct Connection manuals.

As long as you have two good dowels in the engine and the trans case bores for those dowels are round and not egg-shaped you are normally good. I can't recall ever having a need to install offset dowels like we did on manual transmissions. The flexplate is more forgiving than the flywheel. Plus the converter internals are forgiving too.

When you add pump bushing to converter clearances, internal converter clearances and the flexplate flexibility that provides more flexibility than the manual trans stack up.

Last edited by Transman; 04/15/18 09:19 PM.
Re: Torque convert wear [Re: A727Tflite] #2483319
04/15/18 09:55 PM
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I've got a fresh assembled auto trans, and I don't see how I could get access to do that. I put in 2 new dowels in the block sense they were gone when I got block back from the shop. I trial fitted the trans to the block to check the starter fit, and the dowels were very tight. I'm calling it good up

Re: Torque convert wear [Re: GoDartGo] #2483332
04/15/18 10:17 PM
04/15/18 10:17 PM
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Another observation is that once the trans is bolted in place you should be able to pull the converter in to the back of the crank without much effort. Some rotating clockwise and back while pulling g it forward should enable you to get the drive lugs close to the flexplate. Install your first bolt finger tight then rotate and install the next on and in until they are all installed.

Don't install the first bolt and go to torque - install the next three.

Before installing the trans converter assembly lightly coat the crank pocket where the converter pilots - this also allows the converter to slide in to place without much effort.

Don't forget to take the flexplate and lay it on the converter to make sure you have the offset lug located - then put a paint mark there - this way you install the bolts the first time and they all line up.

Last edited by Transman; 04/16/18 09:19 AM.
Re: Torque convert wear [Re: A727Tflite] #2483448
04/16/18 02:53 AM
04/16/18 02:53 AM
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Originally Posted By Transman
Another observation is that once the trans is bolted in place you should be able to pull the converter in to the back of the crank without much effort. Some rotating clockwise and back while pulling g it forward should enable you to get the drive lugs close to the flexplate. Install your first bolt finger tight then rotate and install the next on and in until they are all installed.

Don't install the first bolt and go to torque - install the next three.

Before installing the trans converter assembly lightly coat the crank pocket where the converter pilots - this also allows the crank to slide in to place without much effort.

Don't forget to take the flexplate and lay it on the converter to make sure you have the offset lug located - then put a paint mark there - this way you install the bolts the first time and they all line up.
iagree up
I use to use some bright paint to mark one ear on the flex plate and on the converter before taking them apart up
I never greased the hubs but that is a good idea thumbs

Last edited by Cab_Burge; 04/16/18 02:56 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Torque convert wear [Re: GoDartGo] #2484036
04/17/18 03:49 AM
04/17/18 03:49 AM
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Affton MO
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qwkmopardan Offline
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What color is the bushing that conveter rides on, inside right behind the seal. If it is bronze color it will wear the converter hub if it has been replaced. Should have a babbit bushing. Silver color.

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