Paging all auto-trans. pros...
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Paging all auto-trans. pros...
what could break in a 700R4 tranny that would result in a sound similar to an engine rod knock?(even at idle or in park)
:confused: :confused: :confused:
:confused: :confused: :confused:
Pro
Joined: Jul 1999
Posts: 741
Likes: 0
From: Eagle IDAHO
Cruise-In I Veteran
Cruise-In II Veteran
Re: Paging all auto-trans. pros... (BluByU)
Torque converter bolts may be loose causing the converter to move slightly on the flex plate. This is not hard to check and fix unless the flex plate has cracked. Even then, it dosn't require the engine or tranny to me removed.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Paging all auto-trans. pros... (BluByU)
Are you sure its from the tranny? disconnect the tranny from the motor, and start it up. If the problem is not there, then its definately the tranny, if its still there....the motor is the problem.
Didn't I just see where you said the tranny was blowing oil all over? Maybe your TC is trashed. :confused:
Didn't I just see where you said the tranny was blowing oil all over? Maybe your TC is trashed. :confused:
Thread Starter
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: Paging all auto-trans. pros... (ski_dwn_it)
no.. that was someone else's post... no tranny fluid spewing... I cant really start the car now that the motor is out of it and stripped down... I was SURE it was a rod knowck.. I took the motor out and stripped it and I dont see any OBVIOUS signs of bearing damage.. I'm taking it to the machine shop for a closer inspection.. but im pretty sure an auto tranny cant make a rod knock sound.. they haver no opposing force elements (like a crank throw) everything works in a circular motion would would make a grinding sound, not a knocking sound if blown..
aghh.. keep the ideas commin!! :thumbs:
aghh.. keep the ideas commin!! :thumbs:
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: Paging all auto-trans. pros... (BluByU)
You may need to magnaflux the flex plate to find a crack.
Or you can try the old railroad method. Heavily coat the plate with a thin oil, i.e. 3-in-1, let it soak for awhile (overnight is best). Wash it and quickly dry it, then coat it with powder, talc is good. Let it sit. Any lines that show up would be cracks from the oil seeping back out.
[Modified by John Row, 10:38 AM 6/9/2003]
Or you can try the old railroad method. Heavily coat the plate with a thin oil, i.e. 3-in-1, let it soak for awhile (overnight is best). Wash it and quickly dry it, then coat it with powder, talc is good. Let it sit. Any lines that show up would be cracks from the oil seeping back out.
[Modified by John Row, 10:38 AM 6/9/2003]
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