Rebuilt 4l60e, now vibration...
Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
Rebuilt 4l60e, now vibration...
Just had my tranny rebuilt by a "reputable" shop...
1st shot, she leaked a bit and vibrated a bit. They took it back, fixed the leak and replaced the torque converter again.
The rebuild vibrates...
-in park at 1000 RPM, stops at 1150rpm
-during aggresive driving between 4500-5500 RPM. This vibration is sort of on for 1/2 sec, off for 1/2 sec.
None of this seems to be speed related, thus thinking not related to driveshaft balance....
Help!
1st shot, she leaked a bit and vibrated a bit. They took it back, fixed the leak and replaced the torque converter again.
The rebuild vibrates...
-in park at 1000 RPM, stops at 1150rpm
-during aggresive driving between 4500-5500 RPM. This vibration is sort of on for 1/2 sec, off for 1/2 sec.
None of this seems to be speed related, thus thinking not related to driveshaft balance....
Help!
Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
pete,
is there any balancing/matching up to the flywheel to the torque converter that should have been done when they reinstalled?
as you can probably guess, there was absolutely no vibration prior to the rebuild...
(oh, btw i will try to do what you suggest with the driveshaft this weekend)
thanks!
Jeff
is there any balancing/matching up to the flywheel to the torque converter that should have been done when they reinstalled?
as you can probably guess, there was absolutely no vibration prior to the rebuild...
(oh, btw i will try to do what you suggest with the driveshaft this weekend)
thanks!
Jeff
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
The converter "should" be balanced and not require moving it in relation to the flexplate. The shop I use aims for less than 3 grams. My personal converter was balance to within 1/2 gram
. If the driveshaft phasing does not fix it, try to rotate the converter I bolt and see if it helps. If it gets better or worse, try spinning it to the 3rd and last hole. I hope it is not a converter problem, but I see it quite a bit with the cheaper remans.
Give it a try and good luck.
. If the driveshaft phasing does not fix it, try to rotate the converter I bolt and see if it helps. If it gets better or worse, try spinning it to the 3rd and last hole. I hope it is not a converter problem, but I see it quite a bit with the cheaper remans. Give it a try and good luck.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
It does, a bit. Also works well as a cushion for the torque. Because the lock up plate inside is big and heavy, it is a bit tougher to balance a lock up converter, compared to non lock up. The truth is high volume converter shops often knock off the factory weight before they cut the unit open, and sometimes forget to balance then when they are done. I received 3 non balanced converters from TCI and 2 from B&M over the years. If changing the converter on any car, always check the new one for the presence of a weight. No weight at all is not typical. In the old days, before I used my favorite shop, if a converter came out of the box with no weight, I shipped it back. The first 2 times I got a vibration, I learned to closely examine the weights. Also, always inspect a converter hub at the square notches for cracking.
Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
okay... next question... they will probably do the warrenty r&r again (I am hoping that they don't claim this is "normal vibration" )
would it be smart to just go out and buy a new high quality converter? they say this is the second rebuild that they've installed...
thanks,
)would it be smart to just go out and buy a new high quality converter? they say this is the second rebuild that they've installed...
thanks,
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Good question.
Because I have been down that road, I can relate to wanting a different converter. I paid for a paint job with a lifetime warrantee. After 18 attempts by the shop at repairing it, I then realized that some warrantees are not worth it. If it turns out to be the converter(we do not yet know it is), I myself, would buy a different brand. Lots of good converter companies in the US. I am very lucky to have a good one 1 hr from my home.
Because I have been down that road, I can relate to wanting a different converter. I paid for a paint job with a lifetime warrantee. After 18 attempts by the shop at repairing it, I then realized that some warrantees are not worth it. If it turns out to be the converter(we do not yet know it is), I myself, would buy a different brand. Lots of good converter companies in the US. I am very lucky to have a good one 1 hr from my home.
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Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
Update
-Turned the crankshaft 180 degrees, no love...
-Changed the flywheel/torque converter phasing, no love...
-Ran the engine while while disconnected from the torque converter, no harmonic vibration...
-Talked to the trans shop, they said they think it has nothing to do with the transmission
. The manager wants me to show him the vibration.
Here's my case:
-It didn't have this vibration before the rebuild.
-The vibration occurs in a certain RPM range in EACH gear (NOT related to speed)...
-I have tried the above.
I don't want the guy to lose money on the job, but the car is not right! I am thinking torque converter...
Please come forward with opinions, folks...
Much appreciated...
Jeff
-Changed the flywheel/torque converter phasing, no love...
-Ran the engine while while disconnected from the torque converter, no harmonic vibration...
-Talked to the trans shop, they said they think it has nothing to do with the transmission
. The manager wants me to show him the vibration.Here's my case:
-It didn't have this vibration before the rebuild.
-The vibration occurs in a certain RPM range in EACH gear (NOT related to speed)...
-I have tried the above.
I don't want the guy to lose money on the job, but the car is not right! I am thinking torque converter...
Please come forward with opinions, folks...
Much appreciated...
Jeff
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
The odds of an internal trans vibration is extremely rare. It can happen from a worn case bushing. However, even if the shop did not change the case bushing, it should not cause a sudden vibration immediately after the rebuild. When the driveshaft is removed, wiggle the output shaft up and down. If it moves more than 1/4 inch, shame on them for not changing it.
Long story short, if the trans comes out, replace the converter with a quality unit.
Long story short, if the trans comes out, replace the converter with a quality unit.
Thread Starter
Racer
Joined: May 2003
Posts: 304
Likes: 1
From: beaverton oregon
update: fixed
well, it was the converter...
guy agreed to replace it, though he swore up and down it wasn't the converter
I agreed to pay for an upgraded converter, though he insisted that I buy it from him or void the warrenty...
he put it in and said the vibration was still there... it wasn't
guess he didn't like to be wrong :rolleyes
went with 2200 stall... interesting combo with the 3.54... ASR is doing a lot of work
thanks a million to PeteK... I owe you much beer or whatever you're preferred beverage might be
:cheers
guy agreed to replace it, though he swore up and down it wasn't the converter
I agreed to pay for an upgraded converter, though he insisted that I buy it from him or void the warrenty...
he put it in and said the vibration was still there... it wasn't
guess he didn't like to be wrong :rolleyes
went with 2200 stall... interesting combo with the 3.54... ASR is doing a lot of work
thanks a million to PeteK... I owe you much beer or whatever you're preferred beverage might be
:cheers
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Originally Posted by TankerVette
well, it was the converter...
guy agreed to replace it, though he swore up and down it wasn't the converter
I agreed to pay for an upgraded converter, though he insisted that I buy it from him or void the warrenty...
he put it in and said the vibration was still there... it wasn't
guess he didn't like to be wrong :rolleyes
went with 2200 stall... interesting combo with the 3.54... ASR is doing a lot of work
thanks a million to PeteK... I owe you much beer or whatever you're preferred beverage might be
:cheers
guy agreed to replace it, though he swore up and down it wasn't the converter
I agreed to pay for an upgraded converter, though he insisted that I buy it from him or void the warrenty...
he put it in and said the vibration was still there... it wasn't
guess he didn't like to be wrong :rolleyes
went with 2200 stall... interesting combo with the 3.54... ASR is doing a lot of work
thanks a million to PeteK... I owe you much beer or whatever you're preferred beverage might be
:cheers
.Sometimes I am a lucky guesser.
