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Unread 07-14-2013, 04:40 PM   #1
jr4x4
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tf999 problem

I have a 1990 4.2 yj tf999 auto weber carb,nuttered , team rush, pre smog dizzy. just put a rebuilt 4.2 in 2 weeks ago. runs mint. then started hearing a tick noise a week later. long story short the flexplate cracked around the bolt holes. (flexplate had 190,000 miles on it) ok picked up a used flexplate and put it in last week. still clink clink clink at idle. so I just bought a brand new flexplate and droped tranny again today and put new one on. torque converter seemed fine. I checked the shield for bends. and put it back together for the second time in a week. and I start it. clink clink clink. eerrrrrr. so I ran and bought a new starter. (mine was pretty shot) still this noise the noise is coming from this spot. not the engine. only have 500 miles on engine. please any help would be great. im about to loose my mind. everything is torqued to speck. I spray painted the first plate and there where no rub marks. what is hitting???

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Unread 07-15-2013, 05:49 AM   #2
jr4x4
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morning bump. anyone???
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Unread 07-15-2013, 07:07 AM   #3
superj
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i had cherokee that one bolt on the torque converter would back out a bit and hit in the bell housing on the block. it made a noise like a bearing was bad but really light.
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Unread 07-15-2013, 07:20 AM   #4
jr4x4
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Quote:
Originally Posted by superj View Post
i had cherokee that one bolt on the torque converter would back out a bit and hit in the bell housing on the block. it made a noise like a bearing was bad but really light.
yea. but i just bolted this new one in. i noticed after a 20 min.. drive today the clank sound at idle was almost gone. i feel like it has to be the torque converter. both of the flexplates ive put in that are fine seem to have a slight wobble . maybe the converter is wobbling?? ( sorry spelling)..
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Unread 07-15-2013, 09:55 AM   #5
CJ51973
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Mine does this randomly. Haven't figured it out. It happens more when warm. Park seems louder than in gear. I had the tranny rebuilt when I got it so I was planning on swinging in and letting them listen the next time I hear it. I was wondering if the starter is rubbing something or it's bolts weren't stock i/e too long. If I figure mine out I wil post.
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Unread 07-23-2013, 03:42 PM   #6
CJ51973
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The inspection plate for the torque converter goes UNDER the plate on the engine behind the flex plate. So bell housing, inspection plate the e gine plate. i had mine backwards of this. I will keep you posted but so far so good. It's weird it only did it warm.
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Unread 07-23-2013, 06:17 PM   #7
superj
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Cool. Hopefully its fixed
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Unread 07-23-2013, 06:49 PM   #8
jay-h
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Quote:
Originally Posted by jr4x4 View Post
.... please any help would be great. im about to loose my mind. everything is torqued to speck. I spray painted the first plate and there where no rub marks. what is hitting???
I had an issue like that which was caused by a bend in the cover plate hitting the flex plate bolts, but just very lightly.
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Unread 07-24-2013, 05:51 AM   #9
jr4x4
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ok 3 cracked flexplates later. i found my torque converter is shot. its cracked around the whole nose & the shaft. bought a new converter through aamco & it wont seat. so i brought them the whole tranny & they cant get it on. they agree its the wrong converter. so i go back yesterday & they say it is the right one. eeerrrrr. but they still cant get it on. long story short. i left them the tranny with old & new converter & they promised they would get it right for today. i told them its a tf999. with no lock up. the converter shop told them its not the wrong one & that jeep used one converter for that. so im guessing that my noise was from my old T/C. il keep you all posted. thanks...
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Unread 07-24-2013, 08:41 AM   #10
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When I had my tf999 rebuilt, there was a similar compatibility problem and they had to drop the trans (unfortunately since I did not talk to the mechanics I'm not sure exactly what was changed) but it caused a grinding starter noise.

I suspect there are some oddball flex plates / torque converters out there.
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Unread 07-24-2013, 08:59 AM   #11
jr4x4
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Quote:
Originally Posted by jay-h View Post
When I had my tf999 rebuilt, there was a similar compatibility problem and they had to drop the trans (unfortunately since I did not talk to the mechanics I'm not sure exactly what was changed) but it caused a grinding starter noise.

I suspect there are some oddball flex plates / torque converters out there.
wow what did u do. my starter is grinding flexplate like once every revolutuon. new starter & flexplate.
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Unread 07-24-2013, 09:46 AM   #12
jay-h
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In my case the trans shop took it back and when it was returned, the problem was gone. Unfortunately when I picked it up, there was no one available to explain what they did. I regret not pursuing further, but that was a couple of years ago, with no further problems.

To be specific, the grinding I experienced was not the 'starter spinning but engine not ' situation. My engine cranked but gear noise was very loud
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Unread 07-24-2013, 09:59 AM   #13
superj
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there are different starters and flywheels for the 4.2, depending on what year. if you get one year starter but get a different year flywheel, they can either grind or not reach the teeth to turn it
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Unread 07-28-2013, 05:26 AM   #14
jr4x4
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update

so new. (3rd) flex plate and new torque converter aamco confirmed that tranny pump and all is good with tranny. I put averything back together yesterday. when I went to start engine I got a weird scraping/scratching sound from starter when its turning. starter is brand new. ( 1 week old). other starter kind of did same thing just not as bad. but I noticed a ticking noise again at idle. almost like a ball bearing tapping around. it is loudest under jeep. but of corse you can here it standing in front of engine. like the sound is traveling through the crank. what the hell is going on??? im about to give up. 900 miles on new 4,2 new water pump distributor icm flex plate tourque converter motor mounts, tranny mounts, u joints. axle u joints,tires, rims, lift, bushings, gas tank. electric fuel pump, weber carb,team rush w/msd coil, welded floor boards, tj flares, shocks and on. could it be in the lower engine? all I hear is a hum when I listen with my stethoscope. after a drive it seems to go away. please Jeep Forum I need some help here bad. thanks again..
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Unread 07-28-2013, 06:07 AM   #15
jay-h
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I'd go back to the starter. (Are you getting them from Autozone? I've had terrible results there). I had one starter (Autozone) where the gear did not fully retract and would erratically touch the flywheel. One experiment would be to space the starter out with a washer at each bolt and see if that changes anything.
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