Mystery noise when in drive. Video..

[Fldawg]

quality flex plates slove that probelm especally with stall converters and good bolts also

[Tmend]

I have had a flex plate make that noise but remember it spins at all times it's bolted to the egine. Putting it in gear drops rpm level therefor making the flex plate spin slower and causing less wobble. I can hear the noise a lil in park or neutral the best way to solve it is remove the bolts from the torque converter and push the converter back it should move about half an inch. Once this is done try it again if it continues you most likely have a rear main bearing issue if it's gone then you know it's in your trans....my guess to at fist would be flex plate but I've seen it be the bearing. If noise is louder once ruck is worm it's definitely the rear main bearing.
Posted via Mobile Device

[Tmend]

I forgot to when you have the converter lychee back you will need to simulate the rpm drop on the egine since putting it in drive won't do anything....just turn your idle screw but count them so you can return it to the same location.. Just saw the video again and the noise is there even in park or neutral good luck let us know bud.
Posted via Mobile Device

[eightbanger]

Originally Posted by Tmend

I forgot to when you have the converter lychee back you will need to simulate the rpm drop on the egine since putting it in drive won't do anything....just turn your idle screw but count them so you can return it to the same location.. Just saw the video again and the noise is there even in park or neutral good luck let us know bud.
Posted via Mobile Device

Will do Tmend...and thanks for the input.

[tooter]

I think you will find the flexplate cracked at the bolts where it bolts to the crank. My 69 Camaro did the same exact thing an took a week to find it.

[biggestjohn]

Did you ever solve this? Come on man, I hate getting 3\4 the way thru a mystery and never finding out what happened. Inquiring minds want to know.

[eightbanger]

Originally Posted by biggestjohn

Did you ever solve this? Come on man, I hate getting 3\4 the way thru a mystery and never finding out what happened. Inquiring minds want to know.

I agree with you John I hate that myself...believe me I fully intend on posting the end result of this mystery, I told Tmend that I would be pulling the FP out last weekend, but as I live in the U.K the weather had other plans and decided to piss down from Saturday till Monday..I did pass by our local American auto repair shop, today in fact, and they were convinced also that the prob is a cracked FP, I tell ya! I really hope it is because I can't afford another Torque converter or having the Tranny sent off again.
Meanwhile some pics of my local "American Iron" shop...

[Frkypunk70]

Wow!! sweet U.S. iron. I would kill for that elcamino. I believe that is the first year of it. Nice Monza, Skylark and 50's pickup too. Must be nice not to get shocked when you work on old American Cars. Personally I like watching the people who buy old MG's and Healey's get jolted here. Cool Pics!

[eightbanger]

Originally Posted by Frkypunk70

Must be nice not to get shocked when you work on old American Cars. Personally I like watching the people who buy old MG's and Healey's get jolted here. Cool Pics!

Ahh Lucas Electrics...I think they made them like that to keep the guys on the assembly lines awake.

[Frkypunk70]

Well, its no different with my last restoration it was a MK1 Golf(Rabbit here)had a bugger of a time with the fuel injection. Learning curve, now I stop and help golf owners every time I see one broken down side of the road.

[eightbanger]

OK! Small update on this, I suported the front of the Trans with the Jack unbolted evrything and slid it back on the crossmember, then unbolted the FP...and
Nothing! no crack of any description. Put it all back together and for a small time the noise had quitened but not gone, so in frustration while driving the other day I floored the go pedal to see what would happen and now the Truck lurches/judders in reverse and forward gears, kinda like putting your truck in gear and instead of giving it steady gas you dab the pedal on and off this only happens while moving slowly, once underway that goes, so now I am looking at the Torque Converter as the suspect, and it's looking very likley as a little Googleing has informed me that when a TC is showing signs of failing you get a thing called "Torque shudder" which could be what i'm feeling and that they can make a ticking sound which I have on the video.

[too much stuff]

I wish you would hurry up and fix this already! I see it looks like maybe the torque convertor bolts were loose at one point? They look kind of wallowed out to me. were they tight when you dissasembled? And did you check the flex plate closely? Sometimes it is hard to see the cracks. Good luck, Eric

[eightbanger]

Originally Posted by too much stuff

I wish you would hurry up and fix this already! I see it looks like maybe the torque convertor bolts were loose at one point? They look kind of wallowed out to me. were they tight when you dissasembled? And did you check the flex plate closely? Sometimes it is hard to see the cracks. Good luck, Eric

I want it fixed already too and it was fixed 18 mths ago Tranny rebuild brand new B&M TC & FP and now I'm having to cover old ground.
Looking to buy a new T.Converter now...TCI, Circle D, & Yank, TCI are the most afordable of those three.

[68gmsee]

Also buy another flex plate. I agree that those holes are too wallowed out.

[60ratrod]

i haven't heard many good things about the B&M converters. but i have heard lots of great things about the tci trannys and converters. so i would get the tci in a heart beat. and i also thought that the holes looked elongated. i would buy a tci flexplate while i was at it if i were in your position

[trevrolet65]

Heah, the torque converter on my 454/400 has six bolts through the flex plate, it don't move back and forth. Check into R/V type stalls, they hold up to all the torque you can give them. The more bolts, the more strength, the more busted knuckles. Good luck.

[edhtrd71]

cracked flexplate

[Square_78]

My 78 c10 used to do the same thing. Ticking in gear and quiet in neutral. Then I lowered the tuck and the noise stopped. Hopefully it doesnt come back

[eightbanger]

Well the upshot on mine was indeed a faulty TC, found a whole lotta silver grey metal fillings in the trans fluid which had settled in the pan, so something had definately come adrift in that TC, and the debris went through the tranny which then needed to be rebuilt.
Went for a TCI converter in the end, and a fresh rebuild of the 400 and it's been running great ever since, I wouldn't recomend a B&M converter, don't think they're put together all that well.