Seeing that mark, makes me think rear cover bolt for sure.
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Little late, but a bit ago I disassembled one of my transmissions to check what parts I needed for a rebuild. I inspected the differential and other parts to see what needed to be replaced. I put the differential with the output shaft on a tray under the car in the garage. About 6 months later (without moving it at all). Still without moving it, I looked at it and it had an obvious crack in the casing of the differential. This was over winter so it appears it was weak and then from the expand and contraction, cause sometimes I would run a heater in the garage, it developed a crack. Car was supposed to have about 300 whp at that time.
I thought for sure too but I see no rub marks on ANY surface anywhere on the back of the motor and with it mounted it looks to be at least an 1/8" away at all times. Here's how bad it looks in rotation though... I had 4 of the bolts back in kinda snug is all but you can sure see it
Bent flex - YouTube
It would be different to be able to see a crack. At least then I would have the reason why it just all of a sudden started this. I find it hard to believe it's been bent for however longs its been bent and hasn't shown any signs til now. The last time I had it apart was for the trans and that was this time last year I think, and its got maybe 3k miles on it since then. Ended up being a great excuse to install my heads and cam that were just sitting in a box though![]()
But you know that something rubbed...and now it's bugging you and I both.
Have you slid the TC off the trans yet? I'd think that if the flex was warped...it would have straightened over a year being bolted to the TC.
Even with it running on the car though and my flashlight between it and the motor I still didn't see anything hit... Nothing really lines up just right with that rub mark around the back either...
No, I haven't really even looked at it cept to bolt a strip of wood to the case to keep it from falling out when I rolled it around the drive the other day. I'll be pulling it now to check it best I can for straightness though now that you mention it. That's the other thing I don't get, if it was bent, its been bent for a year and running fine. The TC to flex bolts all felt liked they were torqued the same when I removed them but I used my impact on the flex to crank bolts and they seemed to come off pretty easy(none were backed out though)... Before it occurred to me to use a wrench and really check tightness I was done. Damned speedy impacts...
Ehhhh all us cool kids use impacts. If none were backed out..likely there was no issue. I've heard/seen a couple flexes be off a little bit like yours. But...why?
Impacts FTW!!! Pretty much what I figured... Exactly whats driving me nuts here.
Got my parts all today and 1 yesterday and I'm not very happy...
Let's start with Intense: These guys forgot my ARP lube, and my ARP flex bolts. And instead of the head stud kit I clearly ordered I got a main stud kit which I didn't realize til I opened the box and only saw 8 studs. So hopefully I can even return that to them.
Then Rockauto: Not nearly as bad but I specifically ordered the valve cover gaskets and grommets set I did cause it had a picture of the grommets being blue which no other set had pictured. I'm pretty sure the ones I picked made it ship from a different location costing me like 8 extra bux when I could have had a better brand name and saved shipping.
/rant
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