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Thread: T-56 major problems need help???
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07-28-2007, 11:04 AM #1
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red- 1998 camaro z28
T-56 major problems need help???
Last night i was racin some built 5.0s and made the great mistake of dropin from 3rd to 2nd instead of goin to 4th yea i know. Well now i can smell exhaust fumes somethin horrible and i believe the tranny is knockin but i drove it 30 min home that night and all the gears shifted fine, my clutch seemed normall but the car idles at 500 rpms the whole motor and tranny shake and its knockin but i cant pin point it. I really hope u guys can help me out? thanks in advance. Oh and by the way i pulled 2-3 cars on the built stangs and got it on tape to so it was still a good night
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07-29-2007, 10:53 PM #2
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Black- 2002 Formula Firehawk
it might not be the tranny. These trannys are strong. You probably bent a pushrod
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07-30-2007, 02:53 AM #3
the FOOTAGE!
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07-30-2007, 04:38 AM #4
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07-30-2007, 07:48 AM #5
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red- 1998 camaro z28
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07-30-2007, 08:26 AM #6
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Black- 2002 Formula Firehawk
also u said you heard a knock maybe you need to replace your tranny mount
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07-30-2007, 09:21 AM #7
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Hugger Orange/W stripes- 1999 Z28 M6
The price sounds okay, but I've not had the privilege of replacing mine (and I hope to keep it that way). If it's like anything else on an F-body engine, the cowling will probably be the biggest pain. I haven't heard of the pushrods being a big deal on an LS1 valvetrain.
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07-30-2007, 11:12 AM #8
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red- 1998 camaro z28
That could be i will crawl under there again today and see i find ne thing i know it was shakin like a mad man when runnin but so was the motor and with the bent rod im sure the tranny mount is ok but u could be right. Thanks for all ur guyses help and if ne one knows the easeist way or ne tricks on changing these please let me know.
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07-30-2007, 04:19 PM #9
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Black- 2002 Formula Firehawk
Tranny mount is more elbow grease than anything. When i changed mine all i knew was where it was. Pretty simple. Im sure if you do a search youll find a how-to page. Im too lazy to type all of it anyways
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07-30-2007, 07:27 PM #10
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red- 1998 camaro z28
wow i took my rods out 6 of the 16 rods were extremely bent and the others might of had a slight bend that i couldnt notice so i got all new rods, plugs, and plug wires while i had crap torn apart i will let everyone know if my probems go away.
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07-31-2007, 03:15 AM #11
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Hugger Orange/W stripes- 1999 Z28 M6
Holy high RPM Batman!!!!
Check your valves and springs too. Make sure none of them were damaged.
Did you go back with OEM pushrods or did you use stronger ones?
The reason I say that is the whole reason the pushrods bend is valve float. The stock springs are only good for around 6200 rpm and any more than that causes the valve to hang open momentarily because the return spring isn't strong enough to keep everything synched. The play gets the pushrod slapped instead of pushed and it can bend. I mention the valves because they were likely slapped closed by the piston. More often than not (I hear), the valves are okay, but a broken spring is a possibility. Might as well look at 'em while she's opened up. Aftermarket springs are a quick and effective way to bump up safe rpm limits. Seems like 500 rpm more is the norm. Still, the mechanical excess of rpm's that you probably did was in the 7300 range. That will take a lot more to handle!!!
Good luck.Last edited by jad628; 07-31-2007 at 03:22 AM.
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07-31-2007, 06:00 AM #12
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red- 1998 camaro z28
I believe all the valve springs were ok and yes i purchased comp cams chromolly pushrods i didnt want to buy crap again when ive got it torn apart. I also purchse some 10.4mm taylor plug wires and new plugs so im hopin all goes well when i get my orders in. Thanks for you help i will check everything again when i get home it was gettin dark last night so i quit, i will update u later.
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07-31-2007, 06:46 AM #13
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07-31-2007, 10:00 AM #14
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07-31-2007, 03:07 PM #15
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Black- 2002 Formula Firehawk
hey miller456, when you bent them rods did you hear some kind of ticking noise when the engine was cold? Maybe is not a ticking, it sounds more like a quiet slap. The reason why i ask is because my engine makes that noise
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07-31-2007, 04:02 PM #16
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red- 1998 camaro z28
Yes i did have a knocking but it did it no matter what temp the car was at. Also it would run smoother at about 2k and make that exact noise ur describing but u have to understand i bent almost half of the 16 rods pretty good so my idle was super rough and had a bad exhaust leak cuz most of the bent rods were on the exhaust side. If you had a bent rod like that your SES light would come on and flash at you and the car most likely would idle rough. If you have ne more ?s let me know. Also i believe what you are hearing is the normal piston slap that a lot of our ls1 cars make from factory and its just something GM has said is normall.
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08-01-2007, 08:31 AM #17
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08-01-2007, 08:41 AM #18
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red- 1998 camaro z28
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08-01-2007, 10:21 AM #19
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Black- 2002 Formula Firehawk
getting true duals pretty soon, might also get LT's but dont know for sure
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08-01-2007, 11:26 AM #20
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red- 1998 camaro z28
Very nice hopefully all goes well for u then the LTs would be really helpfull to get rid of that crappy stock y pipe we have.
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