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#1 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Truck is parked
Sigh, those of you who visit the engine and drivetrain section probally already know that I didn't install the tranny right. The flexplate appeared to be bent as I cranked the truck truck over, I swapped a new flexplate on, and it still did as much, so that means the crank is bent. Transmission is probally fried too. So the GMC is off the road for the winter. Gonna get my little Toyota pickup registered and insured, drive it for the winter. I guess this is as good of time as any to start swapping stuff between the two trucks. The cab, wiring, driveshaft transmission and front clip from the GMC are going to the Chevy. I'll also be buying and installing new heads on the TPI 350, breaking the cam in on it, then installing the TPI, and eventually installing it into the ex-chevy. I also need to do some sheetmetal repair on the cab of the GMC, needs new cab supports, along with fixing little dings in the rest of the body. I hope to have it running the TPI 350 / TH400 combo and have it in primer by spring next year.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) Last edited by Russell; 10-16-2004 at 11:31 PM. |
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#2 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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GOOD FOR YOU MAN... IT'S WINTER ANYWAY.....
THING'S HAPPEN FOR A REASON...... YOUR TRUCK MUST HAVE BEEN CRYING FOR HELP !!!!!!! ![]() ![]() ![]() ![]() ![]() ![]() |
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#3 |
Account Suspended
Join Date: Dec 2003
Location: Texas
Posts: 2,686
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How does a crank get bent?
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#4 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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I dunno Don, I would have guessed the flexplate to bend first, but I know the new one is straight, and it still wobbles something nasty.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#5 |
Account Suspended
Join Date: Oct 2002
Location: Elkhart, IN
Posts: 6,400
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you cant bend a crank. it will break, not bend. my bet is that the new flexplate is bent too. all the bolts tightened to proper torque and in the proper sequence?
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#6 | |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Quote:
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#7 |
Account Suspended
Join Date: Oct 2002
Location: Elkhart, IN
Posts: 6,400
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cast iron wont bend, the crank is made from cast iron. what sequence did you use to torque the flexplate bolts?
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#8 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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The one in my chilton's manual, each to 35 ftlbs
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#9 |
Registered User
Join Date: Sep 2003
Location: Lewisville, NC
Posts: 1,836
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the flex plate on my truck will wobble some, maybe even up to a 1/2", but if you don't get the torque converter in your tranny all the way it will bend that flex plate when you tighten the bell housing bolts, ask me how I know that
![]() And I also have never heard of a bent cast iron crank, steel maybe, but I don't think cast iron will bend.
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1985 Scottsdale Shortbed 4x4 Stout 350 with some "upgrades"-700r4-33x12.5" Mud Tires, Warn 8274-50 winch. 2005 Chevrolet Colorado Regular Cab 2wd 4-banger, 5 speed, Street Pack with 3.73 axle. |
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#10 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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You know what... You're right... There is no way that crank is bent... I can only imagine the forces applied while those pistons whip around at 4000 rpm....
I'm gonna get under the truck and take that plate off again, check it for straightness again, see if the center is bent or something, and make sure that I didn't get some crud between the flexplate and the crank...
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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#11 |
Account Suspended
Join Date: Dec 2003
Location: Texas
Posts: 2,686
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Sometimes its hard to get the flexplate on all the way try cleaning the crank hub with a wire brush Ive gotten aftermarket flexplates that would not fit and i have to massage with a die grinder.
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#12 |
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Join Date: Sep 2004
Location: Nebraska
Posts: 134
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What is the flex plate is it the big gear next to the Torque converter?
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1976 Chevy K10 CheyenneTrue Duals with glasspacks and cutouts, Blacked out tails, Rockford Fosgate H/U with 2 Sony Xplode 6x9s and 2 8" MTX Subs with a Alpine Amp. New front clip in primer. For Sale $2000 obo |
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#13 |
Registered User
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
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Yes it is. The torque converter bolts to it.
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#14 |
Registered User
Join Date: Jun 2004
Location: Lake Charles, LA
Posts: 206
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yeah you might call it a flywheel i called an auto parts store for a flexplate and they said there wasnt one for my truck just flywheels autos have flexplates and manuals have flywheels im not sure really what the difference is though
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#15 |
Registered User
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
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A flywheel is much thicker and cast iron instead of steel(read; much heavier)
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#16 |
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Join Date: Sep 2004
Location: Nebraska
Posts: 134
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Ya I always thought it was the flywheel. My Flexplate is rubbing on something and is making a ticking sound. Is there a way to take it out with the engine and the tranny together?
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1976 Chevy K10 CheyenneTrue Duals with glasspacks and cutouts, Blacked out tails, Rockford Fosgate H/U with 2 Sony Xplode 6x9s and 2 8" MTX Subs with a Alpine Amp. New front clip in primer. For Sale $2000 obo |
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#17 |
Registered User
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
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No, they have to be separated. pull the inspection cover and see if it goes away. Sometimes the cover just needs to be repositioned. I've never seen it in a pickup, but, I have seen flexplates break near the center. Sometimes all the way around.
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#18 |
Account Suspended
Join Date: Dec 2003
Location: Texas
Posts: 2,686
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Sometimes the dust covers get banged up and get dented into the flexplate. Check for signs of wear and shinniess
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#19 |
Registered User
Join Date: Dec 2003
Location: here
Posts: 5,789
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The first thing Id check is the converter (like Destructo said). The easiest way to make sure you have the converter all the way into the front pump is with the flexplate unbolted to the converter you should be able to slide the converter back & forth away from and toward the flexplate. If its not in all the way it will bow the flexplate.
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#20 |
Registered User
Join Date: Jun 2004
Location: fargo N.D.
Posts: 80
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flex issue
very important to make sure the converter is in correctly you can cause some serious damage to the transmission if the pump is not driven by the converter, i have learned the hard way as well!
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#21 |
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Join Date: Sep 2004
Location: Nebraska
Posts: 134
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Oh ok. I already took that dust cover off and it still did it. I see were it is rubbing. The P.O. installed the tranny himself so it is probably installation error. Geesh this truck is full of surprises from the po.
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1976 Chevy K10 CheyenneTrue Duals with glasspacks and cutouts, Blacked out tails, Rockford Fosgate H/U with 2 Sony Xplode 6x9s and 2 8" MTX Subs with a Alpine Amp. New front clip in primer. For Sale $2000 obo |
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