4l80 not dyno proof!! a little help please
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Teching In
Joined: Dec 2005
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From: Soddy daisy tn
4l80 not dyno proof!! a little help please I put my 68 impala on the dyno today! 6.0 iron block ls6 intake tr 224 cam and headers with a stock 4l80. At 5200 it BROKE LOOSE from the block and took out the whole bellhousing and at least one ear off the block and the drive shaft in half but left the yoke still in the trany. No tailshaft damage but I now have a 4l80 with no bellhousing. HP was at 320. Any help would be appreciated. Thanks Woody
Thread Starter
Teching In
Joined: Dec 2005
Posts: 44
Likes: 0
From: Soddy daisy tn
tey it was all stock but once I got it on a lift I found out what happened. The rear u-joint let go and the driveshaft got loged between the pipes and the floor and the sudden jar I guess split the bellhousing all the way around. I have pics I took just because I had never seen it before.
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