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4l60e swap help (bolts)

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Old Jun 9, 2016 | 07:35 AM
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Default 4l60e swap help (bolts)

Me and my brother are doing a transmission swap on my 1999 z28..
Everything's going fairly smooth at the halfway point.. I was going over the hardware and can't figure out what these bolts go to. They're 13 mm- 1¼ inch total length. 10.9 grade
Any ideas? Thanks in advance
Attached Thumbnails 4l60e swap help (bolts)-20160608_193147.jpg   4l60e swap help (bolts)-20160608_192416.jpg  
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Old Jun 9, 2016 | 08:19 AM
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Bell housing of trans to engine bolts are what they look like. But you only have 4? Normally have 8.
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Old Jun 9, 2016 | 08:24 AM
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They look like the 4 tunnel brace bolts. When you say they are 13mm bolts, do you mean that a 13mm wrench fits the head of the bolt?
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Old Jun 9, 2016 | 11:42 AM
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Yeah i have all the bell housing bolts
Yes i meant 13 mm head
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Old Jun 9, 2016 | 11:55 AM
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There is a wavey piece of steel that runs across the tunnel, tunnel brace, that is about a foot and a half back from the transmission cross member. Just a guess but possibly the bolts to that. I don't have mine in anymore so I can't check the size
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Old Jun 9, 2016 | 11:56 AM
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Originally Posted by bbond105
They look like the 4 tunnel brace bolts. When you say they are 13mm bolts, do you mean that a 13mm wrench fits the head of the bolt?
Sorry, didn't see this this before my post but this is my vote also
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Old Jun 9, 2016 | 08:01 PM
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those bolts match the parts layout catalog for the bolts for the floor tunnel reinforcement bracket M8x1.25x30(1.2") grade 9.8.
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