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4l60e jammed manual first and jammed reverse after rebuild

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Old Oct 15, 2019 | 05:13 PM
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Default 4l60e jammed manual first and jammed reverse after rebuild

My buddy’s 60e has been sitting on my bench for a few months disassembled for rebuild, over the weekend we had time to do a quick rebuild and everything seemed to go smooth until we went to run the car through it’s gear on jack stands, the issue we are having is when I put the shifter in manual low 1stgear and reverse the transmission is locked up as if it’s in park, you can hear the transmission engage into gear but it’s just locked up, the wheels will spin when I put the trans in overdrive but I didn’t want to run the car anymore to prevent any further damage, could the sprag be in backwards? Or a issue with the aftermarket servos? Or a valve body issue? I have only rebuilt one other 60e before this and didn’t have any issue. Any help is appreciated thanks fellas
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Old Oct 15, 2019 | 05:21 PM
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Forward sprag assembled backwards.
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Old Oct 15, 2019 | 06:51 PM
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It will have reverse with the fwd sprag in backwards.

It won't have reverse if there a valve body bolt in the wrong place and locking the sunshell.
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Old Oct 15, 2019 | 07:04 PM
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Originally Posted by Jays_SSZ28
It will have reverse with the fwd sprag in backwards.

It won't have reverse if there a valve body bolt in the wrong place and locking the sunshell.
which bolt can be in wrong? I was told this buy someone and I think it’s my issue
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Old Oct 15, 2019 | 07:39 PM
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Try this https://cimg9.ibsrv.net/gimg/ls1tech...f4bbd869cc.png

I've never had a problem with this so I don't know exactly which ones would cause this problem. I'd guess the center bolts.
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Old Oct 15, 2019 | 08:44 PM
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'quick rebuild'
'no forward movement'

Sounds like a recipe for disaster
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Old Oct 15, 2019 | 10:06 PM
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Old Oct 16, 2019 | 05:47 PM
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Originally Posted by grasshopper645
'quick rebuild'
'no forward movement'

Sounds like a recipe for disaster
thanks for the positivity and help, much appreciated
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Old Oct 16, 2019 | 05:48 PM
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Originally Posted by Jays_SSZ28
Try this https://cimg9.ibsrv.net/gimg/ls1tech...f4bbd869cc.png

I've never had a problem with this so I don't know exactly which ones would cause this problem. I'd guess the center bolts.
This was the problem bolts where installed
wrong, I have all my forward and reverse gears back problem solved thanks
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Old Oct 16, 2019 | 06:57 PM
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Glad I could help.
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