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I swapped out the transfer case. The transmission was

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I swapped out the...

I swapped out the transfer case. The transmission was shifting fine before the swap. Got everything together now the gear indicator on the dash blinks in any gear and the truck acts like it's in neutral and doesn't want to go back into park w/o grinding

Mechanic's Assistant: How old is the transmission? Have you checked the brake switch?

2001 Allison. Bake switch??

Mechanic's Assistant: What is the model of your '01 Chevy?

2500hd gmc 4x4 6.6 with Allison transmission

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes. Replaced the nsbu switch

Submitted: 3 months ago.Category: Chevy
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Answered in 1 hour by:
3/25/2018
Chevy Mechanic: Jerry Newton, Chevy Technician replied 3 months ago
Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified

If it's not moving, and when you put it in park you get that loud, ratcheting noise, then your transfer case is in neutral. Try shifting the transfer case and see if you can get different ranges out of it.

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