Author Topic: Np205 syncro question  (Read 2568 times)

Offline Big Daddy

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Np205 syncro question
« on: April 11, 2016, 04:22:36 PM »
82 k30 with syncro t/c. Did a complete tear down to replace seals and gaskets.
Noticed some wear and chipped gear on large idler gear. Replaced the idler assembly
with parts from another case but then I read somewhere that the idler is different
between syncro cases and non syncro cases. Is that true? If so, can I change front
output to non syncro (shift fork, rear cover, etc)

Offline Engineer

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  • Posts: 1402
Re: Np205 syncro question
« Reply #1 on: April 12, 2016, 06:32:13 AM »
Do they look physically the same? If so they should interchange. Ratios didn't change so tooth count shouldn't be an issue.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline Big Daddy

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  • Posts: 18
Re: Np205 syncro question
« Reply #2 on: April 12, 2016, 05:59:55 PM »
guess Ill be shopping for a parts t/c

Offline Big Daddy

  • Newbie
  • Posts: 18
Re: Np205 syncro question
« Reply #3 on: April 16, 2016, 04:53:56 AM »
Not to bad of a swap. Took about an 1 1/2 hours

Offline Engineer

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  • Posts: 1402
Re: Np205 syncro question
« Reply #4 on: April 17, 2016, 06:11:29 AM »
Good deal.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout