86 Gear Box Design Question
Thread Starter
Instructor
Joined: Oct 2006
Posts: 246
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From: Elk Plain WA
St. Jude Donor '11
86 Gear Box Design Question
Is the 4 speed gearbox in the 86 Corvette basically a Muncie 4 speed with the Nash OD on the tail end?
If I want to get synchronize parts where is a good source?
Thanks
If I want to get synchronize parts where is a good source?
Thanks
Last edited by tdf; Dec 11, 2007 at 12:18 PM. Reason: add
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
It's actually a Super T10 design, (very close to a Muncie). The whole trans was manufactured by Doug Nash Engineering though, not Borg Warner.
Try Tom's Differentials for parts, he's up in Idaho now. The parts are nothing special. I had terrible luck with the rebuild kits, some of the thrust and bearing washers didn't fit so I had to reuse the originals.
Try Tom's Differentials for parts, he's up in Idaho now. The parts are nothing special. I had terrible luck with the rebuild kits, some of the thrust and bearing washers didn't fit so I had to reuse the originals.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Sounds like synchros, if it comes out when you let off the throttle at mid/high rpms. Hopefully the engagement dogs on your gears aren't chewed up from "gear grinding" when it slips out. If those are heavily damaged, gears are about $100+ each.
Worn shift forks can also contribute to this. Are you doing the work yourself or farming it out?
You have to gut almost the entire transmission to do the synchros, so you're gonna want a small parts kit and the gaskets. I spent about $800 going through my trans because I had to replace most of it, in hindsight it was a stupid idea, but at first I thought I was only doing synchros.
Worn shift forks can also contribute to this. Are you doing the work yourself or farming it out?
You have to gut almost the entire transmission to do the synchros, so you're gonna want a small parts kit and the gaskets. I spent about $800 going through my trans because I had to replace most of it, in hindsight it was a stupid idea, but at first I thought I was only doing synchros.
