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heres a few pictures of what I've got. Its a blue tag zf6 and all the parts from the same car. The only thing I didnt take was the flywheel, which im replacing with a factory 4+3 flywheel.
I'm spacing out the clutch fork to correct the clutch depth issue, and I made a new slave pushrod to make up the gap My specialty clutch alignment tool
Last edited by Connerdsny; 04-18-2018 at 12:05 AM.
It seems you're well underway. You mentioned blue-tag so that would hint the housing would be 'Magnesium' and when used with the LT1/4 there were spacer/shim/insulator between housing/engine and housing/trans. Their relevance is sometimes disregarded or argued. I've done neither but I thought I would mention. Your snapshot of the housing doesn't display it so here's an assembly from FSM for LT1 and a snapshot of what I believe you 'should' find.
Awesome! You'll be happy with the zf6. It sounds like you know what you are doing so Ignore the negativity towards this swap. YES IT IS WORTH IT!!! I did it on my 86 years ago. Figuring out which parts you need is part of the fun. Would I do it again? You bet! It's not that complicated. It was a fun project and made my car much more enjoyable to drive. I love threads that show people what you can do and how you did it.
Thanks for the support and help!
I do have the shims, I just forgot to put them in the picture. I was wondering if they were inportant or not....
Hole is cut The new starter compared to the old one. I had to grind a little off the new one to make is sit flush
Since im using the later car's clutch pedal, I had to modify it to make it fit. They look the same at a glance but they are definitely different shapes.
I still need a clutch hydrolic line (mine is leaking), the correct transmission oil, and a longer starter cable and it'll be ready to test!
How short is the cable? I think the later 'denso has a terminal adapter added to it that if removed might do what you need. Yours looks to have that terminal adapter. You're certainly moving along! Make sure you can remove the fill and drain plugs before you start the 'top off' or replacement. M17 HEX for removal.
How short is the cable? I think the later 'denso has an adapter added to it that if removed might do what you need.
its about 4" to 6" short. I saw someone mention in another thread that a longer starter cable was needed, but I didnt believe them until I got the new starter in... I'm not sure how I lost 6 inches. I guess its just the positioning of the newer terminals.
I'll say. Two days? You gotta be single. I used to bust out project like that, with that much ambition....now days things progress much more slowly, because...you know, life/family/job etc.
Nice work and effort. I'm digging the ambition and real progress.
How is the shifter clearance with the original auto tunnel?
I converted my 87 auto to ZF way back. I did not change my prom, and did not have issues. But my car was quite modified already and the prom to match prior to ZF conversion.
The mods to the auto tunnel were quite minimal. Basically just the cut-out for the ZF shifter. The 89 console (or 4+3 console cover) works great with the shortened B&M shifter.
It's alive! I've been driving it all morning it took a new clutch master and some "adjusting" of the clutch linkage.
now I've got all the little things to finish up- reverse switch, speedo calibration, clutch switch, and making the interior look pretty. And a car wash is probably in order...
the car has actually been down for months while it waited for a transmission, since I got it on Sunday I've barely slept trying to get it done I've been driving a saturn ion and I couldn't wait to get my corvette back
04-18-2018, 12:00 AM
85 auto to zf6 conversion
I used to bust out project like that, with that much ambition....now days things progress much more slowly, because...you know, life/family/job etc. 
it took a new clutch master and some "adjusting" of the clutch linkage. 
