C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

6spd ???

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Old Mar 30, 2009 | 05:42 PM
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Default 6spd ???

will lt1 bg 6spd or zf6 bolt up to an 85 witha 4+3 i want a manual but hate the 4+3
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Old Mar 30, 2009 | 05:45 PM
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The ZF6 will bolt up no problem. Whats a bg 6 speed? The only one that I know of used in F-bodies was a T-56.
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Old Mar 30, 2009 | 06:26 PM
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TKO 600 call Keisler

You can use the 4+3 BH and Hydraulics, Clutch FW etc.
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Old Mar 31, 2009 | 05:50 PM
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Originally Posted by Demonic85
The ZF6 will bolt up no problem. Whats a bg 6 speed? The only one that I know of used in F-bodies was a T-56.
The ZF6 bolts up to the ZF6 bellhousing no problem, but not to the 4+3 bellhousing.
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Old Mar 31, 2009 | 11:07 PM
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I converted a '87 4+3 coupe to ZF 6-speed with all the parts that came out of a 1994 wreck. I used an article I am sure I have somewhere that tells how to do this conversion. I can FAX it to you when I located it. I think it was written by the ZF Doctor (see below) out west, maybe in Arizona.

E-mail billb@zfdoc.com or call Bill Boudreau at (602) 319-6575.

http://www.zfdoc.com/



http://grand-sport-replica-build.synthasite.com/

Last edited by corvette1987coupe; Apr 6, 2009 at 11:38 PM.
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Old Apr 1, 2009 | 07:41 PM
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Default zf6 speed

i put a zf6 speed(new $1500) in my 86 4+3.i used my
original flywheel, new clutch,new bellhousing,new smaller
starter motor and some patience.just like everything
else after you do it you realize it was not that hard!
Good luck.
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Old Apr 1, 2009 | 08:03 PM
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Originally Posted by jacksdad
i put a zf6 speed(new $1500) in my 86 4+3.i used my
original flywheel, new clutch,new bell housing,new smaller
starter motor and some patience.just like everything
else after you do it you realize it was not that hard!
Good luck.
Did you use the stock ball pivot stud or the ZR1 stud?

Clutch disc was a sprung or unspring disc?

New clutch slave?

New Yoke ?

Cut the tunnel?

Speedo corrector for the 3.07 gear?

Not trying to be a but, just trying to relay all of the info to the OP

Last edited by LD85; Apr 2, 2009 at 02:32 PM. Reason: spelling
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Old Apr 2, 2009 | 11:01 AM
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I did the ZF swap in my '87 replacing the 700R4. I have done several others, and though a bit of work, all seemed to be happy with the end result.

Though in retrospect, if I wanted a ZF, I would just buy a later model standard vette.
Aaron
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