406 with 4+3 trans
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
When I went to the strip, and ran my first run, the car went 12.5 @ 115mph with a 2.6 sec, 60 foot and when I left to go home, there was no OD.
I had OD on the way and for weeks before, I had just changed the fluid and hoped it would be OK, because everybody talked about the Calloway turbo cars being so strong and having the 4+3, but it did not work for me....
So I bought a ZF only because at that time, no one made a TKO swap kit and I did not want to fabricate my own kit,
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
I haven't put the 406 in yet.I don't plan on drag racing the vette.I have read about other forum members using the 4+3 behind built motors and they seem to hold up. How long I don't know.Looking at Larry's experience I think I better have a plan B.I would love to put a TKO 500 in like Larry did but that's alot of money.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
I must say, I LOVED the 4+3 in a major way, it was an awesome tranny and a great concept, I don't think there has bee na 7-speed manufactured since, I loved the kick down.
I call several places and asked for them to "beef it up" and they said that they could, but they would give me no warranty.
I if ever put the 350 back in, I will probably put a 4+3 back in it!
I call several places and asked for them to "beef it up" and they said that they could, but they would give me no warranty.
I if ever put the 350 back in, I will probably put a 4+3 back in it!
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
I haven't put the 406 in yet.I don't plan on drag racing the vette.I have read about other forum members using the 4+3 behind built motors and they seem to hold up. How long I don't know.Looking at Larry's experience I think I better have a plan B.I would love to put a TKO 500 in like Larry did but that's alot of money.
My new motor will be in the area of 550/550 at the crank. It will be a good test for the old tranny. I heard the 87/88 4+3's were the strongest of the bunch. I certainly hope so!
I have one last slalom event to attend on July 19th, then I will be working on pulling the 350.
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
I can't remember off the top of my head what forum members are using the 4+3 on built motors.I just remember following some threads on the forum.Some had good things to say, some not.Maybe Larry's source for beefing up the 4+3 is a good way to go.I'd like to know what they do to make them stronger and the cost.Nice horsepower numbers Black Z,keep us posted when you switch motors.
Last edited by steven mack; Jul 9, 2009 at 07:35 PM. Reason: add info
