geckonz08

Really considering a 200-4r upgrade.Have one in good order already sitting in the caddy which is getting a 425 toro engine .This motor will be only slightly modified -ported heads ,O4B intake , custom headers , slightly better cam .
Would the upgrade kit (below) bring the 200 4r up to speed to handle the 425 ??

http://shop.actautomatics.com/produc...1&productId=73

Thanks mike

joe_padavano

Not even close. The turbo Buick community has found and fixed more failure points in the 200-4R than you can imagine. At an absolute minimum you also need a heat treated stator shaft and a forward clutch drum with a steel billet shaft. I've busted these parts with a 307. Depending on whether you prefer an east coast or west coast vendor, here are two of the best for 200-4R parts:

http://www.ckperformance.com/resourc...SMISSIONS.html

http://www.cpttransmission.com/2004R_trans_2to4.htm

geckonz08

Thanks joe -that is a great answer . Left no room for doubt.!!! Probably the west coast because I can get the kit sent to my brother`s L.A. address.
mike

68conv455

I wouldn't call this a Kit. You need to replace numerous hard parts.

scubastever

thanks Joe!

88 coupe

Your most logical choice:

California Performance Transmission
5502 Engineer Dr
Huntington Beach, CA 92649
(714) 901-3777

Tell Art what you want, and have him put it on "Will Call" for your brother to pick up.

Norm