200r4 shift points

We installed a rebuilt 200R4 tranny in our '59 El Camino and everything is working fine except the unit shifts just a little too early. The TV cable is adjusted correctly, all the pressures read right at the various operating conditions. I am thinking we need to adjust the weights/springs on the governor to zero in on best shift points. Anyone have any experience on doing that? I have read various recommendations from cutting off a bunch of weight on the governor weights, removing a spring from one of the weights, etc. Anyone have a formula or is it just cut and try? Our governor has the heaviest weights available, tranny was evidently from a granny car. I have seen articles on performance trannys which show governors w/ way smaller weights.


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You best option would be to contact Chris @ CK Performance or Lonnie @ Extreme Automatics. Either could help with parts or tuning Info. It can be a pain doing trial & error with 2004R Gov, dropping Pan, draining Fluid.
What Code is the 2004R you have? Tag on right/rear.

HiPer & Standard Gov ID >> http://www.gnttype.org/techarea/tra...on/governor.jpg
GN/T-Type BR & BQ codes.
SS-Monte CQ & CZ codes.
Olds 442/HO OZ & KZ codes.
All these Govs are similar, SS-Monte has highest factory Auto shift points.
If you only want to raise your shift rpm/speed slightly you may only need to remove a Gov spring and change the Line Bias spring in the Valvebody etc...

SS-Monte & GN Gov Pics

Gove location

Attached Thumbnails

       

Thanx for the reply. I have to drop the pan and change speedo gears anyway so thought I could try the first cut then. I realize it will probably require several iterations but wanted to know a good starting place. Your suggestion to remove that spring seems a good start. I have seen that recommendation a couple times.

Might want to follow this thread on Chevelles

http://www.chevelles.com/forums/showthread.php?t=371666

Seems someone else is working on the same issue.
If this thread hangs on for a few days---pretty sure there will be an answer.

I read somewhere, Weight trimming can really delay 4th Gear shift/change. Think it was on TurboBuick site.