Tcc and speedo gear questions

[olds455]

I have my new 200 4r behind my 455 and it's working great. The car has 3.73 gears and drives great. I thought I wanted the lockup feature but now I'm changing my mind. On the highway it's great in 4th and locked up but in town the speed isn't high enough and the engine is lugging and bucking. I've read the use of the lockup is needed for heat but can I saftly drive this around in town ineither 3rd or 4th unlocked? I'll probably change to a non lockup this winter.

My next issue is the speedometer. I've ran the math and used the gear calcs. I have the orange 11 tooth governor gear and the 31 driven gear. When I checked it's speed with a gps it reads 50 when the speedo reads 60. Did I put the wrong set of gears in or can something else be wrong? Thanks for the help

 

[chris718]

The trans shouldnt be locking in 3rd.put lever in d3 around town or use a toggle switch to interrupt voltage to trans.

 

[olds455]

The tcc is wired through a toggle switch so it can only be operated in 4th. I'm glad D3 is good for town without damage. Any thoughts on the speedo issue. Thank Chris for the great info and help. The trans shifted pefecly at wot. Joe

 

[olds455]

Thanks to all for the help. The project just made a big leap backwards. I believe it spun a rod bearing but I won't know till I get into it. I'll continue to read up on Turbo Buick for tips, stories and learning. Joe

 

[olds455]

Motor is apart. # 6 spun like crazy.

Hey Chris? The ring that bolts to the torque convertor, can that be changed to one that has the pedestal for an olds flexplate?

Thanks, joe

 

[olds455]

Well, my engine is back and ready for assembly. I hope to have in back in next weekend. As for the trans/speedo issue, what can I do to correct this? I currently have the orange drive gear and the white driven gear. The car has 3.73 gears and 255/60r15 on back. It shows 15mph at 12mph and 60mph at about 50mph. So it's 18-20% fast. These were taken with a gps.

Also, I believe I can lower the wot shift point two wAys. One, and some weight to the gov weight or slightly loosen the tv cable. Are these correct? If I do Im only looking for a couple hundred rpm lower. I figured if I'm pulling the gov anyways I'd do it at that time. Thanks Joe

 

[olds455]

Anyone with some ideas to straighten the speedo readings? Would I be accurate on how to lower the shift point? Thanks