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Old 04-09-2010, 11:52 AM
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200R4 2-3 apply timing

I having and little issue with my 2-3 apply timing, its very close I have installed a CK separator plate and things are almost perfect. Under hard acceleration it shifts good but cruising and low speed shifts I can feel the band hanging on just a fraction of a second as the direct clutches come on.

I want to re size the band release orifice and just need some input on how much bigger to make the opening and confirm which one I'm going to re size.

do i resize # 5 the 3rd accumilator hole is the band release? The modified plate eliminates the larger 3rd ACC opening and the check ball see link.

http://www.turbobuick.com/forums/tra...tor-plate.html
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Old 04-09-2010, 11:34 PM
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I would say it sounds somewhat odd that you are having a bind-up on the 2-3 with that kit.

Direct clutch clearances? Servo clearance? What servo? I there a spring on the servo to kick it off?

Let me know the above and I can help you from there.
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Old 04-10-2010, 02:44 PM
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It has a CK Plate with a Stock BRF servo, if I leave my sonnax servo in it binds even worse I always use both the return spring and cushion spring (no down shift clunk).
I also modified the factory 3-2 control valve spring and install a pump
slide pivot pin spring to block the valve.
I have a heavier line bias spring in and have blocked the 1-2 accumulator.
1-2 are great shifts quick and not harsh at low RPM they get progressively firmer with throttle.
WOT 2-3 shifts are great its just at low rpm, I know my forward drum has an aluminum piston with half the return springs.

Direct clearances appeared to be a little loose if anything the rebuild was last winters project so my recollection might be clouded new steels and Borg warner clutches.

Its not horrible no one notices it but me but it does annoy me while putting around. Maybe I just need to keep my foot into it...........

Last edited by larrym; 04-10-2010 at 02:51 PM.
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Old 04-10-2010, 02:58 PM
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I was involved in the development of that plate.
One of it's positive aspects was that we seemed to have killed the light throttle bind up when dual feeding the 3rd clutches.

You can drill the orifice hole on the pictures you have provided. I'm not sure what Chris is sending those plates out as right now as far as standard sizes.

When dual feeding the hole needs to be larger than when not dual fed.
I would start at .113", or if larger, drill the hole no more than .005" larger than it already is.
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Old 04-10-2010, 03:30 PM
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Thanks Jake!

I'll let you know how I make out, I'd like to go back to the super servo but I'll see how things work with a slightly larger hole.
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