VB specs

[77 cruiser]

Does anyone have specs for a CQ vb, spool valve sizes springs etc.?
I picked up a couple of vb's one being a CQ & I'm trying to determine if it's been messed with.
So far I've only pulled out a few valves & it seems like the accum. valve & line bias spring are too soft compared to others, but maybe that's what they were.

 

[KEhrhardt]

Does anyone have specs for a CQ vb, spool valve sizes springs etc.?

I have an Excel spread sheet comparing two valve bodies, a CQ and an unknown lo perf VB that I got off eBay. I took measurements of the valves, noted any markings on the valve bushings, measured the springs and such. Unfortunately, I don't know if the CQ valve body was stock, it might have already had a shift kit in it. So the lengths and colors of the springs might not be correct. However I dont believe the valves were messed with and they were measured. I will attach the zipped file, perhaps it might help out.

 

[77 cruiser]

Thank you very much!! That'll help, I already see one diff. without leaving my chair, mine is stamped CQ6 in yellow.

 

[chris718]

jim there are 6 different cqs that i have seen already.look for a tight wound 2/3 shift spring,usually blue,a whie 1/2 shift spring and a white 3/4 1/2 is the tallest,2/3 is a little shorter and 3/4 is the shortest and fattest.if you think this will explain why itll backshift when it does and how far.the line bias is usually yellow and the acc blu.the tv limit comes three different ways although the all produce a feed pressure of 90 psi to the tv plunger.

 

[77 cruiser]

Thanks Chris. Convertor's back in just haven't tried it yet, been working on rear suspension.

 

[77 cruiser]

The VB checks out pretty much the same specs as your's KEhrhardt, thanks.

I'll have to go through the others I have & jot down the specs.

 

[A. G. Olphart]

That would be interesting information to have on hand... a person might not find a direct application for the resulting chart/table, but it should help explain the variations in transmision behavior.

Damn... do I have a talent for stating the obvious, or what? :redface:

 

[Hacksaw]

This is supposed to be a BRF vb:
http://www.gnttype.org/techarea/transmission/valvebody.html

I'd love to leasurely double check this page with another known BRF vb, and post all the valve widths. The seperator plate hole sizes, trans oil pressure, band apply piston size, vb & accumulator pistons spring tensions, AND the valve widths affect when & how the trans shifts. This does not even include the ECM signal for lock up, either.

Example: The 1-2 accumulator affects the 1-2 shift, but is not the only factor. Sonnax has 3 different accum sleeve & valves, plus 3 different springs. Stock has at least 7 different sleeves & valves, and who knows how many springs. So, even if you use the same seperator plate & PR valve spring, the shift timing & feel will change if you use a different valve body.

http://www.transmissionspecialty.com/parts/parts/77777.htm

On the 1-2 accum valve, a narrow valve & the stiffest spring will give you the firmest shift this portion of the vb will allow. But, there's the line pressure, 1-2 accum piston spring, and band servo apply side as well.

The trick is getting a low overlap shift that's not too soft, but doesn't break parts, under a variety of conditions.

-Mike H.