Make the 700R4 Chirp 2nd and 3rd - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

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Old 07-13-2006, 10:48 PM
BigDawgsEatFirst's Avatar
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Make the 700R4 Chirp 2nd and 3rd

Can someone please tell me or if has already been addressed link me to it.
Check it out
I have a C-10 1986 Truck
I need recommendations(please from those that know and not guessing)
I bought a 2-3 700 Kit from trans -go
stick shift and hold any gear
drilling holes in valve plate remove this ,do that.shim servo pin remove return spring to pin.
replace accum. spring in valve body.
I just want my 2nd and 3rd to chirp the tires when I am in the throttle
I have a vette servo in it(one month)
It will chirp second when I pull out of my job but that is gone once the dirt is off my tires from my job.
What do i need to achieve this
Plate mods
.500 Valve
Firm 1-2 springs
or what???????????????
It rains alot here so when I drive normal
I do not want to spill my coffee type shift.
Can sommeione help me out
I do not know what controls the firm ,quickness
to the shift.
No crash bang
just super firm and quick(chirp style)
Not neck snapping
This kit is awesome

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Old 07-13-2006, 11:25 PM
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You are asking for an easy answer to a difficult question.

1-2 shift is usually pretty firm on the 700, as the large drop between ratios, and the method with which 2nd gear is applied, it is easy to achive a very firm shift.
If the 1-2 shift is not firm enough for you now, you need to install a firmer 1-2 accumulator spring or block the 1-2 accumulator and ensure you have a large enough servo and proper band clearances(the Vette 093 servo will get the shifts plenty hard and the TG kit gets the band clearance in check).
If you block the 1-2 accum you will have hard shifts at part throttle which you do not want.
The good thing about the TransGo kit is it gets progressively harder with throttle.

The 2-3 shift is where it can get tricky. By the design of the trans, the 2-4 band must release and the 3-4 clutch pack must apply to make the 2-3 shift.
The problem is, that the release and application must be timed correctly so that you do not release the band too quickly before the clutches apply, and do not apply the clutches too quickly before the band has begun to release.
If you release the band too quickly, you get a flare, which will feel like slippage, but is a momentary return to 1st gear. When the 3-4 clutches do apply they are effectively shifting the trans from 1st to 3rd gear and it creates alot of heat. Not a good thing becuase the 3-4 clutches are one of the known weak points of the 700.
If the 3-4 clutches apply too quickly, you get a 2-3 bind-up, which is where the transmission is effectively in two gears at once. This is not good because the band and 3-4 clutches are working against each other, placing stresses on the hard parts, costing power, and creating heat and wear on the friction materials.
A bind-up will feel like a very hard shift at heavy throttle.
You can enlarge the 3rd feed orifice in the seperator plate and usually firm the shifts up somewhat. You can play with the band release orifice, make it smaller, play with the servo return spring, etc..

Converter selection has a large effect on shift firmness.
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Old 07-14-2006, 05:23 AM
BigDawgsEatFirst's Avatar
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Thanks for the comeback

As from you writing- and thanks again
Maybe a firm 2-3 would be more realistic for me
I can change converters
I have stock stall now
what can i go to ?
I current have a fresh 350 V-8 (waiting to go in)
cam is .450int .450 exh at 214/214
rear gear is 3.07
tires is 26 inch tall
I am very happy with the transgo 2-3 kit the kit has good stuff in it
I just did not want to go crazy. Street truck only
Maybe later in my Pontiac-


Last edited by BigDawgsEatFirst; 07-14-2006 at 09:40 PM.
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