I have always thought that a shift kit is what is used to change shift firmness and shift points. I believe now it will only change shift firmness. How is shift point changed? On monday the motor should finally be dyno tested. I am thinking that the torque and HP numbers I get will help me decide where the trans should shift for max performance.
I am asumming that a stock trans with stock convertor will shift at the same points no matter what convertor or high HP slant is bolted to it, if the trans has not been touched. Is this a correct asummtion?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

The governor changes both the 1-2 shift and the 2-3 shift.

To fine tune the 1-2 shift you need a different 1-2 valve body spring

and for the 2-3 shift a different 2-3 valve body spring.


Shimming the valve body springs might work too

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

In the end, you are adjusting pressures to set the shift points (timing)and "firmness".
The 3 pressures you are working with are:
-Main line pressure
-Throttle pressure
-Govenor pressure

You will need to drive the combination and decide what "problem(s)" need adjusting and then decide on the best means of adjustment. It is likely that you can increase the mainline and throttle pressures to get decent shift points and firmness.

In my former life, I was a GM guy (shhh, don't tell or flame). I always left the shift points alone and just went for firmness. Then when I knew at what RPM the transmission should shift for max. ET, I took my right hand and moved the shifter to the next gear .

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Chris'
Autobody
Restoration
Service

Humm. I could problem answer many of my question by simple taking the car out and beating for awhile, but won't it try to up shift regardless of shifter position? Isn't doing that just going to let you keep it in a lower gear with less throttle position? Another words, full throttle shift point in D and part throttle shift point in 1 would happen at the same RPM, yes?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

Not really. If you take your car out of the garage and drive two blocks at 1500 RPM in D, it will go into 3rd gear in just a few moments. It may even start off in third gear. Now if you smash the throttle (even in D) and drive the same two blocks you wont even get it into 3rd gear.

I was mainly talking about aftermarket shift kits. All of the ones I have installed and used make the 1st, 2nd, and 3rd shifts manual if you start in 1 or 2. In D, the transmission shifts automaticly.

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Chris'
Autobody
Restoration
Service

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

From that reply I take it either you are not understanding what I am saying or that I am totally missing the point to your question. Sorry, I thought I could help.

But Ed and Doc gave you the info you need on the technical part of what needs to happen to change the shift points.

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Chris'
Autobody
Restoration
Service

You missed what I was asking. Sorry I am short sometimes. The phone rings and I am off and running again. I understand that in Drive the shift points will change based on throttle (kickdown) position. Perhaps an example. Keep in mind the figures give are rough numbers and I didn't have a tach then. Lets say in Drive with WOT the car shifts up from 1st to 2nd at 4000rpm and 2nd to 3rd at 4000rpm. How with the shifter in the 1 position and throttle 1/3. Will the trans still shift at 4000 rpm or maybe higher? Note that the shifter is not in Drive but it is in 1. Same deal with shifter in 2nd poistion. This is a stock 904 trans.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

With a stock 904 trans, the trans will stay in the selected gear for as long as you keep it there. If you select 2nd and floor the gas, (WOT) based on your example the car would start -off in 1st gear and shift from first to 2nd gear at 4000 RPMs and stay in second gear untill you shift it to "D".
DD

don't think you're asking what youre trying to ask. Perhaps a little reading on basic mopar stuff would help you formulate right questions to get right answers. the 904 won't downshift over certain RPM's, but it will hold the gears as doc said. If you're in D or 2nd, 1 - 2nd shift will occur at the same point regulated by throttle position sensor (aka kickdown lever) Basic shifting point is line pressure AND throttle. There's a lot of reading to do and you'll figure out that mild throttle would give you certain range of shifting points in MPH or RPM, mid trhottle another range and full trhottle another. Downshifting is according to the year, some trans won't downshift unless you hit full throttle, some others will.

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

Just for my clearity. If I select 1 gear and hit the gas it will stay there and not upshift until the engine run out of air or scaters.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

A Slap Stick shifter would be great.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

I have to say, after going to hit the t-flite handbook I have lying around, that I'm not 100% sure of the answer. If we were talking about a stock engine I'd say your engine would run out of breath. I don't know (and I'm not in position of making an educated guess here) how thing's gonna be with your super super /6. I blew off one valve body by hammering on the gas with the TPS way too tight. This was my moderate to mild build up slant. don't think I was making more than 200 hp. After I noticed it wasn't shifting, I tryed to manual shift and noticed I was out of 1st gear. It would engage 1st if you where in N and then manually shift into 1, but then for upshifts, you'd have to return the shifter to N and shift again. If you didn't shift manually, the trans would stay in whatever gear you shifted and that'd be it. No downshifting neither. I returned home with no 1st and shifting manually after 400 miles.

So to say that maybe you're right and you'll be fine with a RVB and a manual VB kit. cheetah or transgo... don't know if transgo makes RVB's. Slapstick woudl be good!

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

If you select low, with the shifter, and put the throttle to the floor, the trans will stay in first untill you move the shifter to 2nd, or something breaks. The trans will then stay in second untill you move the shifter to drive. This is provideing the rpm is high enough when you move the shifter. If you move the shifter at a low rpm the trans will not shift to the upper gear untill the programed auto shift points (the same point as if you left the shifter in drive) This is assuming a stock trans and valve body.
With a manual shift valve body the trans will shift into what ever gear is selected at any throttle opening or rpm.
Does this answer your question?

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225