Automatic trans shifting

[Tim H]

Originally Posted by novassdude

I have a turbo 400 that has the modulator and weights set up so that it will shift at 5800 just putting it in drive and go. We have the electric kick-down on a switch if you turn the switch on it shifts at 6500 both shifts. Takes some testing to get them right but works great once you have it.

That is more like the set up I was contemplating for consistency in a bracket race car.

[Coleydog]

The 727 trans can be set to shift at any rpm with gov weights too, in fact the factory did this with the Hemi trans over the regular trans. I've heard of company's that sell a range of rpm weights.

[GTX JOHN]

On our Torqueflites...If the trans temp changed the shift points would
seem to change a bit.

[Greg Reimer 7376]

That's an interesting consideration:temperature induced viscosity changes of the fluid and what it would do to a shift point.It's getting easier to manage water temperature for consistencies with the electric fans and water pumps and all, but how can we integrate a means of ATF temperature control for the same reason?

[Alan Roehrich]

One huge problem with using the governor to control shifts is that not all race engines require the same RPM at every shift for both performance and consistency.

[Lou Jeffery]

I worked hard on a Ford C-4 to get the shift points where We wanted them and it worked well. After many passes the converter failed so to save time and get back racing I installed a manual valvebody trans. off the shelf and raced it. I was just as consistent manually shifting as the automatic shifting of the other unit. I now have the auto shift back so I can pay attention to other aspects but consistency was not a big difference. My combo has a pretty big window to shift, some could be more sensitive.

[Steve Stasko]

Originally Posted by Coleydog

The 727 trans can be set to shift at any rpm with gov weights too, in fact the factory did this with the Hemi trans over the regular trans. I've heard of company's that sell a range of rpm weights.

A&A Transmission sells the governor weights for Torqueflites.


I built a 727 a few months ago for my street (and occasional strip) car. I removed the stock weight for a "5600 RPM" weight from A&A. There is a noticeable difference when just holding them in your hand. I noticed though afterwards that the trans shifts really quick now. It doesn't lose any RPM's when shifting, but it will shift into high gear in about 250-300' in normal driving conditions. The car is deadly consistent though (Thanks in part to the fresh Select Converter!)...

[ATI Performance Products]

http://www.hotrod.com/articles/sema-...al-valve-body/

T400 E-shift. Can work off a Holley or AEM Computer or with a Turbo Action shifter. Been testing for a year, and working out bugs.

[Bobby Fazio]

I think if you are going this route then you'd better be racing with the 4L60E transmission that e-shift was used on! Running a TH200 or 350 with e-shift should be illegal. Those transmissions never came with an electronic shift and this whole E-Shift bull**** in stock eliminator has gotten way out of hand. How is this any different from super stock?

Originally Posted by Alan Roehrich

In Stock Eliminator, cars originally equipped with automatic transmissions that were shifted electronically by the computer as delivered from the factory can use "E-shift" systems, even on transmissions that were not original to the car, and did not originally have "E-shift". So a late model EFI car can use "E-shift", but an older carburetor equipped car cannot.

[James Perrone]

Originally Posted by Bobby Fazio

I think if you are going this route then you'd better be racing with the 4L60E transmission that e-shift was used on! Running a TH200 or 350 with e-shift should be illegal. Those transmissions never came with an electronic shift and this whole E-Shift bull**** in stock eliminator has gotten way out of hand. How is this any different from super stock?

I have a200 metric. Auto 1-2. Shifts of governor. Bolt thru pan to adjust shift point In my super stocker I shift it because it's a power glide. Too easy. Ya I cheat