Dirty 30

iTrader: (96)

whats the purpose of the governer?

lethal93ta

I gave my speedo reluctor and pick up to the trans shop and they put it in when they built it.

8a8mfh

iTrader: (3)

It's basically a valve with weights on it that alters shift points as vehicle speed varies.
Transmissions with manual valve bodies don't need them.

Dirty 30

iTrader: (96)

Can it be removed or something to raise shift points? When i run WOT from 1st to 2nd the tranny shifts by itself but too early, like 4,500 rpm. But from 2nd to 3rd it does let me shift at any RPM.

8a8mfh

iTrader: (3)

Yes, if you have a th400 remove the cover held on by four bolts toward the rear of the trans on the passenger side. You can make the inner weights lighter to raise shift points or buy a governor calibration kit.
Make sure the vacuum modulator is connected to a manifold source, not a ported source.

Dirty 30

iTrader: (96)

What if I pull it out completely? If not, im guessing i can grind some material off to make it lighter? I have the modulator hooked up to the top of my intake (on my truck).

Thanks!
-Jesse

Stuarta

Once you have cover off the governor just pulls out.

There are no timing marks.
It does not matter which way it goes back in.
Other than gear end first.

john kilgore

if you have not connected the electric passing, the trans DOES NOT know you are at full throttle. just put 12v to it through a switch and l think you will be amazed good luck

8a8mfh

iTrader: (3)

From what I've experienced governor problems usually cause both shifts to be too early or too late.

So if you determine it is a governor calibration problem you can cut the nails off and remove the inner weights, grind a little off the sides, and reinstall using finish nails of the same size, crimp the finish nails with vise grips. It will look original, only difference is the factory used hardened nails.

Dirty 30

iTrader: (96)

Thanks!
Im guessing the switch would be a WOT micro switch to the pedal? (i have DBW throttle body)

bjamick

iTrader: (31)

So thats all thats needed to get the speedo to work?? I've got a TH350 but i want ABS but im wanting the speedo to work also ..

Dirty 30

iTrader: (96)

on my 03 truck, the abs and (brake!) lights came on. Now that i swaped the speed sensor and rotor, the lights went away and the speedo works.

lethal93ta

a TH350 and TH400 use diffrent parts, the output shafts are diffrent sizes.

bjamick

iTrader: (31)

Dammit .. So can someone help me out a lil

What will i need to make the TH350 work. W/O spending $250.

lethal93ta

when I was looking to put a TH350 in mine the trans shop was just going to use my factory sender and pick up off my 4l60. then I decided to just go with a trans I know Im not going to blow.

this is the sensor out of a 93 4l60 it should work in the same hole a th350 has. its the same size as the pick up for the Th400 I got, it would fit in the th400 hole but i needed a pick up to work on the bigger th400 output so I went with the reluctor wheel on there. I dont know how the pick up is for the 4l60E but depending on how its made you might be able to use that, when I get my blazer back ill have to look how the speedo is.

8a8mfh

iTrader: (3)

Well if you have a short tail th350, it's as easy as swapping out the chevy tail housing with it's 3/4" speedo hole and getting a BOP (Buick, Oldsmobile, Pontiac) th350 tail housing, these have a 2" speedo hole, same as 700R4's and early 4L60E's.

So if you have a short tail th350, get a BOP tail, reluctor wheel and sender off a 700, 4L60E. And thats it.

bjamick

iTrader: (31)

I have a 9" tailshaft, bc i wanted to use the stock driveshaft .. I know some places sale a whole tailshaft with the modifications already made so the Stock speedo sensor will just plug right in. I think they are like $250 though

HAMRHEAD

iTrader: (8)

Can anyone tell me what the two wires go to? I assume one is to the speedo but is the other one a power, ground, or what? And which wire is what? They are both gray and I can't find any markings. This is for a th400 and am connecting a Autometer speedo.

Thanks.

lethal93ta

yous just put one to ground and the other to the signal wire on the speedo dpnt matter witch eather will work. the sensor just acts like a switch its on and off thats it.

HAMRHEAD

iTrader: (8)

Thanks!