Previous Thread
Next Thread
Print Thread
automatic D150 Governor swap #2998728
12/26/21 10:44 PM
12/26/21 10:44 PM
Joined: Nov 2018
Posts: 22
NC
P
psg Offline OP
member
psg  Offline OP
member
P

Joined: Nov 2018
Posts: 22
NC
Has any changed (elevated) the shift points by changing the governor? I don't understand the rpm listings on the available governors and what it means for my stock transmission tied to a new and very improved 360cid. I understand it can be accomplished with the trans in the car. tnx. psg


Faith in every footstep, faith in every mile
Re: automatic D150 Governor swap [Re: psg] #3003437
01/09/22 01:18 PM
01/09/22 01:18 PM
Joined: Feb 2020
Posts: 22
BRIDGEWATER
T
Tr jimi Offline
member
Tr jimi  Offline
member
T

Joined: Feb 2020
Posts: 22
BRIDGEWATER
[i][/i]Geez PSG, I'll give it a shot not a AT trans expert but I have accomplished this task a few times.
I'm assuming its a A 727 behind a 360 cid.

Yes , it can be changed in the car . Remove the driveshaft / remove speedo gear / remove ( 5 ) 9/16" bolts slide tailshaft off of output shaft it might be difficult to get the parking pawl separated from park rod you can move the output shaft back and forth which will help.

Set the govenor housing at 9 and 3 o clock do not remove aluminum governor housing just the two snap rings on the larger diameter valve (this is the governor and the only part that is changed.
A&A sells them out right !!!,, they also sell springs that go in the valve body that will balance the two shifts so they are at the same RPM .

Installing the govenor is the opposite just make sure it slides easily back and forth in its housing . for some reason i never seem to rip the tailshaft gasket and re-use it hardest part is getting the parking rod back in position in the tail housing , patients here and not too much force rock the output shaft to get things lined up inside.

Re: automatic D150 Governor swap [Re: psg] #3003579
01/09/22 08:21 PM
01/09/22 08:21 PM
Joined: Jan 2003
Posts: 11,894
Benton, IL.
D
DaveRS23 Offline
Special needs idiot
DaveRS23  Offline
Special needs idiot
D

Joined: Jan 2003
Posts: 11,894
Benton, IL.
What do you not understand about the RPM targets of the governors? There are 7 different ones that go from 5,000 to 6,000+ RPM. The biggest issue with changing governors is that a shift split will usually come along, too. In other words, the 1-2 will happen at a slightly different RPM than the 2-3. The spread will be greater with increased line pressure and also increases with each higher shifting governor. This can be somewhat corrected with A&A's spring kit. BUT! They are not exact and require the valve body to be removed and disassembled to install them. It can take several tries to get as close as possible, but often will never be exact and can even change with fluid temp.

What RPM are you going for?


Master, again and still
Re: automatic D150 Governor swap [Re: DaveRS23] #3003813
01/10/22 01:55 PM
01/10/22 01:55 PM
Joined: Jan 2003
Posts: 25,618
Rio Linda, CA
John_Kunkel Offline
Too Many Posts
John_Kunkel  Offline
Too Many Posts

Joined: Jan 2003
Posts: 25,618
Rio Linda, CA
iagree And the shift points might change with fluid temperature; all of which begs the question.......why not just shift manually?


The INTERNET, the MISinformation superhighway
Re: automatic D150 Governor swap [Re: psg] #3003855
01/10/22 03:59 PM
01/10/22 03:59 PM
Joined: Mar 2011
Posts: 3,056
Michigan
A
A727Tflite Offline
master
A727Tflite  Offline
master
A

Joined: Mar 2011
Posts: 3,056
Michigan
Originally Posted by psg
Has any changed (elevated) the shift points by changing the governor? I don't understand the rpm listings on the available governors and what it means for my stock transmission tied to a new and very improved 360cid. I understand it can be accomplished with the trans in the car. tnx. psg


The listed shift points are only the ones that have been “worked” out using a combination of inner and outer weights, gov. springs, etc.

There are infinite shifts points based on several factors if you want to experiment on your own.

Re: automatic D150 Governor swap [Re: psg] #3003907
01/10/22 08:10 PM
01/10/22 08:10 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
i would try increasing the throttle pressure, Passing gear rod adjustment to the carb first to see if you can get it were you like it wrench scope
That can also change the RPM for each shift also scope up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: automatic D150 Governor swap [Re: Cab_Burge] #3004224
01/11/22 05:25 PM
01/11/22 05:25 PM
Joined: Jan 2003
Posts: 5,984
Anoka County, MN
L
Leigh Offline
master
Leigh  Offline
master
L

Joined: Jan 2003
Posts: 5,984
Anoka County, MN
I installed an A & A set. I think it was the 5200 set. The car had 3.55’s, 9” Dynamic and TA fully automatic valve body. I believe I set the throttle pressure so the lever was just touching at curb idle, but that was 20 years ago. It shifted a hair over 5,000. I don’t recall the shift spread, sorry. The car (1970 hemi Challenger), had really good drive ability.

Re: automatic D150 Governor swap [Re: Leigh] #3004351
01/11/22 10:11 PM
01/11/22 10:11 PM
Joined: Jan 2003
Posts: 15,194
Omaha Ne
T
TJP Offline
I Live Here
TJP  Offline
I Live Here
T

Joined: Jan 2003
Posts: 15,194
Omaha Ne
I have installed a butt load of Trans go TF-2 kits over the years and have always been able to achieve WOT shift points between 5 and 6200 with the throttle linkage adjustment. twocents beer

Re: automatic D150 Governor swap [Re: TJP] #3004374
01/11/22 10:54 PM
01/11/22 10:54 PM
Joined: Jan 2003
Posts: 11,894
Benton, IL.
D
DaveRS23 Offline
Special needs idiot
DaveRS23  Offline
Special needs idiot
D

Joined: Jan 2003
Posts: 11,894
Benton, IL.
Going that route changes the line pressure and will change the part throttle shift point, too. So, when you get the WOT shift where you want it, then you are stuck with whatever part throttle shifts that it ends up with. And they are usually uncomfortably high (and hard) on a street car.

The only way to raise the WOT shift points AND maintain some control over the part throttle shifts is with governor kits. Of course, as mentioned, there is always the manual valve body. That is what I run today in my street Hemi car due to it's 6,800 shift point.

I will throw this in: When I raced KOS with the wedge, it wanted shifted at just over 6,000. I fought the split shifts for a long time, never getting them consistent no matter what I tried. I could get one or the other where it needed to be (most of the time) but not both. The best compromise I could come up with was to get the 1-2 shift where I wanted with the governor and to make the 2-3 shift earlier with the springs. That way I would launch with the selector in 2nd. It launched in low, went to second on time and hold there until I selected third. That way I could concentrate on the launch and the launch only, then have time to deal with manually shifting into high.

With low gears when running the 1/8, lots of things happen really, really fast in that first couple of seconds. Being able to depend on that first shift to automatically happen was a real advantage. At least to this guy.


Master, again and still
Re: automatic D150 Governor swap [Re: DaveRS23] #3004399
01/12/22 12:57 AM
01/12/22 12:57 AM
Joined: Feb 2003
Posts: 10,178
Someplace you aren't
S
SomeCarGuy Offline
I Live Here
SomeCarGuy  Offline
I Live Here
S

Joined: Feb 2003
Posts: 10,178
Someplace you aren't
Messing with the kd wasn’t worth it to me. Herky jerky shifts around town. No bueno.


I want my fair share
Re: automatic D150 Governor swap [Re: SomeCarGuy] #3004724
01/12/22 08:33 PM
01/12/22 08:33 PM
Joined: Jan 2008
Posts: 2,196
ILLINOIS
V
volaredon Offline
top fuel
volaredon  Offline
top fuel
V

Joined: Jan 2008
Posts: 2,196
ILLINOIS
So the governor within a given trans, wouldn't be the same as any other of the same model trans?
I mean a governor from any 904 be the same as any other 904 at least for a few years?

Re: automatic D150 Governor swap [Re: volaredon] #3004733
01/12/22 09:04 PM
01/12/22 09:04 PM
Joined: Mar 2011
Posts: 3,056
Michigan
A
A727Tflite Offline
master
A727Tflite  Offline
master
A

Joined: Mar 2011
Posts: 3,056
Michigan
Originally Posted by volaredon
So the governor within a given trans, wouldn't be the same as any other of the same model trans?
I mean a governor from any 904 be the same as any other 904 at least for a few years?


The governor is usually matched to the engine and vehicle combination.

A full size van with a 318 would likely get a trans with a different governor than a 400.

Not only does the governor allow automatic shifts tailored to the torque curve of the engine it also protects the engine at WOT in Drive.

Re: automatic D150 Governor swap [Re: A727Tflite] #3004804
01/13/22 08:23 AM
01/13/22 08:23 AM
Joined: Jan 2006
Posts: 8,162
USA
3
360view Offline
Moparts resident spammer
360view  Offline
Moparts resident spammer
3

Joined: Jan 2006
Posts: 8,162
USA
46RH was the last “mostly hydraulic” automatic.
Would the above governor variability comments apply to the 46RH ?

Re: automatic D150 Governor swap [Re: 360view] #3004888
01/13/22 01:49 PM
01/13/22 01:49 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,239
north of coder
i believe it would. factory matched to the vehicle, and changing governor weights should alter shift characteristics.
beer







Powered by UBB.threads™ PHP Forum Software 7.7.1