Cruise O Matic Problem - Ford Muscle Forums : Ford Muscle Cars Tech Forum
FordMuscleForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 11-24-2009, 03:06 PM   #1 (permalink)
Subscriber
 
Join Date: Nov 2009
Location: Warsaw, In
Posts: 627
Cruise O Matic Problem

Guys,
I just got my 63 Galaxie Xl and took it out on the road today. The transmission is full of oil but it won't shift from 2nd into third until you get to 65 mph. It will downshift back into 2nd at 50 mph. I haven't owned a COM before but this doesn't seem right. Have any of you guys had this problem and what was wrong if you did. Thanks, Jim
JimNolan is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-24-2009, 03:44 PM   #2 (permalink)
Subscriber
 
Join Date: May 2009
Location: Aptos, California
Posts: 232
Re: Cruise O Matic Problem

I would check a couple things. First check to see that the vacuum line from the intake tee to the modulator valve on the back of the transmission is connected, not split or broken leaking vacuum or sucking trans fluid. If that is okay check the condition of the transmission fluid. If it is not cherry red, but brown with a burnt aroma, service the transmission. Drain all the fluid, including the torque converter, drop the pan and change/clean the filter, and refill with F type fluid. Drive the car for a day or so to see if it starts to shift better. If that doesn't work or it gets better but not consistently shifting to third, try this old timer prescription. Add an ounce or so of brake fluid to the transmission. Just pour it down the filler tube. Then take the car out on the road and run it through the gears easily several times to circulate the brake fluid throughout the tranny. Get it well into the operating temperature range and put a few miles on it. If it doesn't improve let the car sit overnight and try again. I have successfully used this snake oil treatment on old transmissions, particularly those that have sat unused for long periods, to soften hardened seals. If that doesn't do the trick and every thing else checks out, you might invest in a new modulator valve as a last small investment, but your probably up against an overhaul. Hope that helps.
hardfordcore is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 03:54 PM   #3 (permalink)
Premium Member
 
Join Date: Apr 2004
Location: Perth, Western Australia.
Posts: 5,112
Re: Cruise O Matic Problem

First thing I'd be checking is to make sure the adjustment on the vacuum modulator isn't wound in too far.
__________________
2003 Falcon BA XR8 Ute.
1972 Falcon XA GT.
1970 Galaxie 500 Sportsroof.
1963 1/2 Galaxie 500 Fastback.
danv is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 04:26 PM   #4 (permalink)
Subscriber
 
Join Date: Nov 2009
Location: Warsaw, In
Posts: 627
Re: Cruise O Matic Problem

Hardfordcore and Danv,
Thanks for the information. The transmission fluid and filter gets changed tomorrow. The modulator valve I'll order and replace also. ( too cheap not to replace ) I'll try the trick with the brake fluid if nothing else helps. I did notice the first time it went into third I had to do 70 mph, now it's down to 65 mph. ( not much change, but, change all the same). The transmission is clean underneith and was supposed to have been rebuilt prior to the last guy buying it. It then sat for four years while they worked on the interior and exterior of the car.
Danv,
What do you mean about the adjustment on the modulator valve. I disconnected the vacuum hose going to the transmission just to see what would happen. It didn't shift at all then. If you started out in D2 it didn't shift and if you started out in D1 it wouldn't shift. ( If that information helps )
I've built airplanes, airplane motors, car motors and I've got an extensive vocabulary in a lot of subjects other than automatic transmissions. In other words I'm a complete dummy on automatics, but, I have the ability to learn from those who do know. Thanks guys, Jim
JimNolan is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 04:41 PM   #5 (permalink)
Premium Member
 
Join Date: Apr 2004
Location: Perth, Western Australia.
Posts: 5,112
Re: Cruise O Matic Problem

Most modulators have an adjustment.
Disconnect the vacuum hose off the modulator, and place a small screw driver down the hole. You can turm the adjustment either clockwise or counter clockwise, depending on if you want to increase or decrease the upshift point. If I remember correctly, counter clockwise will decrease the upshift point.
But that's assuming that is the problem.
__________________
2003 Falcon BA XR8 Ute.
1972 Falcon XA GT.
1970 Galaxie 500 Sportsroof.
1963 1/2 Galaxie 500 Fastback.
danv is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 04:42 PM   #6 (permalink)
Registered User
 
Join Date: May 2009
Location: Bonney Lake, WA
Posts: 628
Re: Cruise O Matic Problem

Jim, Some modulators are adjustable and some are not. If you have an adjustable one then remove the vacuum hose that is attached to it and use a allen wrench inside the nipple that the hose was attached to. I can't remember what size allen wrench fits in there, but it is something like 1/8" or so. Then you just turn the allen wrench to make your adjustment. Don't forget to reconnect the vacuum hose. Hope this helps you out a little.

I guess that Danv types a little faster then I do. He beat me by a minute. It has been a loooong time since I have adjusted one and I thought that it took an allen wrench. Danv is probably correct though and you can adjust it with a screwdriver.
__________________
1964 Galaxie 500XL, 352cid, Cruise-o-matic, 9in rear, white w/white interior, all original american iron as it came from the factory.
1992 F150, 5.0L, E4OD, 8.8in rear

Last edited by r.n.r.racing; 11-24-2009 at 04:48 PM.
r.n.r.racing is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 04:47 PM   #7 (permalink)
Registered User
 
Join Date: Apr 2007
Location: mocksville nc.-
Posts: 4,066
Re: Cruise O Matic Problem

sounds more like a stickie valve-- seafoam make a auto trans cleaner and condisiner-
__________________
Democracy is two wolves and a lamb discussing what's for dinner. Liberty is a well armed lamb willing to contest the majority decision".
Rich27028 is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 04:52 PM   #8 (permalink)
Subscriber
 
Join Date: May 2009
Location: Aptos, California
Posts: 232
Re: Cruise O Matic Problem

If I remember correctly, we used to crank on the adjustable modulators to get a higher 1-2 shift that would shift harder. Did this to later FMX trannys. The modulator on my 65 cruiso uses a flat blade screw driver, I have seen the allen style also, and then we used to take the modulator valve out and shorten or put in a longer actuator rod to accomplish the same thing.
hardfordcore is offline   Reply With Quote Quick reply to this message
Old 11-24-2009, 05:44 PM   #9 (permalink)
Subscriber
 
Join Date: Nov 2009
Location: Warsaw, In
Posts: 627
Re: Cruise O Matic Problem

You guys are the Greatest. I've got a lot of information from you. Thank you, Jim
JimNolan is offline   Reply With Quote Quick reply to this message
Old 11-25-2009, 08:29 AM   #10 (permalink)
Subscriber
 
Join Date: Nov 2009
Location: Warsaw, In
Posts: 627
Re: Cruise O Matic Problem

Guys,
Just thought I'd update you on the Cruise O Matic, it's fixed. What I found was that the previous owner had sandblasted the throttle actuator assy and while making it look good he caused the passing gear kickdown lever to bind on sand and be depressed at all times. What I was seeing at 65 mph was the transmission coming out of kickdown. I wouldn't have found it if I hadn't been adjusting the modulator valve though. I could turn the screw and change the 1st to 2nd shifting speed but I had no control over the 2nd to 3rd shift point. Realizing if it worked for one gear it had to work for the other too I started looking for other probable causes.
I turned the screw on the modulator valve all the way out and then turned it in until I felt pressure and turned it in (scew driver) then 2 1/2 turns. This gives me a 15 mph shift and a 30 mph shift into 3rd under positive acceleration. I don't know if this is where it suppose to be but the shifts are silky smooth and positive. Passing gear works great and you guessed it, it comes out of passing gear at 65-70 mph. Everything seems to be working, the wheels spin if you get on it in D1 and it seems to get up and go pretty well. Now on to the next items. U-Joints and wheel bearings. Thanks guys, Jim
JimNolan is offline   Reply With Quote Quick reply to this message
Old 11-25-2009, 08:39 AM   #11 (permalink)
Registered User
 
Join Date: May 2005
Location: Phoenix AZ
Posts: 278
Re: Cruise O Matic Problem

Good catch!
__________________
'65 Custom 2 Door Project Car

Remembering to live Coram Deo
65Custom is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
cruise o matic or ford o matic? stickshift Galaxie Pages 1 11-09-2007 09:27 PM
FS: 2v 289/Cruise-o-matic vintagespeed Galaxie Pages 0 10-29-2007 10:38 AM
Cruise-o-matic or C6?How can you tell? MauriSSio Galaxie Pages 7 03-25-2006 07:04 AM
Ford-O-Matic & Cruise-O-Matic Reading Material Galaxie_406 Galaxie Pages 1 10-17-2005 09:36 PM
will a 302 fit a cruise-o-matic? Vincent62 Galaxie Pages 4 02-14-2003 01:53 AM


All times are GMT -7. The time now is 08:09 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.