transmission issues/questions - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 12-05-2006, 06:34 PM Rookie

Join Date: Oct 2006
Location: Joliet, IL
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
transmission issues/questions

I've had my truck for about a month now and i am having some problems with the transmission this past week.

First off the truck has 103k on it and the transmission is a factory rebuild from Ford and was done about 8-9k miles and a little less than 1 year ago. I am guessing it had a single disc torque converter put in. For mod's so far the truck has a hypermax 300hp chip and a 5" exhaust.

Since i bought the truck i put in a sonnax kit and an external trans filter kit and flushed and changed the trans fluid.

Since i've only had the truck for a short period of time i dont know if this is normal or if there is something wrong. After putting the sonnax kit in i have noticed a sluggishness to the shifting at times. At first all of the shifts were very firm which i liked, but now them seem to be going in the opposite direction. I have had quite a few hard accelerations trying to get it to shift hard but it doesnt.

I'm guessing its the 2-3 shift, but it almost shifts like it's going into overdrive twice. In this shift the rpm's reach 2500 or so rpms, then it drops down to 1500 or so rpms and you hear that squishy sound and the engine gets sluggish then it builds back up to 2500 rpms again and it shifts into overdrive. The first shifts seems ok, but the latter shifts are starting to concern me. Can anyone think of what the problem might be????

Also, under very hard acceleration when it's approaching 3000 rpm's and it is about to shift into the next gear i hear a pssssstttttttpppppppssssttstttpppssssssstt type of swooshing sound. Is that something with the tranny or is it something from the turbo. It sounds like it coming somewhere from the back of the engine or from the front of the trans.

My understanding is that the trans goes from 1-2, 2-3, 3-OD, and OD to lockup. Correct? My previous truck was a 95 dodge ram diesel auto and it had this similiar shift pattern and each shift was very distinct. And again i dont know if its just that i'm still learning the sounds of the new transmission but it is harder to notice them so far. Maybe i'm over analyzing things but i just want to make sure that something isnt going bad in the tranny that i should get looked at.

Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel 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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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.

Thread Tools
Display Modes

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

All times are GMT -8. The time now is 01:45 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.