Transmission works cold but not hot - F150online Forums

Go Back  F150online Forums > Powertrain & Mechanical > Transmissions
Transmission works cold but not hot > Transmission works cold but not hot

Transmission works cold but not hot


Old 03-26-2010, 12:28 AM
Junior Member
Thread Starter
Join Date: Mar 2010
Posts: 2
Transmission works cold but not hot

I have a 2000 F-150 XLT 5.4 2wd, Transmission has no problems when cold, but once i drive for a while and it warms up, reverse stops working and it slips when shifting gears. Once warmed up and shifted into reverse, it takes up to 3000rpm to make it slam into reverse and then it shudders the entire time. It will not down shift when passing slower cars either, only a loud clunk and it stays in the same gear. It hesitates between shifting also. It seems like if something was broken inside it would work at all. Right? a quart of Lucas Trans additive helpled the sitiuation for about a month, then slowly stated again. Whats the deal?
Reply With Quote
Old 03-26-2010, 05:05 AM
glc's Avatar
glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Posts: 35,874
Sounds like it's time for a new tranny. If the OD light is flashing, get the codes read with an advanced scanner (not an autozone special).
Reply With Quote
Old 03-26-2010, 09:42 AM
Darrin Burch's Avatar
Senior Member
Join Date: Nov 2002
Location: Indianapolis, IN
Posts: 1,387
It sounds like you might have a problem with something internal where there is too much clearance and when the fluid gets warm and thin you lose pressure. Not sure about the downshifting issue though.

Reply With Quote
Old 03-27-2010, 01:01 AM
Junior Member
Thread Starter
Join Date: Mar 2010
Posts: 2
No overdrive light flashing. This is the fourth transmission put into this truck and they all seem the break rather quickly. I just bought the truck, kinda screwed i guess. It still pulls hard though, just slips shifting.
Reply With Quote
Old 03-27-2010, 02:56 AM
Senior Member
Join Date: Apr 2008
Location: Northern Alberta
Posts: 1,654
Yup your losing line pressure somewhere in prepared for an overhaul or replacement soon.
Reply With Quote

Related Topics
Thread Starter
Last Post
Introduction Forum
12-04-2015 08:05 AM
11-01-2015 08:38 AM
2004 - 2008 F-150
07-25-2015 10:59 PM
07-11-2015 09:06 AM

Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


All times are GMT -4. The time now is 08:35 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: