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Transmission works cold but not hot

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Old 03-25-2010, 11:28 PM
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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?
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Old 03-26-2010, 04:05 AM
glc glc is offline
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Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 31,301
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).
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
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Old 03-26-2010, 08:42 AM
Darrin Burch's Avatar
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Join Date: Nov 2002
Location: Indianapolis, IN
Vehicle: 2001 Ford F150
Posts: 1,099
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.

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Old 03-27-2010, 12:01 AM
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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.
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Old 03-27-2010, 01:56 AM
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Join Date: Apr 2008
Location: Northern Alberta
Vehicle: 2006 Ford F150
Posts: 1,654
Send a message via MSN to Paralyzer
Yup your losing line pressure somewhere in prepared for an overhaul or replacement soon.
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