98 F-150 4R70W Slipping - No 3rd or OD
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98 F-150 4R70W Slipping - No 3rd or OD
Hi guys,
have picked up a 98 F-150 4x4 5.4L with 130K miles. On 'D', 1st gear will get the truck moving if I rev to 2500-3000 rpm. I only drove the truck once a few days ago and had to change the PS pump so it hasn't been out since - so, I'm not 100% sure if it needs 3000 rpm to engage or if it needs a few seconds to build enough pressure to finally engage - either way, something is very wrong. Same thing with 'R' - long to engage, wasn't sure if it would engage or not actually. Also, on highway at about 50 mph, stuck in 2nd gear at 4500 rpm or so. Transmission oil level seemed very high and doesn't smell like popcorn or look black but PO may have swapped it recently. Not sure.
I know that it most probably needs a rebuild but I was hoping that I could find a minor miracle and get some more miles out of it.Any ideas are appreciated and welcome.
Thanks
have picked up a 98 F-150 4x4 5.4L with 130K miles. On 'D', 1st gear will get the truck moving if I rev to 2500-3000 rpm. I only drove the truck once a few days ago and had to change the PS pump so it hasn't been out since - so, I'm not 100% sure if it needs 3000 rpm to engage or if it needs a few seconds to build enough pressure to finally engage - either way, something is very wrong. Same thing with 'R' - long to engage, wasn't sure if it would engage or not actually. Also, on highway at about 50 mph, stuck in 2nd gear at 4500 rpm or so. Transmission oil level seemed very high and doesn't smell like popcorn or look black but PO may have swapped it recently. Not sure.
I know that it most probably needs a rebuild but I was hoping that I could find a minor miracle and get some more miles out of it.Any ideas are appreciated and welcome.
Thanks
FTE Community Team
Joined: Dec 2023
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From: sussex county, nj
fine metal filings , a silver like glow to the oil, metal chunks on the magnet inside the pan, from what you wrote IMMO it could be the pump, or a worn out torque convertor . good luck
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Ok, so after work last night I finished the power steering pump installation and took the truck for a drive. One good thing is the negative battery cable has been unplugged for 6 days, so the ecu codes may have reset.
Much to my surprise Drive and Reverse worked just fine. No slipping, smooth shifts at the right time. Nice driving transmission. But....when I sped up to 30 mph or so, there still was no 3rd gear to be found. Stuck in 2nd gear. Also, after 15 minutes of driving, I got a few rough 1-2 shifts that sounded clunky. I ran out of time and daylight, so that is as far as I got.
Maybe the first time I drove it home it was in limp mode. Performing like it was last night, it doessn't appear to be a transmission that NEEDS to be changed. I hope that I can salvage it. Thanks for any help that you can offer.
Much to my surprise Drive and Reverse worked just fine. No slipping, smooth shifts at the right time. Nice driving transmission. But....when I sped up to 30 mph or so, there still was no 3rd gear to be found. Stuck in 2nd gear. Also, after 15 minutes of driving, I got a few rough 1-2 shifts that sounded clunky. I ran out of time and daylight, so that is as far as I got.
Maybe the first time I drove it home it was in limp mode. Performing like it was last night, it doessn't appear to be a transmission that NEEDS to be changed. I hope that I can salvage it. Thanks for any help that you can offer.
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From my research, I believe that I may have a 2-3 shift valve issue. Coulnd't find one locally, so I ordered one online. Will be here some time next week. Does anyone agree/disagree about my thinking the 2-3 shift valve may be the issue?
Thanks
Thanks
Last edited by Ford-4-Ever; May 4, 2024 at 08:06 AM.
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Cool, how advanced does the scanner need to be for a 98? Are we talking basic OBD2 scanner or do I need Super-duper Ford dealer level scanner? Thanks.
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Do I need one that gives me live data or am I looking for stored codes? Thanks
Frmr Ford Trans Engr
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