7.3L Power Stroke Engine and DrivetrainDiscussion of the 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
When I put my truck into 4low (ESOF, Auto Trans) it seems to slip between idle (800RPM) and about 1500RPM. Once it hits about 1500RPM it feels like it stops slipping and jerks forward. It makes it difficult to do low speed/low RPM driving such as backing my trailer up in 4low. I don't think it was doing this last year and it hasnt been driven much over the winter. I just changed the TC fluid today but these problems were there before and after the fluid change. I don't get the slipping in 4HI or 2WD just 4low. I don't know if it is possible for a transfer case to slip or not like this but that is what it feels like. Does anybody have any ideas?
__________________
2002 4X4 F-350 CC LB Auto True Blue/Arizona Beige 105,000 miles, Triple Isspro Trans/EGT/Boost, AIS intake w/fender sleeve and "doodad" mod, Fumoto drain valve, DP 3-pos, 40tow, 80econ, 120race, BTS Valve body, External bypass trans filter, 6.0 trans cooler, 6.0 IC, 1.0 non waste-gated turbo, ATS housing with stock wheel, Boost relief valve, AIH Delete, EBPV delete pedestal, IC foil delete, 4" SS MBRP turbo back w/muffler delete, Bilstein shocks, 285/75-16 BFG-AT's on stock wheels, and yes... more dollars than sense.
Pulling Jayco 325 BHS Eagle 5th wheel
Yes, it is normal for it to slip until it gets to about 1500 rpm. The transmission is programmed to do that because there isn't enough torque below 1500 rpm. I don't know about the jerk though once it engages. Mine engages smoothly once it engages.
__________________
2001 F350 XLT 4X4, shift on the fly, 38 gal fuel tank, running boards, sliding rear window, black, crew cab, long bed, 4.10, automatic transmission, 11,500 gvwr, 20,000 gcwr, 7500 gvw, dual rear wheels, 7.3l turbo diesel, completely stock, 114,00 miles when purchased, now has 125,000 miles, repairs so far: starter, batteries, cps.
2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
Linear Mode
