4R100 Shift improvment - Diesel Forum - TheDieselStop.com
'99 & up Upgrades and Aftermarket - 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 8 (permalink) Old 01-07-2013, 10:41 PM Thread Starter
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4R100 Shift improvment

My truck has 190k on it and the trans is sloppy as... well you know. After adding a chip it just magnified how sloppy it really is. What accumulator kit(s) can I get to firm everything up. I get a slip-bump on takeoff if I get in it a little and then I feel like I run out of power before it sponges into 2nd. With no chip the trans feels "normal". I want solid, smooth power from stopped to stomped. No pauses along the way. Any advice will help. Thanks, David

My Truck Pictures-2002 F350 Crew Cab Long Bed 4x4 on 37R12.5/17 Swampers. Autometer pyro,trans,boost gauges, 4"exhaust with Dynomax Bullet muffler, on board air and some serious air horns.
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post #2 of 8 (permalink) Old 01-09-2013, 02:13 PM
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The chip probably jacked up the pressures. If its still slipping, then you probably need new clutches as adding more pressure probably wont help.

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post #3 of 8 (permalink) Old 01-09-2013, 03:07 PM
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Yeah, if that's the original stock tranny, then it's probably simply worn out. Very few 4R100 trannies lived past 150k miles.

My Sierra Blanca in the sig pic was a great pickup for 11.5 years. I sold it a coupla years ago. I drove a hand-me-down 2003 F-150 SuperCrew 4.6L 2V for a while, but it was unacceptable for towing more than a rowboat. Replacement is a 2012 F-150 EcoBoost SuperCrew Lariat that tows my 5,000-pound TT like a dream.
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post #4 of 8 (permalink) Old 01-10-2013, 03:45 PM
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IF the trans is in good shape I would do this:

31 row 6.0 trans cooler
Hybrid tq converter..

We have all including new BTS tran's if you deside to get a fresh one.

PM me if I can help.
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post #5 of 8 (permalink) Old 01-14-2013, 07:34 PM
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i have 180k on my 4r100 and its still running strong. stroke of luck?

white 2001 f350 offroad edition, 174,xxx miles, ext cab shortbox, 285/75/16 cooper discoverer S/T's, line-X bed liner, gooseneck hitch, pillar gauges, Edge juice with atitude tuner. all stock temporarily, id like to put a 5 inch turbo back exaust, cold air intake and biuld the transmission on it
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post #6 of 8 (permalink) Old 01-15-2013, 12:30 PM
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Some last longer than others...its a bell curve.
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post #7 of 8 (permalink) Old 01-15-2013, 12:48 PM
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What kind of tuning? The transmissions go much faster with aftermarket tuning.

2001 F350 7.3 4x4 CC SRW/ Aeroforce Interceptor/ BD Thruster II/ Bellowed Up-Pipes/ 4" turbo back straight exhaust / CCV Mod /DIY 6637/ TS chip reburned with PHP tunes/160/stock FFD/PowerSlot rotors and green EBC pads/Recon smoked cab lights/MM Hubs/Hood/HPx/FRx/GPR switch-Indicator

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post #8 of 8 (permalink) Old 01-15-2013, 04:11 PM
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Mild tuning up to about an additional 80 HP won't reduce the longevity of a 4R100 tranny, provided you drive by the gauges and NEVER allow more than 225 tranny temp, and you keep fresh ATF in the tranny. I usually ran a 60-tow tune, but sometimes 80-economy. My stock tranny and torque converter lasted 112,000 miles before the torque converter began showing signs of fatigue. When BTS tore it down, Brian said the torque converter was shot, but the tranny would probably have lasted another 100,000 miles before needing an overhaul.

So an aftermarket tune is not the culprit if they were written by one of the good tuners such as Jody Tipton, Bill Cohron, or Tony Wildman. Tunes over 100 HP, inadequate maintenance, and high temps are the killers of most 4R100 trannies.
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