4R100 Valve Body 1996, new and ready to install. Fits the 4R100. Ships fast from the USA.
If a 1996 Ford F-250, F-350, F-450 or E-Series van won't upshift even though the computer is commanding the shift correctly, or has lost reverse while every forward gear still pulls fine, that matches two separate checkball placement faults Transmission Digest has traced to this exact production year rather than general wear. This is a new, not remanufactured, valve body built to the 1996 casting spec, so you're starting with a part that hasn't already run a duty cycle in someone else's truck before it goes to work towing or hauling in yours.
The valve body is the hydraulic brain of the transmission. It routes line pressure through precision bores and spool valves to apply each clutch pack and band, and the bolted-on solenoid block carries the shift and pressure-control solenoids the computer pulses to time every shift. 1996 sits inside Ford's F6/F6 casting generation, which ran 1996 through 1998. Sonnax documents that generation as sharing solenoid block lineage with the 4R100, and Transmission Digest's own TSB record groups 1996-98 production under both the E4OD and 4R100 names - which is why this exact casting shows up listed under either nameplate for this year.
A missing green 1/4 in. checkball at the BS2 location causes the no-upshift complaint above with otherwise normal computer commands, and a misplaced BS1 checkball causes the slipping-or-no-reverse complaint - both are physical assembly faults inside the valve body casting, not solenoid or computer failures, so neither one throws a wiring or sensor code on a scan tool. Our valve body symptoms and testing guide covers the vacuum-test method for confirming general bore wear, and our E4OD vs 4R100 guide walks through why the same casting generation carries both names on 1996-98 trucks.
Built new to the 1996 model-year specification for Ford F-250, F-350, F-450 and E-Series applications. Because 1996 sits at the start of a casting generation that runs through 1998, match the casting marks against the listing photos if your truck was built late in the model year, or send us your year and VIN and we'll confirm before it ships. The full E4OD/4R100 parts collection covers the other year ranges and conditions we stock.
Drop the pan and filter with the valve body swap so debris from the old unit's failure doesn't circulate into the new one, torque the case bolts in sequence to spec rather than corner to corner, and refill with Mercon V ATF. If the truck is also due for a planetary or governor pressure solenoid check at this mileage, a matching planetary assembly or 1995-97 governor pressure solenoid is worth inspecting at the same time since both sit in the same hydraulic circuit this valve body feeds. Clear codes and run the adaptive relearn after installation so the computer re-times clutch fill against the new unit instead of the worn one you removed.
| Fits | 4R100 1996 |
| Part type | Valve Body |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
New - built to the 1996 casting specification, not remanufactured or used, backed by our 1-year warranty.
1996 falls inside Ford's F6/F6 casting generation (1996-98), which Sonnax documents as sharing solenoid block lineage with the 4R100, and Transmission Digest's TSB record for this production run groups it under both names.
That matches a documented missing green checkball at the BS2 location inside the valve body casting - a physical assembly fault, not a solenoid or wiring problem.
Likely yes. A misplaced BS1 checkball is documented on 1996-98 production and causes exactly that: slipping or no reverse while the rest of the valve body still functions normally.
It's built to the 1996 casting spec. 1995 sits in the prior casting window and 1998 shares the same F6/F6 generation but may differ in solenoid block revision - send your VIN if you're not sure which you have.
Mercon V ATF.
