Results for "4R100"

Despite my RV mechanic insisting I need a completely new 4R100 transmission for overheating, shouldn't I install a temperature gauge first to verify what's really going on? I can't seem to find any factory temperature sender on this transmission - am I missing something obvious?

I'm nervous about drilling into the pan or tapping into lines since I don't want to create leaks or cause more problems than I'm trying to solve. Is there a safe, proven way to monitor transmission temperature on a 4R100 without risking damage? I've heard about electronic options too but not sure if they're reliable. …more

Got my third fridge failure this season in my '86 Fleetwood Jamboree with the Ford 460 carbureted engine and I'm done guessing what's wrong. Two main issues:

The fridge isn't working at all. What should I check first for troubleshooting?

Also considering an EFI conversion on the 460 for better fuel economy since gas mileage is brutal. Is this upgrade cost-effective or should I stick with maintaining the carburetor system? …more

Replaced the PCM on my 1999 Holiday Rambler Ford F53 chassis but still getting complete power loss with coil malfunction codes hitting an entire engine bank. That seems weird, right? Like what are the odds ALL the coils on one side would go bad at once?

I finally wrestled the PCM out (what a pain!) and found some discoloration on one side of the circuit board. Been reading online and seeing mixed info - some say it's the ignition system, others pointing to PCM failure. Really hoping it's not the PCM since those aren't cheap, but the whole bank thing has me wondering. Is this actually pointing to the computer being fried rather than ignition problems? …more

Planning to fix my Class A motorhome's transmission myself, but my neighbor says it needs fluid, the dealer insists it's the torque converter, and YouTube swears it's the solenoid pack. On my 4R100 transmission specifically, the transmission has been shifting a little rough lately, especially when accelerating from a stop or when climbing hills. Sometimes it seems to hesitate before shifting into the next gear, and I've noticed the engine RPMs climbing higher than usual before it finally engages.

I've owned this RV for about three years now, and I'll admit I haven't been as diligent about transmission maintenance as I probably should have been. The fluid looked a bit dark the last time I checked it, but I'm not entirely sure what I should be looking for or what the proper procedure is for checking transmission health. I've heard horror stories about transmission rebuilds costing thousands of dollars, so I want to make sure I'm approaching this systematically rather than just hoping the problem goes away.

What's the proper first step when you suspect transmission problems? Should I be taking it straight to a shop, or are there some basic diagnostic steps I can handle myself before spending money on professional diagnosis? I want to make sure I'm not missing something simple that could save me a lot of headache and expense down the road. …more

I noticed it's 2 AM and my Ford motorhome transmission just started making awful grinding noises — need to figure out if it's the 4R70W or E4OD before hitting the road tomorrow. I'm converting a half ton pickup into a motorhome and want 4x4 capability. I keep seeing references to different 4-speed automatic transmissions like the 4R70W, E4OD, and 4R100, but I'm honestly confused about which is which and what the differences are.

I'm trying to figure out which transmission would be most reliable for my needs. Some people mention the 4R70W while others swear by the E4OD or 4R100. Do these vary by year or engine size? And is there a clear winner in terms of dependability, especially for someone who might be doing some towing and converting a pickup?

Any guidance would be really appreciated - I feel like I'm drowning in transmission model numbers and don't want to make the wrong choice! …more

Since this is the third time this season my 4x4 RV's transmission is acting up, I'm done throwing parts at it without proper filter service knowledge. I've got a 4x4 RV with a 4R100 transmission (2003 V10) that's due for service. I'm wondering if there's anything different about servicing the transmission filter on a 4x4 versus a regular 2WD setup?

Also, since I'm getting under there anyway, should I be thinking about servicing other components while I'm at it? Don't want to miss anything important that could bite me later down the road. Thanks for any guidance! …more

Somewhere between my wife's third comment about oil stains under our RV and my denial phase, I realized I need to drop the oil pan on my Ford V10 2-valve engine. I remember when I did the 4R100 transmission pan, that rubber gasket was totally reusable - just cleaned it up and slapped it back on.

Is the engine oil pan gasket the same deal? Can I get away with reusing it or am I gonna need to pick up a new one? And if I do need a replacement, any recommendations on brands or installation tips? Don't want to create a mess under there! …more

Called three different YouTube tutorials claiming to boost my 2000 Ford E450 V10's uphill towing power, but now my motorhome struggles even worse in the mountains. The unit struggles substantially on extended uphill grades, particularly during Rocky Mountain travel where sustained climbs can last 30+ minutes.

I'm evaluating several modification options to address this performance deficiency: rear differential gear ratio changes, SCT programming modules, K&N high-flow air filtration systems, and catalytic converter removal. I need to understand which modifications will provide measurable uphill towing improvements versus those that offer minimal gains.

What is the relative effectiveness of these power modifications for V10 mountain towing applications? I'm looking for a technical assessment of which upgrades deliver the most significant performance improvements for this specific application. …more

Nobody wants to hear that subtle whining noise coming from their RV's 4R100 transmission with a V10 engine, but here I am wondering if a spin-on filter conversion kit installation might help. My mechanical skills are about as reliable as my RV's slideouts in a rainstorm, but I keep hearing these kits make filter changes easier than finding a level campsite.

I'm seeing all these different kit options online and honestly feeling more confused than a GPS in a tunnel. Do these spin-on filters actually mount in the cooler line (which I believe is a full flow system)? I'm specifically looking for a filter under 10 microns that works with my transmission setup. Are these supposed to work alongside the existing internal filter, or am I about to create an expensive science experiment under my rig? Because let's be real - my track record with 'simple' RV modifications usually ends with me calling a professional and pretending I never touched anything. …more