Ecobuilder

Going to do the tranny fluid/filter change and wondering what the correct filter is for my transmission. Getting conflicting info from Napa, Amazon, RockAuto etc.

Transmission is 4R75E - Door code Q

Are these correct:

• Motorcraft FT-105
• Wix 58955
• ATP 19751 (Napa)

Also, is using the Napa Premium Mercon V suitable? I think it's supplied by Valvoline.

Scraper

Wix 58955 on mine with 4R75E trans.

i also put on a Dorman 265813 pan with a drain plug for easier future fluid changes (from Rock Auto).

650NutKase

I did OEM MC and a Dorman drain pan on mine. Leaving it in for another 100k before changing the filter again. Fluid changes every 30k.

Ecobuilder

Appreciate the info.

Amazon delivered the drain pan with plug and MC filter and ended up grabbing 6 qts of Castrol Transmax Mercon V ATF from Napa.

Have a 1200km/750 mile trip this Easter through the mountains and hoping this will get rid of a slight shudder when cruising at 80kmh/50mph.

dukedkt442

You could try out a bottle of lubeguard red too.

Ecobuilder

I've read about that but will do the filter and fluid first and see what change occurs. Not knowing if it's ever been done before, I'm thinking it's overdue.

dukedkt442

I did 3-4 drain/fills over the course of about 1000 miles, including a filter and pan with drain plug to facilitate. Added the bottle of LG last time...figured a little extra friction modifier is a good thing since it went 140k on original fluid, and also supposedly had some additives to eliminate the TC shutter. If that fails, they make a tube of additive specifically for the TC shutter, but the LG has worked well so far for a few thousand miles.

Ecobuilder

Dropped the pan and of course found the little yellow plug. Fluid still looked pretty red. Quite a bit of friction material on the magnet though.

Cleaned the magnet and installed on new pan. Also wiped the bottom of the valve body with a shop towel as it had a coating of friction material too.

Old filter came out with orange O-ring so didn't have to pry it out. New filter went in smoothly and buttoned up new pan.

Approximately 4 qts was drained but ended up pouring in 5 qts.

The shudder at 80 kmh/50 mph is gone. Did have a slight incident when going through a drive-thru - after idling for quite a few minutes, it kind of banged into gear when I let my foot of the brake and started to move forward. Did this twice and then was fine on the way home.

Thinking that the fluid is still making it's way around valve bodies etc.

Will check the fluid level again this morning and take for another drive.