Tasdemarde

Hi Have a 2008 F150 XL 4x4 (4.6L) with 291,000 km's. The transmission does not slip. The colour is a slightly darker shade of what it looked like new. I bought the truck at 272,000 2 years ago. Should I change the fluid and filter, ie, drop the pan change the filter and replace the oil (same quantity that was in the pan)? Full power flush, incl. torque converter? Or...if it ain't broke, don't fix it...keep as is, until it croaks?

Thanks

Martian

Moved to 2004-2008.

A pan drop probably wouldn't hurt anything, but if the oil is only "slightly darker," at that mileage, I don't know if I'd do it. If you're worried about it, pull a sample and send it off to Blackstone for an analysis and see what they tell you.

1917-1911M

The only two automatic transmissions I've ever had go bad were the two I changed the fluid on. Carefully draining some fluid might work....but I wouldn't stir stuff up. M1911

technokami

I have changed the fluid in my 06 XL by using the pan drop method. New filters and quality ATF make a big difference in temps, at least in my case. I started when I bought it with 250000 km on it and it has no problems 60000 kms later.

dyeguy1212

iTrader: (1)

I'd drop the pan, change the filter, and replace. Install a drain plug, and drain & replace 6 months later.


That's what I did, very happy I did.

Dirttracker18

I prefer a combination if it has never been changed prior or on a regular basis.

Bring it in for a flush and filter change. It is the only way to ensure no old fluid is left in the system. During a pan drop the convertor does not drain so you mix old and new.

Doing multiple changes such as dyeguy states helps but still no substitute for a flush. Not needed all the time but if regular maintenance is suspect and you plan to keep the truck it is worth it.

If you know it has been changed on a regular basis then a pan drop and filter change will do the trick.

Martian

The reason most people don't do that is because it can be way too much of a wash for an old transmission and can cause major slipping problems.

screamineagle

This^^^. Flushing a transmission with that many miles is risky, better off to drive it til it dies. I wouldn't be afraid to do a pan drop or two though.

Especial86

iTrader: (1)

https://www.f150forum.com/f4/transmi...h-pics-206146/

Always change your transmission fluid. Leaving old blackening fluid in there is just going to cause heat.. The heat causes more wear on those clutch plates and bands that are already providing you with the black hue you see in your fluid.. The friction material causing the black hue to your fluid is not doing you any favors with lubrication, cooling, and flow.... I'd change it gradually over time with a drain plug, and skip the flush..

650NutKase

Are you running ATF+4??