This is my first post so forgive me if this an easy one.

I drive an f-350 4x4 with the 7.5 liter and it has the E40D tranny and auto hubs.

Whenever I put the truck in (2wd) reverse and then switch it to drive (or 2nd or 1st) there is a grinding sound (sounds like something trying to engage) and then there is some thumping (thump-thump-thump-THUMP) and then it is smooth (regardless of speed or gear) UNTIL it goes into reverse again.

In my efforts to find the issue I have:
1) Flushed the transmission (Mercon)
2) Replaced the filter (wiped out the pan)
3) Checked the transfer case and added fluid

I'm thinking it is the auto hubs (and will switch to manual).

Any other ideas would be appreciated.

SuperBeast460

 

it does sound like it would be the hubs, ive heard some bad things about auto hubs so i would start there first.

 

It sounds as if one of the auto hubs is partially engaged or tries to engage when you change wheel direction. You should be able to find the problem hub easily enough.

With the transfer case in 2WD, jack a wheel off the ground and turn it by hand in each direction. The hub should not be engaged and the wheel should spin without noise. Try the same with the other side. Usually you can hear and feel a problem hub as it tries to engage when the wheel is turned by hand.

Lou Braun

 

Sounds simple enough, thanks Lou!
Was just pricing auto locking hubs...jez!
Maybe I'll just put in the manuals since they seem to be more reliable AND will save me SERIOUS bank.
Other than WARN, what are some good brands of manual hubs?

SuperBeast460

 

It was the driver side hub.
I replaced both with Warn manuals in about 90 min.

I thought I had the OEM hubs so I got the spindle nut kit as well when I went to NAPA. When I got the hubs off, turns out there was already a spindle nut kit in there...
Noobs gotta learn right?
At least I got the $80 for the kit back!

Hubs are workin' like a charm now, the noise is gone and (with swappin' out the tranny fluid) the SuperBeast is runnin' good.

Thanks for the help!

SuperBeast460

 

my 92 f-150 done the same thing then the driver side hub blew out the manual hubs are working fine not too expensive either so start there and work your way through it till you get it figured out

 

Everyone jumps about the Warns...... they are artwork.
But yours are mighty pricey.....the Mile Makers are great too, and might save you some cash. They work on my truck just great.

 

i got the super winch brand and they are working just fine but whos to say a month down the road

 

i have a set of WARNS and a set of SUPER WINCHES. in comparing the 2 the WARN look very cheap compared to the SUPERWINCHES...My WARNS have cast aluminium inners, the SUPERWINCHES are cast iron.

 

i like the warn better for look. you can aleast keep them polished. i have a set of super winch and i can keep the outer case from moving 1/8" i can losen the bolts and tighen them which will fix it for a month and then they will turn slightly again

 

i forgot to mention , i really like the 1/4 turn of the SuperWinch hubs.