94 f150 4x4 behind a automatic od with manual shifter 194k miles.Got a loud rattling/ grinding noise coming from the transfer case in park and neutral, seems to go away when you put it in gear. Is this transfer case shot? Anybody know what years/ models will interchange with this? thanks.

 

That doesn't make any sense. In park and neutral, nothing is moving in the transfer case.

Are you sure it isn't an exhaust rattle?

 

I thought it was coming from the transfer case, it didn't sound like an exhaust rattle. another thing, the truck has been grabbing in reverse, and not wanting to back up at all when in 4wd. this just started happening after using the 4wd gently in the snow.

 

sounds like a trans problem, but i don't know much .. but never hurts to tear apart your transfer case.. clean it up a bit and put it back together should take you 3 hrs , whens the last time you changed your fluids and did maintenance ?

jayson

 

I would guess it is something with the transmission, too. I have no idea what, though.

 

I changed the fluids on the transmission and transfer case about 6 months ago. I've not done anything else to it though. I've had the truck for about a year.

 

AAMCO does Free diagnostic s call them up.. sorry cant help ya...

maybe a senior member can.

good luck mate

 

X2...in park and neutral nothing in the t-case is moving...so that sounds like a tranny problem...and the grabbing in reverse would also be a tranny problem...transfer cases usually dont care what gear they are in if there is something wrong with them you will know it

i stay away from auto slushboxes so i cant help you any further man...sorry

 

The transfer case grabbing in reverse could be yet another problem not related to the noise you hear when in park and neutral.

Only thing(s) that should spin in park and neutral, besides the motor, is the torque converter and the input shaft on the trans up to the first gear clutch pack if not up to the reverse gear clutch pack. Not sure which trans you have but you could have a bearing out, probably plastic or needle, or trash in the trans clutch packs that when the clutches are not engaged makes a noticeable noise.

Also, these particular transfer cases have a nasty habit of wearing the range selector fork inserts out, especially when there is little to no fluid in the x-case. When these plastic inserts wear out then the aluminum fork begins to wear. Once this wear occurs, the range selector starts riding on the very edge of the high gear/direct gear to the point that when you put the trans in reverse the input from the trans can push this gear out of engagement into neutral due to the bevel on the gear teeth, but catch in the forward input from the trans, the gear teeth's flat surface. This can also happen if you put the truck in park when it wants to roll forward as the torque applies to the gears in the same direction as reverse from the trans does and can push the gears out, though gravity may allow this range selector to slide far enough forward to engage a flat instead of beveled surface of the gears.

Fixing/repairing the transfer case is far easier than the transmission. So make sure you know which it is first. Replacing the transmission may or may not fix anything. Really for less than 100 dollars in parts you can repair the transfer case easily, I have 180K on the B/W 1356 (typical transfer case for 1/2tons and broncos from late 80's up to '96, some mid-90's 3/4+ may have a different transfer case until the super duties) with a replaced range fork and an added surface area to the oil pump locating arm.

 

thanks for the info, I guess I need to get under it as soon as it dries up a bit and try to pin it down closer.