Re: 304/th400 auto doesnt move when in gear? ideas?

first thing you should do is check the trannys fluid level. An auto wont work correctly without the right amount of fluid.

93 xj rustys 3"
79 cj-7
77cj-5

 

Re: 304/th400 auto doesnt move when in gear? ideas?

if you still have the q-trac x-fer case, and you put a 9" in the front, make sure the hubs are locked. it could be that the vacume switch isnt working and its only trying to drive the open front..
are the driveshafts turning?
can you shift the x-fer case with the tranny in gear?? if so thats a sure sign the tranny is TOAST..

~~Elusive~~
1 ton tj-7 thingy R.I.P. (Ressuerection In Progress)
Current State...improving quickly
http://www.jeepgod.net

 

Re: 304/th400 auto doesnt move when in gear? ideas?

i have the D20. the entire drivetrain came from a 1979 J10 pickup. i havent tried to shirt the t-case while in gear. i can try that tonight. the axles are not spinning. i do however run into the clattering sound when the t-case in in neutral an i try to shift into park. nasty sound too!! ill check the tranny fluid as well tonight. thanx

304/th400/ford 9"s front/back 7"lift 15x10/35's
it will run someday

 

Re: 304/th400 auto doesnt move when in gear? ideas?

sounds like your pump is gone.

92 FullSize Blazer Sport 3" 285/75 Geolander MT x8000i Trans4mer 4.10s
65 CJ5 302 Ford 4.5" 34/9.50 TSLs Warn OD 4.27s
79 Scout 6" 33/12.50 TSLs 4.88s Welded Diffs

 

Re: 304/th400 auto doesnt move when in gear? ideas?

a severly plugged trans filter could be the cause, the bad part is the trans is probably toast to put so much material into the pan.

OzarkJeep

 

Re: 304/th400 auto doesnt move when in gear? ideas?

AT's don't often just decide not to work without warning. If the fluid level was low, or the filter clogging there would have been signs of the problem. The transmission would have been slipping. The pump normally does not die without warning, it dies in stages causing slipping shift problems, etc.

If the clutch disks/plates are worn then you'll have slippage before it dies all together.

Water in the transmission can loosen the glue on the friction plates and cause loss of hydraulic pressure... but this too gives waring signs of slippage.

When the AT dies like you describe, going from park through netural to Drive, the this possibly means a one of a couple of things. My suspision is one of the following has occured:

a. The low/reverse band has broken;
b. The low/reverse band adjusting mechanisim has backed out;
c. The low/reverse band has slipped off the adjustment bolt.
d. You've got a massive hydraulic valve plug in the valve body.
Get a manual and take a look at how the band adjustmens are made and at how the bands lay inside the transmission. Then drop the pan and see if everything looks like it does in the manual. This ain't rocket science, it's prue simple hydraulics and mechanics.

 

Re: 304/th400 auto doesnt move when in gear? ideas?

i filled it with atf today and let it circulate for a minute. then it worked!!
here is some background for you: i bought the truck two years ago. and it hasn't been moved under its own power until 2 hours ago. yes, i changed the oil, plugs filter etc.. ive never had an auto before, so i never thought... anyway, around twenty mph an awful clattering grinding noise started coming from the tranny when it made it to second gear. i eased off the gas and the noise faded. i hate automatics..stick is so much easier to figure out. matt

304/th400/ford 9"s front/back 7"lift 15x10/35's
it will run someday

 

Re: 304/th400 auto doesnt move when in gear? ideas?

my th400 did the same exact thing. I wasnt so lucky though. I had to get it rebuilt. That really sucked and it cost a lot too. Glad to hear that it still works ok.

ColeJ6