M

mad-dog

New Member
hi all please can anyone tell me what i'm doing wrong have just fitted a new( well secondhand) auto gearbox with new torque converter to my 3.9 and still it wont drive?? (please dont tell me to fit a manual box) its a known good box and converter and fluid is up as it should be what have i done wrong? when i put the converter in it "dropped" three times into place but i still have no drive can anyone help ???? or have i just missed something stupid?
 
mad-dog said:
hi all please can anyone tell me what i'm doing wrong have just fitted a new( well secondhand) auto gearbox with new torque converter to my 3.9 and still it wont drive?? (please dont tell me to fit a manual box) its a known good box and converter and fluid is up as it should be what have i done wrong? when i put the converter in it "dropped" three times into place but i still have no drive can anyone help ???? or have i just missed something stupid?
Click to expand...

I take it you fitted torque converter to gearbox first then offered assembly up to vehicle. If you fitted converter to flex plate then fitted gearbox you may have damaged the pump.
 
yes props on and bolted up converter went onto gearbox and fitted in as it should have done (three drops onto shaft)
 
pretty sure you should put the torq con in the box then put the box to the engine!!!

are you using a known good transfer box?
 
Stabbing in the dark here from the details; but you say the flid levels are OK, but unless the Torque converter is full of oil, it wont transmit drive.
Dont know what the specifics in the book say, but is there some procedure to 'prime' the TC you have missed, perhaps?
 
Check the wiring to the Transfer box shift motor as it's all been disturbed, could well be the transfer box is in neutral.
 
mad-dog said:
hi all please can anyone tell me what i'm doing wrong have just fitted a new( well secondhand) auto gearbox with new torque converter to my 3.9 and still it wont drive??
Click to expand...

Hate to appear rude, but did you see the donor vehicle actaully drive with this box in it?

Easy check for pump damage is to remove the pipe that feeds the ATF cooler and see if any ATF is being pumped out of there..........use a bucket in case as there is no mistaking it when it is working :)
 
mad-dog said:
yes props on and bolted up converter went onto gearbox and fitted in as it should have done (three drops onto shaft)
Click to expand...

You say fluid level is ok, but if you have just filled to high on dip stick with engine not running there will not be enough fluid in the box. With engine off fluid should come well above full mark. Then as you run engine torque converter fills and the excess oil disappears. When you run engine does oil disappear from dip stick? If it does add oil until there is some at least evident on stick with engine running. Then follow top up instructions as per manufacturer. These units from memory take about 19 pints of fluid. Well over two gallons from empty.
 
i had this problem on mine in jan. it turned out to be a broken oil pump in the gearbox maybe try testing that. hope this helps
 
put it in drive and look underneath to see if the propshafts are turning if they are the problem is either a broken halfshaft or diff. if not then problem is gearbox or transfer box
 
You must log in or register to reply here.

Similar threads

N
Discovery auto gerabox issues
Replies
19
Views
1K
marjon
marjon
P
FL2 SD4 Auto Gearbox Swap
Replies
2
Views
357
Hippo
Hippo
P
P38 2.5 None start
Replies
5
Views
846
Mark Piercy
Mark Piercy
E
Auto gearbox woes
Replies
3
Views
737
sierrafery
sierrafery
S
FL2 2008 TD2,2 automatic shaking and less power
Replies
13
Views
2K
Madmustang
Madmustang