1975 fj40 with sm465 to afco transfer case will move in 2 high and 4 high but when letting out clutch in 4 low wont move please any suggestions before i remove and try to rebuild. New to this thanx.
FJ40 transfer case wont work in 4 low?
- Thread starter 9tailedfox
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Make sure it is actually shifting into low range instead of just neutral. Mine toy is 2H 4H N 4L Check your linkage by you being under it and looking while someone else is shifting from 2H to 4H then to N and finally to 4L
- Thread starter
- #3
Manually moved linkage to low from underneath, drive shaft engaged but when released clutch , nothing will move in 4h an 2h?
- Thread starter
- #4
sorry misspoke, only moved in
H and 4H.
H and 4H.
OK so what is an afco transfer case? Maybe the linkage is allowing the front drive line to engauge but not enough to send power from the engine to the drive lines. Has it ever work correctly?
- Thread starter
- #6
Locked hubs, tried backing up and moving forward thru all transfer gears and still no moving when releasing clutch in 4 low?
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- #7
don't know wasn't running when I got it but drained fluid and didn't see any teath or pieces.
Sounds like you will be investigating the transfer case, maybe something as simple as a shift fork isn't locked to the shaft because the set screw holding a key got loose. What is a afco transfer case?
pb4ugo
SILVER Star
It sounds like the tcase is in neutral.
Living in the Past
SILVER Star
Paul @3_puppies is right. More information is always helpful. Vehicle close to fifty years with non original transmission leaves a whole lot of possibilities. I have a 79 that a previous owner swapped in a 74 transfer and made a hybrid shifter using linkage for the 74 and 79. Stock the 75 FJ40 had two different transfer case shift levers used depending on build date. Early one is more complicated the. Both have a shift gate designed to prevent 2WD in low range. Could be something as simple as out of adjustment causing the problem.
Mark W
Yep, I really don't really care that much I guess.
I have never heard of an Afco tansfercase and google has not either it seems. So my starting assumption is that you have an OEM Toyota Land Cruiser T/C.
The engagement of hi range or neutral or low range is independent of the selection of 2wd or 4wd.
The engagement of high, neutral or low is achieved by a dog clutch (internally splined hub which slides over externally splined shaft) . In this case it is the low and high range gears which are on each side of the hub.
Same hub, same fork, same everything for high and low range. Only difference is if it slides one way to the high range teeth or the other way to the low range teeth. (It sits in between the two for neutral.)
Short of catastrophic failure (which will usually result in gnashing grinding and very obvious indications of major internal damage) I can not, off the top of my head, think of any way that the rig will move in high and not low IF it is actually engaged.
Double and triple check that you are actually shifting into low and not just into neutral. And check again. I'd bet money that are not. You should feel a definite detent from high to neutral, and from neutral to low (and of course back again).
There are not any syncros involved here, and who knows how stiff the linkage might be on an old, possibly neglected and possibly hacked up rig. Push hard. Also try (gently this time) pushing the linkage into low while letting the clutch out a little to have the gears spinning inside in the T/C to facilitate meshing possible gummy/sticky teeth/splines.
Mark...
The engagement of hi range or neutral or low range is independent of the selection of 2wd or 4wd.
The engagement of high, neutral or low is achieved by a dog clutch (internally splined hub which slides over externally splined shaft) . In this case it is the low and high range gears which are on each side of the hub.
Same hub, same fork, same everything for high and low range. Only difference is if it slides one way to the high range teeth or the other way to the low range teeth. (It sits in between the two for neutral.)
Short of catastrophic failure (which will usually result in gnashing grinding and very obvious indications of major internal damage) I can not, off the top of my head, think of any way that the rig will move in high and not low IF it is actually engaged.
Double and triple check that you are actually shifting into low and not just into neutral. And check again. I'd bet money that are not. You should feel a definite detent from high to neutral, and from neutral to low (and of course back again).
There are not any syncros involved here, and who knows how stiff the linkage might be on an old, possibly neglected and possibly hacked up rig. Push hard. Also try (gently this time) pushing the linkage into low while letting the clutch out a little to have the gears spinning inside in the T/C to facilitate meshing possible gummy/sticky teeth/splines.
Mark...
pb4ugo
SILVER Star
AFCO, maybe it's ASCO. Doesn't the tcase have raised letters on a plate or case?
- Thread starter
- #16
Thanx snow day today will try again and try to post pics
+
0k, I did some more research and it has what looks like ASCO on top of transfer case with 4 I 1690 stamped on small pad. Looking at other posts I assume it is 1974 September # 1690 produced. That being said it is hooked to advanced adapter to sm465. I disconnected linkage and moved again manually thru 2h 4h and 4 low. Releasing clutch it only moves in 2h and 4h the strange thing is 4 low front drive shaft appears engaged but no movement when clutch released. If anyone has any further suggestions, I would appreciate it or where would i research rebuild kits? Thank for input so far.
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A rebuild kit for a '74 transfer case? I got mine from @cruiseroutfit
4H-N-4L the front driveshaft will be engaged thru all 3, so even in N it won't spin
does the 4H-N-4L lever feel like it engages in all 3 places?
did you just buy this and found out it doesn't work?
just to be clear
2H-4H is the linkage to the nosecone on the front of the transfer case
4H-N-4L is the rod fulcrum linkage to the top of the transfer case
are you removing the last rod to the top of the case and manually moving the lever on top of the case thru the 3 positions?
does the 4H-N-4L lever feel like it engages in all 3 places?
did you just buy this and found out it doesn't work?
just to be clear
2H-4H is the linkage to the nosecone on the front of the transfer case
4H-N-4L is the rod fulcrum linkage to the top of the transfer case
are you removing the last rod to the top of the case and manually moving the lever on top of the case thru the 3 positions?
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- #19
- Thread starter
- #20
thanx for the posts. The PO had fabricated a rod from the 4 low that wouldn't allow it to go thru 3 positions only 2 and was stuck in what I assume neutral ..stting for 15 plus years. Looks like a discontinued item, will have to have fabricated thanks again for the input.
