Lost Reverse. ...need help.

M

mikeindustries

Member
So in reverse the Scout will move at a idle but there is nothin there if I gas it. Its a 727. First question is will I start losing forward gears also soon? Its drives fine now in forward gears. Second question, is the bolt pattern on the bell housing a typical 727 small block pattern? Thinking about just swapping in another just dont know if this 727 is IH particular.
 
Hi Mike. The IH 727 case is IH specific and the output shaft and t-case adapter housing are sii 4x4 specific. That's a lot of specifics. If reverse is starting to go, it probably won't be long before you lose 1st. But I would definitely check your fluid level, as being too low can create shifting irregularities. To do this the right way, get the rig fully warmed up. Be parked on a level surface. Slowly move the shifter through each gear position, then come back up to n. Set the brake and pull the stick while the engine is hot idling in neutral. Park gives a false reading on the stick. If you are below the safe range, it will take pints not quarts to get topped off. Use dex/merc atf and check the level often because you don't want it over the safe Mark either. Post back after you've tried that.
 
As scoutboy mentioned, the trans is IH specific. I would also check the fluid first. My experience from when the shifting in any direction starts acting up slightly, it's been low on fluid. Onced toped off as described, everything was back to normal.

In my 72, it's the complete oposite, absolutely no forwards gears, but reverse is all good and can back up for days. I am gearing up to pull mine out and rebuild it myself. That is if/when I can actually start working on my own rig soon.
 
scooter said:
as scoutboy mentioned, the trans is IH specific. I would also check the fluid first. My experience from when the shifting in any direction starts acting up slightly, it's been low on fluid. Onced toped off as described, everything was back to normal.

In my 72, it's the complete oposite, absolutely no forwards gears, but reverse is all good and can back up for days. I am gearing up to pull mine out and rebuild it myself. That is if/when I can actually start working on my own rig soon.
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I had one do that just before a long trip. I backed up a hill since I was close to the highway ramp and got rolling fast enough to skip first and I was rolling till nearly home. Someone cut me off or I would've made it the whole way.
 
Fluid is good. Im going to try to find the time to crawl under it this weekend. Going to pull the pan and see if maybe the reverse band can be adjusted. I ordered a tf727 book so I can get my head in it a bit. I have built a few motors and I am pretty mechanically inclined so if push come to shove I will rebuild it. My father in law will be here in a few weeks and mopar runs in his blood. He has rebuilt a couple 727s including the one in my wifes 68 new yorker.
 
That's the next step. Make note of fluid color and smell. Also make note the amount of accumulated matter in the pan. A small amount of sloughed off friction material is to be expected. Count how many full turns the rear band adjustment screw is out from being snug. More than 4 turns out is pretty sloppy. Examine the rear servo and band apply linkage for any obvious issues. Going beyond that involves removing the valve body to expose the fluid ports for access with a compressed air nozzle to verify that both bands and clutches are applying and releasing properly.
 
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