Transfer case help
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Mountain Pass
Joined: Sep 2019
Posts: 109
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Transfer case help
I have a 1986 F-150 with the BW 1345 transfer case. It has started “talking”. Lol. I jacked up the rear end and put it on jack stands to verify the noise was indeed coming from the T-case. While doing so I noticed the front driveshaft is spinning with the truck in 2hi. Is this normal? Like I said the rear tires are off the ground and the truck is in 2wd and the front hubs are not locked so the truck isn’t moving. Is this just another sign the T-case is shot?
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Joined: Nov 2015
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From: Angier, NC
With truck off and rear wheels locked, ebrake on, if you try and turn the front drive shaft will it turn?
If so then maybe the thick oil in the case is making the front shaft turn?
Do you know if that case uses a chain or is it gear driven?
Dave ----
If so then maybe the thick oil in the case is making the front shaft turn?
Do you know if that case uses a chain or is it gear driven?
Dave ----
Lead Driver
Joined: Nov 2013
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Try disconnecting the shift linkage from the lever on the side of the transfer case. Use an adjustable wrench (or similar) to turn the lever and make sure you can feel the detents for all four positions. Then repeat your test of the transfer case. I suspect the shift mechanism is not locking properly in place. Body lift? This can restrict the range of travel for the lever in the cab.
Typically the chain sees very little wear. Unless your truck has been abused or spent significant time working hard in 4WD, the chain should still be fine. But do confirm the shift mechanism locks properly before convincing yourself the innards are ruined.
Typically the chain sees very little wear. Unless your truck has been abused or spent significant time working hard in 4WD, the chain should still be fine. But do confirm the shift mechanism locks properly before convincing yourself the innards are ruined.
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Joined: Jan 2001
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From: Virginia
What usually ruins the transfer cases are running them low on oil. And they do tend to leak at times.
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Mountain Pass
Joined: Sep 2019
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yeah it does leak and dud run low on oil. It is my kids truck and he didn’t bother to tell me so now he gets to pay the price. Lol
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Mountain Pass
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the guy who owned it before me over tightened the drain plug and it has a hairline crack coming from threads. It’s not a big leak.
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From: Virginia
I took the plug out and drained it, then I cleaned it up really good, with a small triangle file and filed a valley in the threads where the crack was and down the side a little bit, mixed up some jb weld and slathered it in the groove I made and put the plug back in. It fixed the leak, but after I did it, I didn't think how they were going to drain the oil if they wanted to. I knew the guy and also knew he would never drain the oil ever again, but I thought next time I will do the same thing and use jb weld, but instead of putting the original drain plug back in, I would install a hex bushing instead and let the jb weld seal around it. Then use a small plug in the center of the hex bushing to be able to take it in and out to change the oil. It's nothing special, just pipe threads.
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