T-18 transmission problem

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Mar 10, 2016 | 04:19 PM

ktm4012

Thread Starter

Mountain Pass

Joined: Feb 2016

Posts: 203

Likes: 13

From: Southington CT

T-18 transmission problem

I have a weird problem with the T-18 in my 79 F250 4x4. I have no drive from clutch to back of transfer case. I pulled the cover off the top of the trans and everything looks ok to me. When spinning a rear tire the driveshaft-transfer case-and main shaft all spin with no noise or drag. When looking through the clutch fork window in the bell housing I can see the pressure plate isn't moving but I can't see the input shaft. Could the input shaft be broke? I unhooked the clutch linkage thinking it might have been engaging the clutch but no change. Hate to pull the trans if I don't have to. any ideas? (in the picture the whole shaft spins with the driveshaft but not connected to flywheel)

Mar 10, 2016 | 11:20 PM

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,475

Likes: 2,800

So the engine will run, but when you put it in gear and let out the clutch, the vehicle does not move, right? Any noise associated with doing that?

And with the engine off, with the wheels up, you can turn the rear wheel and the shaft and transmission guts all turn, right? Any noise or resistance?

Have you tried turning it that way with the engine off and trans in gear?

With the top off the trans you should be in neutral to start with.

If it turns freely from both sides with the trans in gear, I don't see any choice but to pull the trans and take a look at the input and clutch disc.

Mar 11, 2016 | 03:09 AM