BII 5 speed
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BII 5 speed
Hi, I have a '89 Bronco II, 2wd, 2.9 v6, 5 speed. the tranny stopped engaging. what could this be? Looking in the inspection port on the side it seems as if the clutch is engaged. It has no drag what so ever but makes a jingling sound. Moving the shifter seems as normal but it makes no differance with engaging the trans. What could be out of wack? It worked fine with no noticable signs that it was going to give out. It just stopped working. Any help with reasons or checks/tests would be greatly appreciated. Thanks
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It's a mits. tranny. I drained it and removed the bottom cover. all looks fine inside. The two forks move as they are suppose to. seems as if it is between the flywheel and input shaft. could the center of the friction plate have spun? could explain the jingling Or could the input shaft have spun, don't see how it could be the input shaft but??? the hydraulic throwout bearing works as should. The input shaft does not spin when the clutch is released. moving the gears by hand moves the drive shaft so I believe the tranny itself is fine.
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Just for the record, I droped the tranny and found it to be the center of the disc had spun and exploded. Torn completely loose from the actual disc. Nothing else was damaged as the disc itself remained between the pressure plate and the flywheel suspended by fibers stuck in the tangs of the pressure plate assembly. Thanks
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
Wow, that is unusual, never seen something like that in a 2.9L. Though you could upgrade to the 4.0L clutch set up, flywheel, and starter, I would just put a normal clutch setup with a new slave.
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I replaced the friction disc and it goes into all gears fine, no slipping or chatter. Problem now is I think the input shaft bearing may have been damaged when the disc failed. It makes a horrible sound in 1st,2nd,and third gears, not so much in 4th or 5th(OD), when under load and sometimes when the clutch is disingaged. I noticed some play in the shaft when changing the clutch but perhaps it is too much. Should have replaced it...stupid me! Could a bad bearing produce this horrible noise without effecting the performance???? Also I was wondering ...since the tranny uses Automatic Trans fluid would AT Seafoam additive do anything for the trans itself, Good or bad?
This may have something to do with the problem. The previous owner (just got the truck)filled it with ATF and drove it about 500 miles before the clutch blew, but after a little investgating I have found that it should be filled with 80-90 weight gear oil. WTF? what kind of damage could this have caused? and could it be the root of my problems with the noise???
I'll replace the ATF with the proper gear oil, hope it helps. could the ATF have caused damage to ALL the bearings??
This may have something to do with the problem. The previous owner (just got the truck)filled it with ATF and drove it about 500 miles before the clutch blew, but after a little investgating I have found that it should be filled with 80-90 weight gear oil. WTF? what kind of damage could this have caused? and could it be the root of my problems with the noise???
I'll replace the ATF with the proper gear oil, hope it helps. could the ATF have caused damage to ALL the bearings??
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
> could the ATF have caused damage to ALL the bearings??
No, they are sealed. As for the sync I doubt that too. Input shaft should have some back and forth play, but, if it wobbles then you have a problem.
> It makes a horrible sound in 1st,2nd,and third gears,
That sounds more like it is not engaged all the way.
> could it be the root of my problems with the noise???
I doubt it, it probably would not make much of a difference if you used atf or gear oil.
Though on the Mit 5 speeds, it does get much quieter and it engages better using a full syn. ATF. That being said, I usually fill them with a full syn GEAR oil and have had no problems. It is what I have been using in my fm146/1988 B2.
I am pulling a Fm146 within the week for a motor job, I can let you know about the shaft play and bearing.
No, they are sealed. As for the sync I doubt that too. Input shaft should have some back and forth play, but, if it wobbles then you have a problem.
> It makes a horrible sound in 1st,2nd,and third gears,
That sounds more like it is not engaged all the way.
> could it be the root of my problems with the noise???
I doubt it, it probably would not make much of a difference if you used atf or gear oil.
Though on the Mit 5 speeds, it does get much quieter and it engages better using a full syn. ATF. That being said, I usually fill them with a full syn GEAR oil and have had no problems. It is what I have been using in my fm146/1988 B2.
I am pulling a Fm146 within the week for a motor job, I can let you know about the shaft play and bearing.
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> could the ATF have caused damage to ALL the bearings??
No, they are sealed. As for the sync I doubt that too. Input shaft should have some back and forth play, but, if it wobbles then you have a problem.
> It makes a horrible sound in 1st,2nd,and third gears,
That sounds more like it is not engaged all the way.
> could it be the root of my problems with the noise???
I doubt it, it probably would not make much of a difference if you used atf or gear oil.
Though on the Mit 5 speeds, it does get much quieter and it engages better using a full syn. ATF. That being said, I usually fill them with a full syn GEAR oil and have had no problems. It is what I have been using in my fm146/1988 B2.
I am pulling a Fm146 within the week for a motor job, I can let you know about the shaft play and bearing.
No, they are sealed. As for the sync I doubt that too. Input shaft should have some back and forth play, but, if it wobbles then you have a problem.
> It makes a horrible sound in 1st,2nd,and third gears,
That sounds more like it is not engaged all the way.
> could it be the root of my problems with the noise???
I doubt it, it probably would not make much of a difference if you used atf or gear oil.
Though on the Mit 5 speeds, it does get much quieter and it engages better using a full syn. ATF. That being said, I usually fill them with a full syn GEAR oil and have had no problems. It is what I have been using in my fm146/1988 B2.
I am pulling a Fm146 within the week for a motor job, I can let you know about the shaft play and bearing.
I would appreciate the info when you drop yours. This is the same FM146/1989 B2 (2wd)
If it is the shaft bearing...where might I obtaine one? Is it an OTC part or dealer only?
thanks for the replies. Cheers
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