5-Spd Getrag Noise?

[hotram03]

I have a '92 4x4 std. cab, here in the past 2 weeks I've noticed a whine starting at of the transmission, If I take it out of gear coasting to a stop is when you can really hear it, Here in the past few days seems like this whine has gotten just alittle louder, not much, just alittle, any ideas on what it could be, and should I park the truck till I can get it repaired, I have never lugged on it in to high of a gear, I always down shift if I slow down, I've heard that kills these trannys, especially if you turn up the power, I'm over filled by 1 Qt. , 5w-30 Mobile 1 synthetic. Help...

 

[1stgen4evr]

Whining.



Probably begging for attention. You can see quite a bit through the side covers. Also you can check for end play or lack of is what you should find. The shafts run on taper roller bearings and should be preloaded a few thousandths which means no forward and back slack. You can check the magnet in the bottom and you can see the condition of the gears. If you have kept it full, you should find good shinny gears but with a whine you will probably find some (too much) end play and there may be fragments on the magnet.



The FWD setup will hold things in alignment so that you can run the transmission to destruction easier than the two wheel drive model. At least take the side covers off and look. Take a hard plastic drink cup and touch the shift stick as you are in each gear. The cup will amplify the noises and probably make you paranoid. You actually need a 'good' transmission to compare the sounds to.



They can be repaired if you don't run them too long after things get slack. Some very good post on the getrag from Michael and others recently.



Should you park it? your call$$$$$.



James

 

[hotram03]

Thanks James, I changed the transmission over to mobil 1 synthetic right after I got it this past Feb. , and just recently changed it again 3 weeks ago, no metal shavings on the magnet, I will take side covers off and inspect for fore & aft movement, I have a gentleman lined up to rebuild it for 600. 00, I R&R the transmission, also going to install new South Bend Clutch while in there, just have to save some money for all that. Thanks for the info, I will atleast check then make a drive or park-it decision.

 

[1stgen4evr]

PM Michael Miller (for a second opinion) as to the difficulty on the rebuild before you commit to 600 dollars for the 'inside work'. If you have the expertise to do the r/r, you might as well do the bearings. In fact you may not have to do anything but reshim.





Also, I reread the question.



If I take it out of gear coasting to a stop is when you can really hear it, - - -



Makes me wonder if it is the transmission. You could have something developing in the ring and pinion or the transfer case.



James

 

[hotram03]

Well I went thru the rear end back in the summer, all new inner and outer bearings along with their races, checked for play in the carrier bearings, there was none, also hung a mag-hytec on it with full synthetic gear oil in it as well, the ring gear looked like it was in good shape, not saying I could have missed something, I dunno? try to cover all my bases, I also put a new front seal on the transfer case, as it had a nasty leak, changed it over to synthetic as well, even liquid tefloned the inspection and drain bolts on the transfer case, what would you suggest doing to narrow down this whine? Like I say its really loud when I kick it out of gear and coast up to a stop.

 

[1stgen4evr]

Well these are the ones that make you pull your hair out. Sounds like you have touched all the bases and still don't have a solid answer.



I had a carrier bearing going south in my 475k mile 93 that didn't have (what I thought) was excessive end play but as it got worse, I worked on the other things and when I got back to it, what I discovered was that the inner bearing hub on the carrier (ring gear side) was eroded and allowing gear to pinion mismatch and there was the noise. New carrier assembly and new gears and no noise. Probably not what you have but as I said, these are the ones that make you pull your hair out.



Drive it on with some caution.



James



Edit: What about the pinion bearings? They are not as tuff as they could be.

 

[redram]

Well these are the ones that make you pull your hair out. Sounds like you have touched all the bases and still don't have a solid answer.



I had a carrier bearing going south in my 475k mile 93 that didn't have (what I thought) was excessive end play but as it got worse, I worked on the other things and when I got back to it, what I discovered was that the inner bearing hub on the carrier (ring gear side) was eroded and allowing gear to pinion mismatch and there was the noise. New carrier assembly and new gears and no noise. Probably not what you have but as I said, these are the ones that make you pull your hair out.



Drive it on with some caution.



James

With the transmission in neutral, the transmission input shaft is turning - so a bad input shaft bearing. Also, you could have a bad throwout bearing as well as a bad pilot shaft bearing / bushing.



Check wheel bearings if this noise vaires with road speed. If it varies with engine speed, you have putting much isolated it to the pilot bushing or throwout bearing.

If with road / vehicle speed, then anythign that varies with road speed (carrier bearing, u-joints, pinion bearing, axle bearings, front wheel bearings, etc) could all be the culprit.



What happens if you put it in neutral, and push the clutch in or out? Does the noise change?

Does the noise change if you apply the parking brake?

Does the noise change if you apply the brakes?



Good luck



Happy holidays.

 

[hotram03]

ok, at Idle no noise, only moving, and atleast 15-20 mph and uit seems like to get to hear it or be able too. , push in clutch no sound change, release clutch no sound change, I have however noticed a small change in the fact that my tired clutch seems to be wanting to shift a little different, as in it has become difficult to slip it enough to get a smooth shift when release the clutch, you cant, has become a little grabby, the clutch is very tired in this truck, the prior owners were good automatic candidates, I've had stick shift vehicles since I was 17, I drag race a stick car, and the throw out bearing hasn't dawned on me so to speak, I was thinking bearing failure. I put my ear to the shifter knob going down the road and it sounds like things are self destructing, yet on inspection, no metal, no shavings, nothing?I will look at the throw out bearing, I let a buddy borrow my truck for half a day and this is what it was doing since it came back. I haven't drained transfer case, I think I will do that as well. . weill let ya'll know what I find, if you think of anything else post I will try.

 

[WJune]

If the Getrag and 205 both have clean metal free lube in them, then you might want to check the sleave that connects the two. Both my 90 4x4's had dry red rust on them. I didn't catch the first one quick enough an it ruined the spline on the 205, plus the sleave. The noise seemed like it was coming from the clutch area. If you suspect clutch probs anyway, might as well bite the bullet an tackle the project. There may be other posts on this problem also.