M47???????????????
#1
M47???????????????
Just pulled M47; It had a weird noise, a grinding in first and second. Thought it was a throwout bearing but it but it was good. . Backing up here.
I repaired (M47) reverse gear about a month ago. After I repaired it (replaced the small reverse gear), I reinstalled it and it performed great but developed and grinding noise going down the road. Just in first 2 gears; at a certain RPM. The tranny shifts great. I popped the cover off of it tonight but all seems good. Now Im stumped. Pilot bearing good. Carrier bearing good. Really need some help. I have an auto but hate to install it. But might be forced to.
I repaired (M47) reverse gear about a month ago. After I repaired it (replaced the small reverse gear), I reinstalled it and it performed great but developed and grinding noise going down the road. Just in first 2 gears; at a certain RPM. The tranny shifts great. I popped the cover off of it tonight but all seems good. Now Im stumped. Pilot bearing good. Carrier bearing good. Really need some help. I have an auto but hate to install it. But might be forced to.
#3
If it was a gear noise it would only do it in that gear. My first instinct is to see if the 1 and 2 gears are on the same shaft. That would lead me to believe it is on of the bearings on either end of the shaft that supports it in the case. Maybe a shim got left behind when the gear was replaced?
#4
update
no metal in the oil. I pulled the tranny and popped the cover off. Everything looks good. Im gonna replace the carrier bearing. Its seems a little rough but have a had time believing that is it. Im gonna pull tranny apart in couple of days. It has me stumped.
The noise is briefly in 1st gear and pretty frequent in 2nd gear. Sound like a grinding noise. Only does it at a certain rpm. If I let off the gas, it goes away.If I dont find anything in the tranny and it still does it, Ill record the noise and try and post it. Thanks
The noise is briefly in 1st gear and pretty frequent in 2nd gear. Sound like a grinding noise. Only does it at a certain rpm. If I let off the gas, it goes away.If I dont find anything in the tranny and it still does it, Ill record the noise and try and post it. Thanks
#7
still fighting the gremlins
I replace ujoints and carrier bearing. They needed replaced was hoping that would fix it but knew it probably would not. Just drove it, no change. So, which bearing is closest to 2nd gear? It does it worse when I am in 2nd and have a medium load or accelerating going down hill. My only other thought or quesiton is? Could the guibo be installed wrong?I have bolts facing the right way according to the arrows. But, could I have the wrong with the driveshaft/transmission cordination?
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#14
yes, i did have a heck of a time getting it in. So, man up, I probably bent it some how. Learned my lesson to take my time and get the car up high enough to move around. Guess I will go lookin for an input shaft. I installed another m47 that was sold to me cheap but they said it made some noise. I replaced input shaft bearing on it and its doing fine. Thanks for the help.
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