Thread: Transmission sound in 3rd/ 4th gear

Hi Ossiblue, one question: did you have the noise in all gears? For me it is only in 3rd and 4th gear, bt I suppose if it is the pinion it should be noisy in all gears, shouldn't it? cal

Quote: Originally Posted by Matt Monson Ossi, How secure was the bearing race in the case? When there's that kind of wear we almost always see the case hogged out and either requiring repairs or an oversized bearing. Some shops will peen the case with a punch, which is a stop gap measure at best. Good question. Something my mechanic pointed out, in my case (no pun intended), was that the bearing was still firmly fit into the case and...

Good information. I'm going to start on my transmission in a couple weeks and will use this thread for pictures/opinions as I go through it. Ossi/Cal, if you can post pictures of your worn parts it would be appreciated.

Quote: Originally Posted by sc_rufctr That's not an easy question to answer because it wasn't done to all of the gearboxes from a particular date. From memory the change started sometime in 1986 but I'm not 100% sure. Peter Zimmerman would know for sure. BTW: The part number for this smaller bearing is :930 302 391 00 One thing to remember though is that's a $235 bearing, versus the earlier bearing, which is a $35. We can...

In the meantime, I did some searching here and found this posting by Grady Clay that gives very specific information about the pinion bearing change: http://forums.pelicanparts.com/2464186-post10.html

A clutch alignment problem would also cause it. Many go straight for the bearing as the culprit but often it lies elsewhere.While acceleration have you tried depressing the clutch quickly without changing gear to see how quickly the noise dissapates?

Quote: Originally Posted by amjf088 Hi Peter, Do you know when this change to the smaller bearing occured? That's not an easy question to answer because it wasn't done to all of the gearboxes from a particular date. From memory the change started sometime in 1986 but I'm not 100% sure. Peter Zimmerman would know for sure. BTW: The part number for this smaller bearing is :930 302 391 00

I love it, literally everytime ive got a problem with my car its always on the first page of the technical forum...its wierd, ive got the exact same problem......is this something that need to dealt with asap or what? its a kind of a scraping grumbling noice if i try riding at around fifty or sixty in fifth gear, it happens less in third in fourth, its predominantly loudest fifth

Intermediate plate bearings