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Model A Differential


Guest Hal Davis (MODEL A HAL)
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Guest Hal Davis (MODEL A HAL)

I'm getting contradicting results on this differntial. Upon the advice of several folks, I gave up trying to set backlash, and opted for contact pattern. When I get a good contact pattern, the backlash is what I consider to be excessive (.020), and more importantly, NOISY! I had one fellow tell me, "If it's noisy on the bench, it'll be noisy on the car." Makes sense to me.<P>We got out there last night and got something I think we can live with. The contact pattern is almost perfect on the coast side (reverse side) of the ring gear. That side has no wear at all. It is just like a brand new gear. The drive side doesn't look as good, but there is some wear on that side of the teeth which I believe is affecting the shape of the pattern. We had a better looking pattern with another set up, but again, the backlash seemed excessive and it was noisy. I kept moving the ring gear in to close up the backlash. The pattern kept getting worse, but it kept getting quieter. I think we have a good set up now. One trip around the block may prove me wrong, but I think it will be OK. Too bad it will be so long before I will know for sure.<P>I believe I'm going to go with what I have now, unless some of you think otherwise. Any comments, let me know.<BR>

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I hope you got your answer. I saw your posts at the <A HREF="http://www.ahooga.com" TARGET=_blank>http://www.ahooga.com</A> site. You may try the following as well:<BR> <A HREF="http://clubs.yahoo.com/clubs/modelafordonline" TARGET=_blank>http://clubs.yahoo.com/clubs/modelafordonline</A> <P>Huey<p>[This message has been edited by coupe1942 (edited 12-31-2000).]

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Hal,<BR>As you know, I have been having the same fun myself on my Buick. I finally took it to a well respected rear end shop (not a proctologist) here in town and I'm glad they did.<BR>They found lots of little things wrong that I probably would have missed. I thought that they were going to just change the bearings and seals and set everything properly. This was after they got the big metal pin out.<BR>They ended up not only doing all that but alos having to rivet the ring gear back to the hub because the backlash wouldn't get right.<BR>So all in all, The money I spent with them is well spent. I wont have to worry about that part of the car when I start to drive it next year.<BR>Good luck with yours.<BR>Bill

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Guest Hal Davis (MODEL A HAL)

Thanks, Bill. I'm just stubborn, I guess. It's together and quiet (at least on the bench). I'm gonna try it like it is. <P>Now here comes the stubborn part. If it's not right when I get it back on the road, I will get a new gear set and start over. How's that for stubborn? If that fails, then I'll go do what I probably should have done from the get-go and pay somebody.<P>Glad to hear you got your's straightened out.

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