Positraction Differential 62 Vette

[David J.]

Hi, I need your help! I have purchased Ring & Pinion, new clutch plates, pinion and side gears (spider gears) from Randy's Ring & Pinion. I am using the 1953 - 1962 Corvette Servicing Guide book. I am looking on page 4-20 and looking at the section in the Fig. 39-Five Stack Plate Arrangement.

The section above in the 4-Stack plate arrangement they show the Belleville Plate (dished)positioned so that the concave side faces against the case (outside).

3 questions:
Is this safe to assume the same direction for the 5 stack? The thicker friction disk (with tabs)cave side would face towards the out side away from the center?

The guy at Randy's sugested theat I soak the friction disks in the posi additive before I assemble the friction disks to the stack. Does htis make sence?

What weight gear oil should I use on the final assembly?

[John H.]

Re: Positraction Differential 62 Vette

David -

Can't help you on the plate orientation, but soaking the friction disks in the lube/additive blend before assembly is a good idea so it won't chatter until you drive some figure 8's if it's assembled dry. There are lots of lube choices out there, but I've always used the GM diff lube with the GM additive, never had a chatter or a problem.