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I am helping a friend with his 8 3/4. He has lost a cap from the center section. How likely will another diner cap work on his case? What I have heard is it is better to start with a new case. I know there are aftermarket caps available so it can be done. Cost of new caps may steer him to...

I am replacing the yoke on my 489 case 8 3/4 center section. I will change the seal at the same time. Once I remove the yoke nut and remove the yoke, given I need to re-torque the pinion nut after the swap, am I going to have an issue with the crush sleeve that is currently installed if it is...

I am in the process of narrowing a C Body 8 3/4. I have a few choices in housing ends the shop is offering me. For those of you that have modified your differential housings with new ends or purchased a new differential, have you used the Mopar ends with green axle bearings or have you chosen...

I did not find a search result on this so here is the question. How strong are the stock A Body 8 3/4 axles when equipped with longer studs? This is for a street car small block 4 speed stroker application and will not be using slicks or sticky rear tires. Just trying to prioritize where the...

Any disadvantage of using a 985 case like more weight, strength, ...? I have heard these are older models of the 742 case. I have not seen many of these. Thanks

I have a bare 8 3/4 housing that needs the studs for the axles as well as the studs to hold the pumpkin. What are the specifications of the studs I need and where can I purchase them? Do these just press in or should I apply any product to the ends to avoid leaks for the pumpkin studs? Thanks

I have access to both a Richmond Powertrax and Detroit Locker differential assembly for my 8 3/4 small block powered stroker. For solid street/strip performance which system can handle the most abuse? I have not seen any information on either the Powertrax or the Detroit Locker on how much...

A couple questions before I tear into the 8 3/4 myself. The factory service manual suggests measuring side pay and runout before taking the center section apart. For those of you in the know is this necessary? Any special tools needed to take the center section apart? I have the basic...

Just wondering if you would recommend using conventional oil to break in a rebuild differential center section before switching to synthetic. I will most likely use the old gears and just new bearings in the center and axles. I was planning on using the synthetic right away given these are not...

When rebuilding your 8 3/4 center sections has anyone bothered to change the clutch packs in their clutch style posi units? I am rebuilding my 8 3/4 so now would be the time to do it. I did not get a chance to drive my project before starting my restoration so I cannot give any feedback on...

Anyone have a trick on how to remove the inner axle seals in the axle tube of an 8 3/4 without a special tool? Thanks

Which axle bearings are people running? I have heard that some people are having issues with the green bearings. I will be rebuilding my stock 8 3/4 axles. Any experience out there? I need to order new bearings and want to select the ones that will give me the least problems. Any advice...

I took my 8 3/4 rear apart and noticed the bearings were shot and the metal retaining ring holding the bearing in place was worn and also scratched the housing tube as well. Does the axle bearing and metal retaining ring ride on replacable inserts? If yes how are they removed? If not can the...

Can a posi unit for an 8 3/4 interchange between any of the center section types 741, 742, or 489? Thanks