Ring and Pinion pattern thoughts
- Thread starter Tman220
- Start date
New setup. Previous was Yukon gear 3.73's, broke a couple pinion teeth. When I took it apart there was no pinion preload, no carrier preload, the previous guy must have goofed it up.
This setup is motive performance 3.73's, I gave it .005" more pinion shim and increased the preload on the carrier quite a bit. Back lash is sitting inside the recommended .007-.009. This pattern is the result.
I'll have to see if my supply of pinion shims could bring me down a tad, I just wanted some opinions since this is the first gearset I've set up. After what I found on disassembly I decided to buy some tools and do it myself
This setup is motive performance 3.73's, I gave it .005" more pinion shim and increased the preload on the carrier quite a bit. Back lash is sitting inside the recommended .007-.009. This pattern is the result.
I'll have to see if my supply of pinion shims could bring me down a tad, I just wanted some opinions since this is the first gearset I've set up. After what I found on disassembly I decided to buy some tools and do it myself
Not to bad in my opinion, Is this a 7.5"/7.6" diff?
Yes, the infamous glass diff in 3rd and 4th gen f-bodies. I'm asking a lot of it, I put about 430 to the tire right now
After removing .002" from pinion depth this is the result at .007" backlash
Better/more contact area on the drive side....Good job!
I wish someone made a bolt-in 8.5"/8.6" for these.....I ran a S60/Dana 60 in my '01 Camaro, Cammed L92, 455 RWHP for a few months & it would hit the heat shield & exhaust no matter what I did. 12 bolts can hit to.
I wish someone made a bolt-in 8.5"/8.6" for these.....I ran a S60/Dana 60 in my '01 Camaro, Cammed L92, 455 RWHP for a few months & it would hit the heat shield & exhaust no matter what I did. 12 bolts can hit to.
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I don't frequent the track much anymore... The Ford 8.8 conversions are intriguing, but any way you slice it you're going to spend 4g's no matter if it's a 9", 12 bolt, dana 60, or Ford 8.8
Still hard to justify, next time it breaks, its happening though.
I made setup bearings, have a solid pinion sleeve, I have a new nut, red loctite. It's all torn back down now to press on the real bearings
Smart move. Did you use a brake hone on your setup bearings? I’m seeing folks bake the pinion bearing and put the pinion in the freezer. Makes life easier getting the big bearing on.
I started with a brake hone/small cylinder 3 stone hone and it was taking far FAR too long and already burned up a set of stones before the first bearing was done! So I ended up finding an 80 grit flapper wheel for my dremel and it still took a while.
I put my pinion and diff in the freezer last night, baked the bearings this morning. The pinion bearing went right on but it wasn't enough for the carrier bearings, I'll still need to find a press for those but I should be able to get it back together this weekend yet
Never use red loctite on anything threaded that is coming apart again. That is what the Orange is for. Red is considered permanent.
That color (red) should cost $500 for a small tube, I hate that stuff. But then if its not done correctly I suppose the red would be a small bit tighter than blue. Since most no one understands there can not be any sort of oil on the threads to use loctite.
If you’ve ever dealt with a pinion nut backing off (and they do) there’s a lot of damage that occurs. Red Locktite for me thank you.
Red loctite is going on regardless. The evidence of a pinion nut backing off in a past debacle is visible on the carrier in my photos. The pinion gear will contact the differential carrier and destroy stuff.
Each time the rear has been rebuilt by someone else it has failed, once from a pinion nut backing off and most recently I took a part the rear end due to broken teeth on the pinion. There was no preload on the carrier and no preload on the pinion bearings which most likely caused the failure. I bought the tools and setting this thing up on the tight side of spec and will just monitor temps during break in
Each time the rear has been rebuilt by someone else it has failed, once from a pinion nut backing off and most recently I took a part the rear end due to broken teeth on the pinion. There was no preload on the carrier and no preload on the pinion bearings which most likely caused the failure. I bought the tools and setting this thing up on the tight side of spec and will just monitor temps during break in
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Manufactures use high strength thread locker on many fasteners, Pinion nuts & ring gear bolts are 2 of them.
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- Dec 7, 2022
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Should cost $500. ...it's already to expensive. Apply a little heat and red will let go pretty easy. That being said I tend to use blue and the red ends up staying in the tool box most of the time. My little bottle of red threadlocker is probably 20 years old and dried out.
I use roughly 4 bottles of Red Loctite a year along with a bottle of high strength retaining compound.