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I have the 8-3/4 sure grip, dana powr-lok style. It has 2 thick & 1 thin clutch plate per side. The rebuild kit only comes with thick clutch plates, and says to re-use the thin plates. My thin plates have the ears broken off them. So, what happens if I use all thick plates in this type of...

were there 2 sizes? I have a 7290 26 spline that is new and it is too big too engage the splines on my 904, which is out of a 73 coronet/318. I think the 727 had 29 splines if I remember correctly. Maybe someone can clear this up.

A friend gave me an old case of atf+3 and I wonder how it will work in my 904 with alto red clutches and kolene steels. I have been using dexron/mercon III in it with great results. Okay to change it to atf+3?

I can't find a torque spec for the pinion yoke nut on a 742 8-3/4. I know it is 5/8-18 thread, so I guessed 150-170 ft lb. Is it more than that? Thanks in advance!

I know I read a post some time back about swapping an 8.8 Explorer rear into an A body and now I can't find it. My buddy and I pulled a good 3.73 trac-lok diff from a 93 exploder this morning with the intention of putting it into his 67 a body. Anybody done this swap?

I see this Dr. Diff from Montana has new repro clutch type suregrip units on ebay. Anyone had any experience with them? They are somewhat reasonable in price, but I don't want to buy junk.

My friend's 99 grand cherokee 4.7/45RFE has recurring "wrong ratio 4th " codes and has gone into a hard shifting, limp home mode. Nothing in the pan, fluid looks clean and does not smell burnt. We are planning to pull it out, any pitfalls I need to know about on these tranny's? this will be my...

This has been covered many times I'm sure, but does anyone know the highest ratio gears I can get for a 741 8-3/4? And will the suregrip carriers interchange with 742 diffs? I just bought one and it is a 3.23 open, would like to put 3.91's maybe with a suregrip on the cheap. I have 4.30's in my...

Any additive needed in the clutch type suregrip? The clutches don't have any friction material on tham like the ford traction lock which requires an additive. I would like to use synthetic 75-140 gear oil in the diff.

Okay, I went down to the junkyard today and pulled a 904 core from a 73 coronet with a 318. What will I need to build it for drag racing behind a 360? Are there 3000+ stall speed converters available? It will be going into my 66 which should weigh about 31-3200# when finished. How much can I...

What marking compound have you been using to check the pattern on an 8-3/4? I am used to the big diffs and seeing a pattern on them is easy. I have tried prussian blue, grease, spray enamel, artist paint and even the compound that comes from the gear people. Still can't see a pattern!

Any other source for 904 1310 or 1330 output slip yokes other than Mancini? They are backordered and I need to build a 7290 driveline for my rearend swap. I already have a 7290 pinion yoke for the rear. Also, should the clutch plates in the sure grip have a friction and a steel? They all seem...

Got an 8-3/4 rear to install in my 66 that has 11x2.5" brakes, 742 case with 2.76 suregrip and is 56-1/2" flange to flange. Whan I have it narrowed, I will tell them to make it 51-1/2 flange to flange. Sound right? I also will just purchase a-body axles for it. Does anyone know how long the...