I HAVE AN 89 TA WITH A 434 SBC,CARBED MOTOR,THE REAR HAS MOSER 28 SPLINE AXLES AND EATON POSI UNIT AND RICHMOND 4.10 GEARS,T-56 TRANS.THE CAR LAST WEEK AT THE DRAG STRIP RAN 7.2 AT 99 MPH IN THE 1/8 MILE,THAT WAS WITH A 1.90 60FT WITH NITTO DRAGS.I WAS SPINNING THE TIRES HALF WAY DOWN THE STRIP.I WANT TO RUN SLICKS TO SEE WHAT THE CAR CAN RUN WITHOUT KILLING MYSELF DO YOU THINK THIS REAR WILL HOLD UP

 

only one way to tell, run it. at least you have good axles. i've seen stock cars break these rears, and i've seen cars run 11's on stock 10 bolts for a long time...

 

Manuals will blow it up a lot faster than a auto. Its the tourque and sudden traction that kills these, I think horsepower is a minor issue.

 

lmao

 

4.10 gears are weaker then 3.73's by far. get a moser

 

4.10 gears weaker.i dont think you have a clue what your talking about

 

well then let a few other people chime in and we will see whos the one with no clue

 

come on guys,, help me out here,this guy says 4.10 gears are weaker than 3.73s

 

I can't say im 100% sure about this, but i don't see any reason why a 4.10 would be weaker than a 3.73... especially richmond 4.10's

 

I cant see 3.73's being stronger than 4.10's

 

4.10s are weaker its the way they bolt up to the carrier i think they are too far away from the mounting bolts or something like that? ive read about this before

 

ive been told the same thing before by a local speed shop as well thats why i went with 3.73s

 

i dunno what yall are putting in your morning coffee, but the numerically higher gear ratios will put less stress then the gearset lower...for example, lower gears 2.77 3.23's require more torque to get them spinning so they will absorb more stress....while the 4.10s require a whole lot less torque to get them spinning so they take in less stress

same car, same tranny, same rear, tires, motor everything the same except for the gears, the guy with the lower numerically lower gears will break before the guy with 4.10's

 

well said f crazy,if you dont no what your talking about please dont post

 

its not because of the ratio, read my post again, it has something to do with the way the ring gear mounts to the carrier.. someone will chime in soon and give you exact details

 

hester z28,you said get a moser??????????i got moser axles

 

ok guys read my post i have an eaton posi,the posi unit is made for 4.10 gears

 

uh, posi units arent made for anything except the designated carrier they go in

there are two kinds of carriers, 2 and 3 series, one is for gears 3.08 and lower and the other is for higher

I believe the 2 series 4.10 gears are the weakest from what I have heard

but, im surprised you didnt know that a posi unit doesnt bolt to the ring gear since you sound like you know so much

 

Usually the steeper the rear gear the weaker it is. A 4.10 will not be as strong as 3.73 in most cases. To get the higher rear gear the teeth on the ring gear and pinion have to be smaller because there are more teeth. The smaller teeth cannot take as much torque as the larger teeth of a lower gear set.

Also the 10 bolts weakness is that the case deflects with torque and the 4.10 gears will put more torque on the housing then 3.73 gears causing the case to deflect and break.

 

i never said the ring gear bolted to the posi unit. you just twisted what i said around,,,yeah you would think that if anything, people that go 3,73 and higher are going to race the car, and that they are going to make them weaker for the people that race,im 35 years old man and been going this for a long time.and i think there is nothing thats says 4.10 gears are weaker,all i want is input,if the 10 bolt would hold up to slickes with this setup.now with that said i dont givea f**k about it,what ever. 4.10 gears are not weaker than 3.73.....now the 7.5 ring gear yeah thats a weak ring gear,but the 4.10 gears will last as long or not longer than the 3.73s

 

come on man,,,,,this is diffrent from spines on an axle,the ring gear isnt spinning as fast, wtf