My brother in law just took his 4:10`s out of his nova and asked me if I want them cheap like $100 but I`m not sure they`ll fit there out of a 69 camaro 10 bolt 8.5" ring gear and pinion gear will they fit in my 85 camaro Z28`s 10 bolt the gears in my car are 3:23 also if they`ll fit will my posi work with those gears?

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R.I.P Dale Earnhardt 3 Nascar isn`t the same without you
1985 Z28 My pride and joy
LG4 305 5spd T-tops 3:23 posi 3" exshust mild street cam Accel wires shorty plugs cap rotor and a H.E.I super coil FINALY GOING ON THE ROAD MAY 24 after a year owning it
5.0L BEWARE
http://Chevy-Camaro-Z28.CZ28.com
Speed limits Whats that???
Kills 1/0

 

69 10 bolts had 8.2 diffs, but it doesn't matter; neither 8.2 or 8.5 will fit your 7.5 diff.

 

Nope, angel's right, won't fit. The 7.5, 8.5, etc. refers to the diameter of the ring gear. Although $100 is a great price for gears, he ought to stick them in the paper, for that price they'd go quick. For about $200 you can order a new set from Summit of whatever ratio you want. If you drive yours on the street, I wouldn't go much, if any higher than 3.73, in fact I have an El Camino that I'm sticking a set of those in here shortly. 4.10s are a little steep, even if you have a pretty bad motor, for the 1/4-mile. I have a friend who has an '82 Camaro with a 450-horse 388 and 4.10 gears, and it practically tops out in the 1/8-mile.

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Horsepower is like cheese, you can add it to ANYTHING and it's a little more enjoyable.

-Posey

 

I thought having the 5th gear over drive they`ed be good oh well

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R.I.P Dale Earnhardt 3 Nascar isn`t the same without you
1985 Z28 My pride and joy
LG4 305 5spd T-tops 3:23 posi 2.5" exshust mild street cam Accel wires shorty plugs cap rotor and a H.E.I super coil
5.0L BEWARE
http://Chevy-Camaro-Z28.CZ28.com
Speed limits Whats that???
Kills 1/0

 

w/a t5 it would be ok. depends if daily driver and need to drive alot of freeway or not. for me, my car goes throught he traps at 6K exactly in 3 gear w/my 3:73's so I can put my 4:10s in cause my eng. will go to 7K no problem. I dont drive thefreeway that much anyways (w/this car). but, if you have stock induction (tpi or tbi) I wouldnt recomend it cause your eng. isnt making power that high in the rpms anyways. so in that case, it wouldslow you down.


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1986 Iroc Z
355, cleaned up trick flow twisted wedge G1 heads, 750 holley, 700r4, 10:1 compr., forged flat tops, solidcam .501I .510E, 4gen rear w/3:73 posi, girdle, and disc's, Edel. torker II, shift kit, 2500 stal, hedmann LT. headers, 4 gen seats, man. strg., lt1 starter, alum. w/p, msd 6al, coil, dist., mallory wires.
12.86 @109mph so far(still need fine tuning)

1995 z28,SS Hood, Iroc style spoiler, tints and black outs, 700r4,2400 act. stall speed,B&M hammer shifter, 17" budnick trilogy III wheels, 275/40 ZR17, 160 stat, man. cooling fan sw., homemaid CAI,1LE elbow, hypertech airfoil, t.b.bypass,!cat, flowmaster, !maf screen, relocated batt., 1LE front l.c.a.s', poly trans and torq.arm bushings, MSD 6AL, custom program, p&p maf, accel coil, and under drive pulley

mods that i have, just not on car yet:
msd wires, edelbrock mid. headers, edelbrock rpm catback