What is a good diff to put in a 68 Camaro running a 454?

Question

I have a standard diff running 3.7 gears. A little confused on options for a strong diff that is, preferrably, GM.

Answer 1

you need a 400 carrier 12 bolt rear and then look into 3.73 gears this will keep the torque high and also give you a decent highway speed also see that you are running a 2800 to 3500 stall converter, and if you beat it sometimes make sure the converter has balooning plates, and if you want real strength install a ford 9 in

Answer 2

for a big block with any real horse power, you should not use anything less then a 12 bolt gm. you can use a 3.73 to keep it fairly streetable ar go with a 4.10 for alot more bottom end "yank out of the hole" . currie, quick performance and other builders made a housing to fit your car.. a direct bolt in ! they range from 1200 to 4000.00 depending on how fast and how much h/p you're putting thru it. and it you want a spool or a posi...... check into those, they are definitely worth the money. !  

Answer 3

GM 12 Bolt out of the 67-69 model years with a the 396 option . I ran a 10 Bolt Posi unit in my 68 RS with a 396 with 4.10;1 gears then changed the ratio to 3.73:1 but drove it hard for 10 yrs with no troubles. I sold the car a few years ago and my buddy who bought it has had no troubles and he beats up Mustang GTs all the time .  Unless you are going to race it the 10 bolt posi or limited slip diff is fine. and a 12 bolt housing for a 67-69 f-body is hard to find as the 70-81 housing is wider by 1 inch on each side. Year One Inc. (1-800-950-9503) will probably have the complete assembly for you and it will be NEW and fit properly.  

Answer 4

GM 12 volt!! LMAO!!!

Up to you dude, 3.90 or 4.11 would be better for holes shots, and since MPG doesn't seem to be your concern, go for it.

I knew a guy in Germany who had small block tweaked up, but had maybe a 2.56 gear setup for autobahn cruising.  

Answer 5

Gm 12-volt