I have 67 cuda with a crate 360, I've been pretty hard on it over the last 3 years and its got a 7 1/4 in it, I'd like a little more take off and I found a place online that sells other gears for a 7 1/4 jeep new, but I was wondering if I put lower gears in it do I risk blowing out the rear end more. Like I said I have had this car for around 3 years with no problem out of the rear end, I've even took it to the drag strip a few times and get like 89 miles an hour out of it. Just wanting to know if its rear end suicide to put lower gears, I have an 8 1/4 but its a large bolt pattern and then id have mis matched wheels. any help would be great.
7 1/4 Gear questions (crate 360)
- Thread starter aarong5
- Start date
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Mis matched wheels are the LEAST of your concern when you finally destroy that rear and loose a tire and axle combo at high speed. Your considered lucky that didn't get destroyed yet.
8-1/4 at a min. 8-3/4 perfurred. You can get strange, Yukon etc... axles for it as well with redrilled bolt pattern to match the fronts.
8-1/4 at a min. 8-3/4 perfurred. You can get strange, Yukon etc... axles for it as well with redrilled bolt pattern to match the fronts.
74scamp360
Junior Member
get that 7 1/4 out of there ASAP, i'm suprised it has lasted this long, i agree with rumble, 8 1/4 at the least preferably an 8 3/4.
Charrlie_S
Well-Known Member
aarong5
I am a fan of the 7 1/4, but in this case, I agree with the others. Mine has lived well behind several slant six powered cars, but with the torque of a 360, you are on borrowed time. You have the option of several stronger rears. Why not change to a LBP rear , and convert to disc brakes on the front, with LBP?
PS: don't know where you are located, but if you change out the 7 1/4, and it is a sure grip, I might be interested in buying it.
I am a fan of the 7 1/4, but in this case, I agree with the others. Mine has lived well behind several slant six powered cars, but with the torque of a 360, you are on borrowed time. You have the option of several stronger rears. Why not change to a LBP rear , and convert to disc brakes on the front, with LBP?
PS: don't know where you are located, but if you change out the 7 1/4, and it is a sure grip, I might be interested in buying it.
the one thats in the car right now isn't a sure grip but I have another one. both wheels would spin Im not sure if its a sure girp or the gears have been welded I am only 19 but try to soak up as much info as possible, I live in london ky, if you can tell me how to tell if its sure grip I can let you know.
Charrlie_S
Well-Known Member
With both wheels off the ground, turn one wheel, if the other wheel turns the same direction, it is either welded or a sure grip. The best way to tell is to remove the rear cover and look to see if the gears are welded, or if there is a SG unit in there. There are two types of SG units, the "clutch" type, and the "cone" type. The clutch type is much better for the 7 1/4, as it uses 4 spider gears, where the cone type only uses two spider gears.
PS: the 7 1/4 SG units are the same as those used in the other Mopar rears, only smaller.
varlo
Joe- Long Island, Oakdale
trust me I just blew my 7-1/4 up tuesday night. The small rear cannot handle the power of the 360!
stroked 340
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Nevermind a 360 i've seen slant 6's blow them up..lol...
I have a set of stock small bolt pattern axles out of my 8 3/4 you can have if that would help your upgrade.
maybe how much do you want for them and where exactly do you live? I have a old 73 charger with a 8 3/4 sure grip, could I cut it down and put those axles in it? haha I'm kinda dumb on some things. still learning I guess.
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