454 small block+tko600+what diff?
Thread Starter
3rd Gear
Joined: Aug 2006
Posts: 3
Likes: 0
454 small block+tko600+what diff?
Howdy,
I've been modifying street machines for years but am new to the world of corvette high performance parts.
I have an '81 vette with 46k miles on the clock and will be replacing the smoggy old 350/auto combo with a World products,Motown,600 hp,454 small block and tremec TKO600 trans.
I'm having trouble finding info on the rear axle.
How does the original 1981 diff and half shafts stand up to this kind of power?
I've heard the diff internals are similar if not the same as a GM 10 bolt found in any old solid axle car, is this true?
What do I have to do to upgrade?
I'd rather replace the original low mileage rear axle assembly with something that can handle the power than end up with a mangled up piece of rubbish after pulling 6000rpm,dropping the clutch and pile driving 600 odd pounds of torque through something that may not handle it.
Cheers
I've been modifying street machines for years but am new to the world of corvette high performance parts.
I have an '81 vette with 46k miles on the clock and will be replacing the smoggy old 350/auto combo with a World products,Motown,600 hp,454 small block and tremec TKO600 trans.
I'm having trouble finding info on the rear axle.
How does the original 1981 diff and half shafts stand up to this kind of power?
I've heard the diff internals are similar if not the same as a GM 10 bolt found in any old solid axle car, is this true?
What do I have to do to upgrade?
I'd rather replace the original low mileage rear axle assembly with something that can handle the power than end up with a mangled up piece of rubbish after pulling 6000rpm,dropping the clutch and pile driving 600 odd pounds of torque through something that may not handle it.
Cheers
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I have near 600HP and my stock rear hold up, I don't abuse it too much but taking it to 6000RPM in third from 2000RPM puts a steady 500+ ft/lbs thru it and it had held to now. Street tires will spin before the rear breaks I have found and I don't sit at a light and rev the crap out of it and dump the clutch. If you ever get that motor in your Vette you won't need to rev it to 6000RPM and dump the clutch, that motor will smoke the tires off from a 60 MPH roll in third 
Revving it to 6000RPM and dumping the clutch aint gonna get you very far anyway unless you are warming up slicks, and if you are doing that you had better check into a stronger rear end from Tom's or the like
Revving it to 6000RPM and dumping the clutch aint gonna get you very far anyway unless you are warming up slicks, and if you are doing that you had better check into a stronger rear end from Tom's or the like
Thread Starter
3rd Gear
Joined: Aug 2006
Posts: 3
Likes: 0
Originally Posted by MotorHead
I have near 600HP and my stock rear hold up, I don't abuse it too much but taking it to 6000RPM in third from 2000RPM puts a steady 500+ ft/lbs thru it and it had held to now. Street tires will spin before the rear breaks I have found and I don't sit at a light and rev the crap out of it and dump the clutch. If you ever get that motor in your Vette you won't need to rev it to 6000RPM and dump the clutch, that motor will smoke the tires off from a 60 MPH roll in third
Revving it to 6000RPM and dumping the clutch aint gonna get you very far anyway unless you are warming up slicks, and if you are doing that you had better check into a stronger rear end from Tom's or the like
Revving it to 6000RPM and dumping the clutch aint gonna get you very far anyway unless you are warming up slicks, and if you are doing that you had better check into a stronger rear end from Tom's or the like
You're a legend,just the info i needed.
You have one of the best looking late C3 vettes I've seen,those convo pros really set it off.
How long have you had the tremec in your vette?
I see you have the offset shifter,where did you get it from?
Last edited by corgette; Aug 20, 2006 at 02:49 AM.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I got the Tremec TKO kit from Keisler, they are a forum sponser, it comes with an offset shifter to put the shifter in the correct place
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
It's been my experience that the stock yokes and posi units fail. Vette rearends can handle straight line action. Turning while under power is what eats the parts up.
I installed some better parts as things broke and wore out.
I installed some better parts as things broke and wore out.
