What is my rear axle???
#42
Wmachine, Kurt,
I did have the fluid changed a few days ago. I do know it is not a posi rear. Do u think I should open it up and measure the gears?
Tell me is there an easy way to convert it to a posi? I have found someone selling a true 1970 W-27 rear end. Would that be worthwhile?
I did have the fluid changed a few days ago. I do know it is not a posi rear. Do u think I should open it up and measure the gears?
Tell me is there an easy way to convert it to a posi? I have found someone selling a true 1970 W-27 rear end. Would that be worthwhile?
#44
SuperCars unlimited sells a unit that will slip into your current rear and make it a limited slip. I believe it's called a locker? Check with them on the price but I am thinking around 4-500.00 for the unit and then you need to install it or have it installed.
The W-27 is pretty rare and prices reflect that. If you are going for originality and you want everything to match your window sticker, the W-27 will be an expensive option that probably will add value maybe, or to some numbers matching finatics it could be a wash in the overall price of the car.
Assuming your car is the one in the picture and you already have invested quite a bit of money, I would try to find the correct rear end if the current one is found to be not the original.
If you like the looks of the w-27 and get bored, buy it and put the original one away to go with the car if you ever sell. You could always put the original back in to sell it as all numbers matching. Depending on what you pay for the w-27 you could always sell it down the road and it will more than likely hold it's value.
The W-27 is pretty rare and prices reflect that. If you are going for originality and you want everything to match your window sticker, the W-27 will be an expensive option that probably will add value maybe, or to some numbers matching finatics it could be a wash in the overall price of the car.
Assuming your car is the one in the picture and you already have invested quite a bit of money, I would try to find the correct rear end if the current one is found to be not the original.
If you like the looks of the w-27 and get bored, buy it and put the original one away to go with the car if you ever sell. You could always put the original back in to sell it as all numbers matching. Depending on what you pay for the w-27 you could always sell it down the road and it will more than likely hold it's value.
Last edited by scrappie; August 6th, 2009 at 04:56 AM.
#45
Wmachine, Kurt,
I did have the fluid changed a few days ago. I do know it is not a posi rear. Do u think I should open it up and measure the gears?
Tell me is there an easy way to convert it to a posi? I have found someone selling a true 1970 W-27 rear end. Would that be worthwhile?
I did have the fluid changed a few days ago. I do know it is not a posi rear. Do u think I should open it up and measure the gears?
Tell me is there an easy way to convert it to a posi? I have found someone selling a true 1970 W-27 rear end. Would that be worthwhile?
I'd also take a pic of the carrier and post it. Then we'll know what you have, and what you may need.
Yes, if you don't have an Anti-Spin carrier, one can be added and still use your housing and gears. Jim at JD Race (http://www.jdrace.com) can probably set you up with a factory unit.
Re the W27 rear you found, I'd guess the price is about $5k, and since the W27 isn't original to your car (yes, *that* would be on your window sticker), *I* wouldn't go with it. Certainly not with 3.91 gears with your auto and AC.
#46
Kurt,
Thanks again.....ur advice make sense.
OK, I finally got hold of the options sheet for the 442. My sticker as u know lists the G80 which is Anti-spn, but is also lists C60. C60 required the 3.23 axle ratio. So.....I think that resolves it. My car should have a 3.23:1 "posi" with (as mentioned previously) the SF stampted on the tube.
Thanks again.....ur advice make sense.
OK, I finally got hold of the options sheet for the 442. My sticker as u know lists the G80 which is Anti-spn, but is also lists C60. C60 required the 3.23 axle ratio. So.....I think that resolves it. My car should have a 3.23:1 "posi" with (as mentioned previously) the SF stampted on the tube.
#47
Well the good news is that I have now found 3 available axles. One in the UK of all places. Another true aluminium housing w-27 about an hour from me and another non-27 SF in FL.
Though the W-27 is not original to the car I am wondering if even given it is 1.5x the price is it is worth getting and putting in.
Any thoughts or advice is much appreciated.
Though the W-27 is not original to the car I am wondering if even given it is 1.5x the price is it is worth getting and putting in.
Any thoughts or advice is much appreciated.
#48
3500 rpm at 50 miles per hour?
I don't think that's a 3.23:1 gear ratio. It must have been changed if the tach isn't way off?
Works out to about a 5.56:1 ratio in my book.
Try plugging the numbers into the rear end calculator, just need your loaded tire diameter, should be about 26-27 inches with 14's I think? The Tire Mart site has the diameters if you know the tire size.
http://www.angelfire.com/fl/procrastination/rear.html
I don't think that's a 3.23:1 gear ratio. It must have been changed if the tach isn't way off?
Works out to about a 5.56:1 ratio in my book.
Try plugging the numbers into the rear end calculator, just need your loaded tire diameter, should be about 26-27 inches with 14's I think? The Tire Mart site has the diameters if you know the tire size.
http://www.angelfire.com/fl/procrastination/rear.html
thanks this helped me out a lot! im going to switch from 3.42 to a 3.08 rear gear now!
#50
Well the good news is that I have now found 3 available axles. One in the UK of all places. Another true aluminium housing w-27 about an hour from me and another non-27 SF in FL.
Though the W-27 is not original to the car I am wondering if even given it is 1.5x the price is it is worth getting and putting in.
Any thoughts or advice is much appreciated.
Though the W-27 is not original to the car I am wondering if even given it is 1.5x the price is it is worth getting and putting in.
Any thoughts or advice is much appreciated.
#51
Good thread.
If you want to try and calibrate your tach you need a portable tach (tach and dwell meter works well for this).
Pull the dash trim and remove the tach from the dash. You can now get to the tach wire on the back of the tach. Alos you will see a round silver sticker near the top in the center of the back. Carefully pull this up to expose an adjustment screw. Now you can start the car after connecting the external tach. You can ground to the ground straps in the dash. Compare the two tachs and adjust as needed.
When I did mine I checked idle, 1500 and 2000 rpm for acuracy. Worked like a charm.
Good luck with the axle hunt and I hope this helps with the tach.
Randy
If you want to try and calibrate your tach you need a portable tach (tach and dwell meter works well for this).
Pull the dash trim and remove the tach from the dash. You can now get to the tach wire on the back of the tach. Alos you will see a round silver sticker near the top in the center of the back. Carefully pull this up to expose an adjustment screw. Now you can start the car after connecting the external tach. You can ground to the ground straps in the dash. Compare the two tachs and adjust as needed.
When I did mine I checked idle, 1500 and 2000 rpm for acuracy. Worked like a charm.
Good luck with the axle hunt and I hope this helps with the tach.
Randy
#52
Wish I had known that 20+ years ago. Being curious as to why I could start out in 4th gear and why I was turning a million RPM at 6o mph, I pulled the cover off and counted teeth. 29 on the ring and 9 on the pinion. Divide the two and you get 4:33. Before that I chalked the tire and driveshaft and counted tire revolutions to driveshaft turns. That put me in the ball park.
#53
Does any one KNOW hat a T3 code 'O' type 12 bolt is?
I was told it was a hurst olds code only 3.91 this rear has 31 spline axles and anti spin unit 672 casting. Let me know. I t may help the W-30 guy out. I have this rear diff all reconditioned and ready to go minus brakes. I do know 31 spline axle rear is rare and optional in 1967 1968. Jim
I was told it was a hurst olds code only 3.91 this rear has 31 spline axles and anti spin unit 672 casting. Let me know. I t may help the W-30 guy out. I have this rear diff all reconditioned and ready to go minus brakes. I do know 31 spline axle rear is rare and optional in 1967 1968. Jim
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