9.3 Open To Posi Mod
#4
I would be interested to hear what FabCraft has. I am not ready to put LSD in my '57, but I am researching now.
What I have learned from this site is '57-58 uses 29 spline axles and '59-64 uses 31 spline axles.
Also from this site, there seems to be no one producing ring and pinion sets in the 3.00 to 4.00 range.
What I have learned from this site is '57-58 uses 29 spline axles and '59-64 uses 31 spline axles.
Also from this site, there seems to be no one producing ring and pinion sets in the 3.00 to 4.00 range.
#5
Its not bad putting one together at least has thread adjusters for the ring gear like a 9" Ford so you wont have to buy a shim kit. Fabcraft on Ebay has the new Posi units for this 57-64 31 spline Pontiac Olds 9.3 rear. He sell a thick ring set of gears in 3.42 , 3.64 3.90 etc so it will fit the more common OEM 2.69. 2.87, 3.08, 3.23 ratio factory posi units. His new Posi units are also the 2 series so you can retain your original 2.69 2.87 3.08 or 3.23 if that is what you like or buy his 3.64 and his Posi and go all new. I did his 3.64 gears on my 63 Catalina recently after I found a good deal on a local 2.69 Posi (Safe t track) Pontiac rear . Check out his Ebay Store for your needs http://stores.ebay.com/Fabcraft-Meta...=p4634.c0.m322
#8
#14
#16
None of them , as far as I know .
However . Dutchman makes 31 spline axles for a '57 .
https://www.ebay.com/itm/Axle-shaft-...hX4wfC&vxp=mtr
However . Dutchman makes 31 spline axles for a '57 .
https://www.ebay.com/itm/Axle-shaft-...hX4wfC&vxp=mtr
#17
None of them , as far as I know .
However . Dutchman makes 31 spline axles for a '57 .
https://www.ebay.com/itm/Axle-shaft-...hX4wfC&vxp=mtr
However . Dutchman makes 31 spline axles for a '57 .
https://www.ebay.com/itm/Axle-shaft-...hX4wfC&vxp=mtr
Jim
#18
#19
I am not sure what ratio is in the '57 now. LSD didn't come out til '58. I was hoping to have two setups....... one for the highway and trips and one for "short trips" (1/4 mile or around town). I would like to use one set of axles as well as convert the existing '57 rear end to LSD. I am thinking about 4.10 to 4.56 for the short trips.
I thought I read on a thread here that stock 59-60 axles could replace the 57-58 because they were the same length. The 31 spline units are far more available.
I did check out the Dutchman site a couple weeks ago and $180 per axle is what it is. I have browsed FabCraft but haven't called them.
Another factor............. I am "building" a '64 Olds Starfire with a"warmed up" 455 and Turbo400. I could swap center sections back and forth between them.
#20
59 and up axles are longer than 57-58 . This was due to an increased tread width .
If you have a 57 or 58 you will have to use aftermarket axles with a 31 spline diff unit .
#21
I would certainly be willing to use aftermarket axles when I can find a good LSD.
#22
9.3 axles 57 olds
Those axles are not even the correct length for the year? also pontiac same years as Olds were always wider.
So I hope they give enough to cut the threads and then hope there is not a disclaimer on axles about cutting drilling etc will void any warranty like other axle companies...
Just trying to point out deals these companies make like a catch 22 deal... Watch out.
Jim
J D
So I hope they give enough to cut the threads and then hope there is not a disclaimer on axles about cutting drilling etc will void any warranty like other axle companies...
Just trying to point out deals these companies make like a catch 22 deal... Watch out.
Jim
J D
#23
Those axles are not even the correct length for the year? also pontiac same years as Olds were always wider.
So I hope they give enough to cut the threads and then hope there is not a disclaimer on axles about cutting drilling etc will void any warranty like other axle companies...
Just trying to point out deals these companies make like a catch 22 deal... Watch out.
Jim J D
So I hope they give enough to cut the threads and then hope there is not a disclaimer on axles about cutting drilling etc will void any warranty like other axle companies...
Just trying to point out deals these companies make like a catch 22 deal... Watch out.
Jim J D
Jim, I heard you were one of the "Go To" people on the subject. I knew the Pontiac "Wide Track" axles were 1" longer.
I was "hoping" to convert a 57 open to a "posi" and convert to 31 spline. Is this realistic ? I might try to send you a PM tomorrow.
Ralph
#25
9.3 anti spin
Tried to better in places we could.
The first designs were Spicer power lock units... that is a good design but spider gear teeth were kind of small and buying and or finding parts for the unit was getting expensive. We were waiting for Brad a fabcraft to build the cases for the spicer unit but it did not happen only the parts for the internals were ever made. I decided to make our own unit before the gasser craze left for another 20 years. After we got the unit running brad stuck up a deal with Auburn to finally produce a unit for them. That unit is a cone type unit which is not rebuild-able It is a good unit but I am sticking with my design I think it works well and should have longevity. I have made Detroit lockers, true tracs Power trax, all in the 9.3 form... etc. This is what I try to do...Solve problems of no parts.
We did the Buick 8.25 rear and made gears for this axle housing assembly where there was NO aftermarket support at all. We now have 3.42 3.64 gears and carriers to fit the 2.73 2.93 3.23 3.42 gears etc.
Jim
J D Race
#26
9.3 conversion
We will need some measurement and discuss some other stuff to get a game plan.
ALL 57-64 can handle 29 or 31 spline units and gear ratios.
I am pretty sure the early 9.3 57 58 had different offset backing plates with smaller width shoes.
Hoping someone can confirm this I have parted out many rears, BUT for some reason I never got into measuring the shoes and backing plates for confirmation and can not find too many raw original specimens to confirm in this area.
JIm
#28
Charlie,
Thanks ! I can't seem to print it out tonight. My eyes are getting foggy and my concentration is dropping off. I want to study the information more closely in the morning. Maybe I can explain better later.
Ralph
Thanks ! I can't seem to print it out tonight. My eyes are getting foggy and my concentration is dropping off. I want to study the information more closely in the morning. Maybe I can explain better later.
Ralph
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