69' "O" posi ??
#1
69' "O" posi ??
Hello there, first thread other than my into.
Have the original 3.42 "O" rear in my 69 and have been looking for a limited slip but can only find one that is around $600.
Are there any other options?
Thanks
Have the original 3.42 "O" rear in my 69 and have been looking for a limited slip but can only find one that is around $600.
Are there any other options?
Thanks
#2
$600 sounds like a pretty good deal to me. I upgraded the differential on my '69 4-4-2 convertible from a 3.23 open to a 3.23 limited slip and it ended up costing about $900 before it was done. Go on line to www.supercarsunlimited.com to see what they have in their catalog. There are also a couple of differential people at this site that might be able to help.
Randy C.
Randy C.
#6
There is a two-digit code, usually on the passenger side axle tube, forward, upside down. It's usually either two letters or a letter and a number. That code will tell you the gear ratio and whether or not it's an open or anti-spin differential.
I don't know about the 4.33, but 3.42 and 3.91 were available both in the open and anti-spin versions.
Randy C.
I don't know about the 4.33, but 3.42 and 3.91 were available both in the open and anti-spin versions.
Randy C.
Last edited by rcorrigan5; March 18th, 2017 at 09:05 AM. Reason: more info
#7
I've never seen any reference to "open" rear ends in the 1969 3.42 and 3.91 ratios. This is the chart of the rear end codes for the 1969 "A" body cars. The 1969 dealer order guide says anti-spin was mandatory with the 3.42 and lower rear gears.
#10
From what I see, it could be in either a '68 or '69 "O" type axle. The '68 TY code was for 4.33 anti-spin gearing with disc brakes. The '69 TY code was for 4.33 anti-spin gearing with drum brakes (possibly disc brakes, too? Not sure about that).
Randy C.
Randy C.
#14
series 4 olds 12 bolt posi
spacer can be used with a 3 series to position the ring gear so the unit stays in the middle centered in the carrier cavity I have even seen people just install and shift the whole carrier over in the case...(which I do not recommend)
Best to get that 588 and purchase new clutches and you will have almost a new posi unit.
We have clutches if you need
I think I might have a 672 31 spline carrier if you want to go through all the trouble and money of swapping out to Moser 31 spline race axles. Jim
We can make the axl shafts too.
Best to get that 588 and purchase new clutches and you will have almost a new posi unit.
We have clutches if you need
I think I might have a 672 31 spline carrier if you want to go through all the trouble and money of swapping out to Moser 31 spline race axles. Jim
We can make the axl shafts too.
#15
I believe the "O" type axle was not available until the '68 model year. My book doesn't show that "O" types were available in the '67 model year. Only the "P" type differential was available and it could be had with 4.33 gears.
Randy C.
Randy C.
#16
o type rear in 67
Yes late model 67 had the 'O' type olds rears. The switch was mid year from Pontiac 'P' type to the 12 bolt cover 'O' type.
#17
I can honestly say that i could never find the stamping but I may have been incorrect on the ratio as memory has not been the best with this project.
It may be a 3.23 ratio as that is what would be correct for this factory 4speed air car.
I only remember my axle rebuilder, 8 years ago now, asking if i wanted to buy a limited slip..
It may be a 3.23 ratio as that is what would be correct for this factory 4speed air car.
I only remember my axle rebuilder, 8 years ago now, asking if i wanted to buy a limited slip..
#18
Thread
Thread Starter
Forum
Replies
Last Post
MDchanic
Wheels and Tires
22
August 4th, 2011 10:23 AM
81 regency
Parts For Sale
0
April 21st, 2011 06:18 PM
69OldsCutlassS
Drivetrain/Differentials
6
September 9th, 2009 01:05 PM
buzzbomb
Parts For Sale
0
January 6th, 2008 09:51 PM