Ranzan

I`m going to be opening up my rear end in the next day or so but I noticed some play in the right side axle.. there is none on the left is this normal?
by movement I mean the shaft has play going in and out of the housing a little bit

it is a O type open not sure the ratio in it yet

If this movement is not normal what should I be looking for ..axle seal maybe ?

joe_padavano

If there's in/out movement, chances are the bearing is going bad. Replace the seal at the same time.

507OLDS

If this is a 67-69 axle,I would also remove the bearing,and make sure the shaft itself is still good.Those shafts are notorious for the bearings spinning on the shaft,thus turning them down,& leaving the bearing to float around or oscillate on the shaft.If this is the case,a bearing replacement will not correct much.You will need to replace the shaft too.

Ranzan

Joe & Brian thanks for the replys..... I`ll see what I have to deal with maybe today. I have 2 rear ends to go through. Maybe one is better than the other If I`m doing one shaft should I do the other as well? not really into pouring a ton of money into a open

oh and yes both are 67

J-(Chicago)

any more end play than .030" and it needs replacement attention in my opinion.

Ranzan

Thanks J

Ended up checking my roller rear end..... I guess the old owner had just rebuilt it.... I had never looked before but everything is new inside plus it has new brakes... stripped it and just got back from the blasters with it.... painting tonight

Side note R2 stamping on right side tube gotta go look up the gear ratio

Ranzan

So I`m guessing this rear has been replaced with a 68/69 ? I can only find the R2 code as a 2.56 or am I wrong? or can I also go with the carrier casting #s

J-(Chicago)

Cover Bolt Count 12
Ring Gear Bolt Count 10
Ring Gear Bolt Size
7/16 right hand thread / aftermarket gears 7/16 left hand thread
Axle Spline 28 bolt in axle 60 degree spline

31 bolt in axle (SPECIAL 67-68 SUPER DUTY OPTION)
Pinion Spline 27
Yoke Style U Bolt & Nut Universal Joint retention
Pinion Diameter 1.625 <<<< AFTERMARKET GEARS ARE AVAILABLE FOR 12 BOLT OLDS(For 3 series carrier only)
Axle Shaft Diameter 1.382 press on bearing
Supported Cars:
Car Year
442 67-68
Cutlas 442 (USA ONLY) 69-70

Part Part Number
Carrier Bearing LM501349
Carrier Bearing (Race) LM501314
Inner Pinion Bearing M802048
Inner Pinion Bearing (Race) M802011
Outer Pinion Bearing 86649
Outer Pinion Bearing (Race) 86610
Pinion Seal 2043
Axle Bearing 67-68 SEALED BEARING RW507CR
Axle seal 67-68 INNER TUBE SEAL 8594S
Axle Bearing 69-70 OILED BEARING A9
Axle seal 69-70 EXTERNAL SEAL 712146

12 Bolt O Axle

CARRIER CASTING NUMBERS

(O.E. ANTI-SPIN CARRIERS)

Casting Number


673
1967-1970
2.56-2.73
28 spline axles

671
1967-1970
3.08-3.23
28 spline axles

588
1967-1970
3.42-5.00
28 spline axles

672
1967-1968
3.42-5.00
31 spline axles

Ranzan

wow thanks J

J-(Chicago)

R2, R6, and R8 were used as 2.56 ratio stampings.

Ranzan

Thanks again guys for your help glad the other rear was in good shape
like I said not into dumping a ton into an open rear...2.56.... was hoping for steeper but it will have to do for now as chassis funds have come to a close for now after She is driving again I will look into a posi unit