www.jdrace.com

here is her real race car lol. it is 1971 vega back with a fiber glass front 78 clip. chassis car 9.60 at 140mph on 3/4 throttle at this time...shes only 20 years old and does not drive it as much as i would prefer to give her full throttle yet.

IF YOUR JUST HANGING AROUND THE STREET - Build the 7.5 rear... 28 spl9ine axles Posi and gears. It will take it. If you are hitting the track with stick shift or high stall slicks then ...well you likely need an up grade. !2 bolt chevy rear for your car will be in the 40000.00 range Not worth the ef...

Sorry this rear sold months ago. We try to keep up with the ads as much as we can. The Business of building diffs is top priority. We are SWAMPED everyday.

Jim
JD Race

well... you really need a press. Some people will tell you to put the pinion in freezer and the bearing can be heated in the oven or some I have seen torches like propane etc... BUT the proper way is the press. We just use old beaing inner races after removing the bearings and cage then hone the ins...

Nothing that will direct swap. It is all custom 9" is usually what you would need to use and get all your brackets from your old rear and cut them off and reweld to the 9" housing same with the upper ears you can get those from Speedway and weld them on too. ...It is really the only way th...

You really should not need to- some bearings come packed with grease.... but as long as you oil them pretty good while spinning the bearing that should be good then install them right away. you can also squirt extra gear oil in the axle tube also. If the rear is out of the car and you have every thi...

>>>>>>>>>>>>> SOLD <<<<<<<<<<<<<< HERE IS A HARDER TO FIND GEAR RATIO - 10 BOLT 8.2 BOP A BODY 1967 - 1972 ERA GTO GRAND PRIX LEMANS TEMPEST SKYLARK CUTLASS T37 ETC. 3.23 RATIO ORIGINAL REUSED GM GOOD QUIET GEAR NEW AUBURN 3 SERIES POSI UNIT NEW BEARINGS AND SEALS NEW UPPER CONTROL ARM BUSHINGS INST...

well it appears to have the correct offset to hold the 3.55 gear set make sure when you pull your open carrier you take both carriers and slide them side by side to make certain they ring gear lands are the same height. That will mean you can put the 3.55 on the carrier and offset will be correct. Y...

checking... let us know if you found a set. Jim

Will try to answer what ever questions you have...WE specialize in GM rear diffs but are pretty knowledgeable about most stuff. If we do not know will direct you to someone that can help in most cases.
Jim
JD Race

Where is the PINION? It is a Buick Olds Pontiac Limited slip cone type posi original FACTORY unit. The ring gear IS 4.11 set-up I know it has GM stamped into the gear...BUT does not have a part number leading to me believing it is a OLD scholl after market gear like Zoom or some old performance gear...

wELL A CAGE IS THE BEST WAY TO KEEP IT FROM TWISTING. the CAR SHOULD NOT TWIST IF YOU ARE STREET BouND. My kid races hers ...BUT it is 2.56 gears with a V8 270hp Boat motor from the summit racing scratch and dent table...LOL. Really it was a 500.00 long block sbc motor. 14.50 et 1/4 mile with 2.56 g...

Gears, My race car is only 3.73 gears and run those numbers.. and pull the fronts.... BUT REMEMBER...my car is a RACE car ONLY. Does not go on the street. BRAKES- think your a little mixed up on that stuff too. THe BACKING PLATES must be used from 1977 - 1980 9.5x2 drum system the 75 76 did have 9.5...

Moser axles on Ebay -
By the way everything at MOSER just increased in price AGAIN this year.
comes with new metric studs like s10


https://www.ebay.com/itm/265827869700

Well strip is where you will be at a disadvantage... WHAT are you expecting to do? How often? The build: 4.10 is better than 4.11 as even GM has realized that as they do not use that ratio anymore. 4.11 is 9 - 37 4.10 is 10 and 41 MORE teeth give you more touch point and bleed the heat off better so...