Howdy, Stranger!
It looks like you're new here. If you want to get involved, click one of these buttons!
Categories
- All Discussions27,031
- Orphaned Marques
- ↳ Hudson21,103
- ↳ Street Rods807
- ↳ Off Topic573
- ↳ American Motors148
- ↳ Kaiser - Frazer70
- ↳ Nash70
- ↳ Packard163
- ↳ Studebaker122
- Classic American Cars
- ↳ Ford Motor Company956
- ↳ Chrysler Corporation477
- ↳ GM Corporation1,396
- ↳ Post War Chevrolets75
- ↳ Pontiac Forum119
- General
- ↳ All makes1,958
- ↳ Poll Discussions24
- Swapmeets & Events
- ↳ Events130
- ↳ Swapmeets108
- Hot Rod Corner
- ↳ Ford Rods90
- ↳ Lead Sleds67
- Special Interest Groups
- ↳ The Flathead Forum139
- European marques
- ↳ MG Car Company2
- ↳ Mercedes-Benz2
In this Discussion
- 18436572 June 2008
- BJ__TN May 2008
- John Nap June 2008
- Oldcar_Mechanic June 2008
72 Impala rearend swap
-
Working on my wife's hot rod, a 72 Chevy Impala, anyway she loves it!
The rear end gears are highway gears (3.08) with a 350/350. I have juiced the engine to a aluminum intake with Q jet, HEI ignition and one wire alternator. The tranny I plan to swap to a 700r4.
The rear end has been howling at me everytime I take it out for a spin, so I tore into that. Typical corporate 10 bolt with trailing arms and coil springs. Dropped the rearend onto the floor to make repairs easier. Opened the rearend cover and to my surprise, a 12 bolt ring gear! Have you ever heard of such a thing?!?!?! I have spoken to people from the east coast to west coast to the great lakes. People tell me I am wrong - I have a 12 bolt cover and 10 bolt ring gear. Look, I can count! 10 bolt cover and 12 bolt ring gear. Well no one makes a gear set for that.
My question . . .
What years and makes and models can I go after in the junk yards to find a replacement rearend that is a normal rearend that I can get an aftermarket gear set? I know I can get another 72 Impala but they are hard to find. How about a Chevelle, or Cadillac, or Olds 98, or Buick 225 and what years. I know a 71 Impala convertible rearend won't fit!
Please help and thanks in advance. -
I have been told that the cover bolts have nothing to do with what is inside the pumpkin. I can't understand why you can't get parts for the inside. I wouldn't think that the cover has anything to do with it.
Ron -
The Bolts holding the ring gear have nothing to do with it being a 10 bolt or a 12 bolt. The 10 bolt has 10 bolts holding the cover on, the stronger 12 bolt has 12 bolts holding the cover. You should be able to get gear sets at any speed shop. Take the old one with you.
Bob -
Thanks for the clarification
Ron -
Well I can tell there is no intelligence here! A 12 bolt refers to the number of bolts holding the ring gear to the carrier. I KNOW THIS!
I have already talked to ALL the national gear set companies. They do NOT make the replacement gear sets. I KNOW THIS!
I asked what years of rearends are able to swap with this car. -
If there is no intelligence here then get the hell out.
Ron -
Don't be getting upset. He was spewing bu11cr@p and I was just calling it bu11cr@p! And I was surprised no one else called him on it.
This is a clip from my Chilton's manual. . .
The tern "10-bolt", as pertaining to the rear end of the car, refers to the number of bolts retaining the ring gear to the carrier inside the differential. Fortunately (or unfortunately), this number usually corresponds to the number of bolts holding the differential cover, so you can usually tell whether you have a "10-bolt" or "12-bolt" rear from the number of bolts on the outside of the casing.
He didn't even answer my question.
I would like to know what other car (year and make) will fit this 72 Impala. Mine has been partially submerged and is not usable. I need to swap the entire rearend, not just internals. I would like a larger search field than just looking for a 72 Impala.
Sorry, didn't mean to upset you. -
It is by coincidence that the bolts holding the ring gear and amount of bolts holding the cover are the same on the differential, however makes identification easy as stated in Chevrolet by the Numbers. Most salvage yards have an interchange book ( Hollander ) or a Mitchell computerized system that would tell you which rear ends will fit your car. I would call a larger salvage yard and ask them. John
