1965 Impala BBC I/S

[Dan Fahey]

Originally Posted by Tom keedle

for some reason i remember 65-70 fullsize chevies having a 3 link (2 on the bottom,1 on top) on the base models with small blocks....or am i just dreaming?
seems to me the 4 links were the higher HP models...

That was the X - Frame 1958 - 1964 Chevy/BOP/Caddy
Yes the 58 got the X-frame as GM began installing heavier engines.
GM always boosted about the ride quality.
The Lower Links were angled toward the X-Frame and no Panhard Bar.
This frame required 2 - short drive shafts and a Center Link prone to snapping. (I know that so well)

65 - 76 went to H - Frame 4 Link set up with Panhard Bar.
Spring set on the Lower Suspension Link.
Used much heavier U-joints.

Then 77 up to 96 D / B Body used the earlier 1964 & up Chevelle/BOP Mid sized car H-Frame set up.
Upper Control Arms were angled eliminating the Panhard Bar.
Spring mounted on the Axle.

The 91-96 used a 8.5inch 10bolt that has a history of being very rugged.
Someone said you can put a larger 8.75 12 bolt Carrier in it.
Never understood why they were not put in Camaro/FB?
The Drive shaft rarely had any issues.
U-Joints lasted the life of the car regardless of abuse.
For racing gears just needed a balancing and the weight tab removed from the Yoke...and still keeping the original U-joints.

On my 1995 Impala SS purchased a Dick Miller Frame Connector for the upper and lower control arms.
Think he makes it for the Plus Sized cars too.

Hope this helps..

D

[Mark Yacavone]

Originally Posted by Dan Fahey

That was the X - Frame 1958 - 1964 Chevy/BOP/Caddy
Yes the 58 got the X-frame as GM began installing heavier engines.
GM always boosted about the ride quality.
The Lower Links were angled toward the X-Frame and no Panhard Bar.
This frame required 2 - short drive shafts and a Center Link prone to snapping. (I know that so well)

65 - 76 went to H - Frame 4 Link set up with Panhard Bar.
Spring set on the Lower Suspension Link.
Used much heavier U-joints.

Then 77 up to 96 D / B Body used the earlier 1964 & up Chevelle/BOP Mid sized car H-Frame set up.
Upper Control Arms were angled eliminating the Panhard Bar.
Spring mounted on the Axle.

The 91-96 used a 8.5inch 10bolt that has a history of being very rugged.
Someone said you can put a larger 8.75 12 bolt Carrier in it.
Never understood why they were not put in Camaro/FB?
The Drive shaft rarely had any issues.
U-Joints lasted the life of the car regardless of abuse.
For racing gears just needed a balancing and the weight tab removed from the Yoke...and still keeping the original U-joints.

On my 1995 Impala SS purchased a Dick Miller Frame Connector for the upper and lower control arms.
Think he makes it for the Plus Sized cars too.

Hope this helps..

D

For the record:

65-70 full size ..3 or 4 arm (right or both uppers). Panhard bar, and springs on trailing arms.
71-76 ..Std 4 trailing arm, springs on housing , except for f/s wagons ,which were leaf springs.
77-96 Std 4 trailing arms ....7.5 rear standard in these cars... even in f/s Chevy wagons.

[Tom keedle]

Originally Posted by Mark Yacavone

For the record:

65-70 full size ..3 or 4 arm (right or both uppers). Panhard bar, and springs on trailing arms.
71-76 ..Std 4 trailing arm, springs on housing , except for f/s wagons ,which were leaf springs.
77-96 Std 4 trailing arms ....7.5 rear standard in these cars... even in f/s Chevy wagons.

ahhh, so i'm NOT crazy (even though my mother had me tested )

[Dan Fahey]

Originally Posted by Mark Yacavone

For the record:

65-70 full size ..3 or 4 arm (right or both uppers). Panhard bar, and springs on trailing arms.
71-76 ..Std 4 trailing arm, springs on housing , except for f/s wagons ,which were leaf springs.
77-96 Std 4 trailing arms ....7.5 rear standard in these cars... even in f/s Chevy wagons.

91-96 all got the 8.5 inch Rear, at least the 5.7 liter.
Have them on both my 94 Caprice Wagon an 95 Impala SS

The Camaro/FB got the little ones

D

[Mark Yacavone]

Originally Posted by Dan Fahey

91-96 all got the 8.5 inch Rear, at least the 5.7 liter.
Have them on both my 94 Caprice Wagon an 95 Impala SS

The Camaro/FB got the little ones

D

Nope....you didn't say 5.7 cars, which may be true.
305's came with 7.5's ...I had one...with a 2.56
That gives you about a 1.80 gear in OD..That's how it got 28 mpg @70 with the a/c on.

[Dwight Southerland]

Yac -

My parents had an '86 Caprice 305 that came with a 2.29:1 7.5 rear axle. I drove them to the east coast to see my brother when that car was relatively new and it got 25-26 mpg @ 70 with A/C on consistently using an electronic Qjet carb! Amazing considering the aerodynamics of that body.

[Dan Fahey]

Originally Posted by Mark Yacavone

Nope....you didn't say 5.7 cars, which may be true.
305's came with 7.5's ...I had one...with a 2.56
That gives you about a 1.80 gear in OD..That's how it got 28 mpg @70 with the a/c on.

Yeah I can see them with the smaller rear.
But have not seen one with the 4.3L LT-1 but does not mean it was not installed.

My 94 Caprice Wagon has a set of 2.56's and has touched 24mpg best loaded with family. Mostly in the 23.5 range.

The Impala SS originally had 3.08's and get a best of 23.75mpg. But consistently 23.23mpg.

When our Impala B-Body guys added the 6sp.
Some installed 4.10's and reported 25 - 26mpg.

Other TOPIC
HEY WILL...
Please send me the Photo's of your Frame.

danfahey@dansources.com