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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Chassis Tech Forum -> 65-66 Rear lower B control arms, same as 67-70?
Post Info TOPIC: 65-66 Rear lower B control arms, same as 67-70?
cdnpont


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65-66 Rear lower B control arms, same as 67-70?
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Are the rear lower control arms the same on a 65 as a 67? 

 

Reason I ask, is I'd like to detail and put 4 arms together pre conversion for a 12 bolt. I'd like to do a 12 4 arm to replace the weak and worn 10 bolt 3 leg (and both are loose!!)

I have a pair of nice 67's lowers from our good member Cliff already. And have one more 65 upper bracket (from cliff).

Thanks Mark



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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RE: 65-66 Rear lower B control arms, same a 67-70?
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The GM parts books says all 65-68 lower arms interchange, together with 69-70 lower arms if it's a 6 cyl 69-70. For some reason 69-70 V8 cars have a different part number.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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seventy2plus2


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I got some rear lower control arms out of a 68 Parisienne convertible and they had the smaller front bushings. I'm pretty sure it was a V8 car.
The 69 & 70 rear lower control arms I've seen all have the larger front bushings.

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seventy2plus2


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cdnpont wrote:

Are the rear lower control arms the same on a 65 as a 67? 

I have a pair of nice 67's lowers from our good member Cliff already. And have one more 65 upper with bracket (from cliff).

 Do the pair of 67 lowers have the smaller front bushing?



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70 2+2 hardtop
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cdnpont


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seventy2plus2 wrote:
cdnpont wrote:

Are the rear lower control arms the same on a 65 as a 67? 

I have a pair of nice 67's lowers from our good member Cliff already. And have one more 65 upper with bracket (from cliff).

 Do the pair of 67 lowers have the smaller front bushing?

 Varies



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
seventy2plus2


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cdnpont wrote:
seventy2plus2 wrote:
cdnpont wrote:

Are the rear lower control arms the same on a 65 as a 67? 

I have a pair of nice 67's lowers from our good member Cliff already. And have one more 65 upper with bracket (from cliff).

 Do the pair of 67 lowers have the smaller front bushing?

 Varies

 What about the nice pair of 67 lowers you have?



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4SPEED427


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This is interesting. The parts book says lower front control arm bushing 1965 to 1970, they're all the same. But obviously real life experience overrides the parts book. (I got moderated when I used a different word!!!) They show the outside diameter as being 2.06 inches. They don't show any other front bushing for a 65 to 70 lower control arm.






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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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cdnpont


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On the spare arms I have, The front bushing is 1 5/8" shell dia. The rear is 2 1/8".

So yes, smaller on these Clint.

arm1.jpgarm2.jpg

 

 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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4SPEED427 wrote:

This is interesting. The parts book says lower front control arm bushing 1965 to 1970, they're all the same. But obviously real life experience ****** the parts book. (Am I allowed to say *****'*???!!!) They show the outside diameter as being 2.06 inches. They don't show any other front bushing for a 65 to 70 lower control arm.



-- Edited by cdnpont on Saturday 21st of November 2020 03:59:57 PM

 LOL, I've been moderated!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


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I'll change it to "overrides". That's easier on the blood pressure!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
cdnpont


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That'll work.



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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So back to those bushings, what's the deal? Why does the parts book say it all the same stuff? I don't get it.

I'm going to dig in the US Chevrolet parts book later tonight, maybe it has some other listing.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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cdnpont


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It would be nice to finally figure this out. And to understand even what the reason for the smaller bushing was.

That being said, does anyone have a single spare 65-66 rear upper? I'll need one.



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
cdnpont


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Looking through the rock auto resource, the rear uppers/rear lower, rearward are all Moog 6075, 65-70

And the lower forwards are all AC 45G11005 or Centric 60262047.

On another site I found Moog SB245 listed at lower rear forward.



-- Edited by cdnpont on Saturday 21st of November 2020 06:40:59 PM



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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This is what you get when you look up the lower front bushing.

2.06" 1962-1970

2.5" 1965-1970

2.7" 1969-1970



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
seventy2plus2


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cdnpont wrote:

It would be nice to finally figure this out. And to understand even what the reason for the smaller bushing was.

That being said, does anyone have a single spare 65-66 rear upper? I'll need one.

I have spare upper control arms from 68 - 70 (both freshly removed, or bare but blasted & painted), I've presumed they're the same as 65 - 66.   Are they different?



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70 2+2 hardtop
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4SPEED427


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I believe it is, and if the parts book is correct, 65-66 only.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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cdnpont


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65-66 are longer I believe. Thanks all the same Clint.



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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I'm glad you went through this and posted about it Mark. I'm getting ready to order 8 bushings for my car and the parts book is confusing. I think I'll just have to look on the car to see what it has. I know the uppers will be fine, they will need4 of 3964043 GM, K6075 Moog, 2.5". Also the lower rear appears to always be that number as well, at least for 65-66.

It's the lower fronts that seem to need investigation to know the correct size.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
oshawacliff


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Check this out

1967 - 1970 Chevy Impala | StrongArm Control Arms - Rear Upper - Ridetech

Eliminate the rubber connection

Allows proper alignment of rear axle and drive line level

Easily align rear with front on a 4 wheel alignment

 



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Cliff

Done Hurryin

Like the larger type for my eyes. 

 

 
4SPEED427


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RE: 65-66 Rear lower B control arms, same as 67-70?
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Thanks but I won't be doing any aftermarket type stuff on my car. I want it to look original when I've done the work. Those are likely a good idea though.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
cdnpont


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I'll be interested to see what size the lower forward bushing are Carl. I need to get my butt in gear and start putting all the stuff together for the rear upgrade.

Cliff, I did something similar in my 67, but just a single spherical joint (Johnny Joint) on the forward chassis ends ends, poly on the axle. Spohn Performance. Gorgeous pieces, they work great and the ride really isn't bad in the least. Would I do it again, I don't think so. I'm getting old and like soft, mushy and... cheap.

14714460767_54399ddb01_z.jpg

 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
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4SPEED427


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Mark, your 65 had 6 bushings the same, the other 2 (the lower arm forward bushings) were different?

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
cdnpont


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I don't yet know what size the forward lowers are. Never looked.

 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


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Ah, ok. For some odd reason I thought I recalled seeing you had posted pictures of changing all the bushings on it a while back. 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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