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Username Post: 1950 rear axle swap        (Topic#361760)
russbucklin 
Newbie
Posts: 10

Reg: 10-26-18
07-13-20 11:29 AM - Post#2798599    

Hi All,

Getting rid of the torque tube. Ford 9 is a budget buster so going scrap yard hunting. What rear ends best fit the 49-54 Chevy cars?

Top of my want list, I think, is a 10 bolt 8.5in posi in 2.73, unless someone has a better idea?



 


Lead sled 
Frequent Contributor
Posts: 2035
Lead sled
Age: 60
Loc: Walton,NY.
Reg: 11-04-09
07-13-20 12:50 PM - Post#2798600    
    In response to russbucklin

If you can find any left, 1st gen Camaro/Firebird,or the '55-57 Chevy.Still have to relocate the spring perches.

Late yr model (Dec. 51 BelAir/ 52 trim), with a basically stock 67 Camaro SS350/295hp Turbo Fire Edelbrock 1405, Saginaw 4spd/355 geared 55/6 Chevy rear.2,1st place,and 1 top five award trophies so far
http://www.picturetrail.com/bris51deluxe


 
mahlmann 
"10th Year" Gold Supporting Member
Posts: 1785
mahlmann
Age: 76
Loc: Las Cruces, NM
Reg: 01-20-11
07-13-20 12:55 PM - Post#2798601    
    In response to russbucklin

'55 - '57 Chevy drop in easily with only one new hole to drill on each side to center the'50 axle in the wheel wells. I recently swapped a '56 Chevy rear axle into our '50 tin woody station wagon.
Here are the instructions I followed from DZAuto:
Yes, I have a few tips.
Mainly, two things. Attaching the 55-57 axle housing to the 49-54 style leaf springs, AND, emergency brake cable hookup.

You will need the 55-57 style axle housing, U-bolts and anchor/shock plates.
Drill NEW holes in the leaf spring pads on the axle housing 1 1/2in FORWARD and 1/2in INBOARD of the existing holes in the spring pads.
The 55-57 style shocks are a direct fit (I have Gabriel air shocks on the 51 for a 55-7 Chevy.

Disconnect the em brk cables from the stock wagon backing plates/brake lever inside the rear brakes. Attach the wagon's em brk cables to the 55-57 style backing plates/brake lever.
The 55-57 style axle housing will now sit right down onto the stock style 49-54 leaf springs. Other rear axle housings, such as Nova, Camaro, etc, can be used, but the 55-57 style axle housing is the most simple and easiest to use and parts for all 55-57 rears are plenty available. One of the things I love best about 55-64 rear ends is that the center section is removable and can be put on the workbench to be worked on, without having to remove the entire axle housing (ie Nova, Camaro, etc).
ANY 55-57 rear axle assembly can be used to convert a 49-54 to open driveline, but of the 3, the 57 is slightly more desirable. But I would never hesitate to use a 55-56 axle housing and axles.
The 55-64 removable center sections are a 100% swap, BUUUUUUUUUUT, the 57-64 are much better/stronger than the 55-56 center sections and more parts are available for the 57-64 centers. Also, aftermarket posi units (Eaton, Nitro Power Lock) are available for the 55-64 rears and if you are doing a total rear end swap------I would REALLY encourage you to add a posi.
My 51 is now on its 6th engine (216, 261, 283, 327, 350 SB489). I kick myself everyday for switching to a V8. I really wish I had stayed with my 261 that was once in the car. A bore/stroke to 283 is possible with a 261, and when converted to a 12v system and adding air cond (which I did to the 51 back in 1966), provides plenty of torque to turn a 3.08 rear and handle an air cond compressor. Plus you have a "modernized" stovebolt 6cyl. You know, it's kind of like having an early Ford with a modernized flat head engine and a 60s-70s style Ford 4sp.

Oh yes, if you are keeping drum brakes, I would STRONGLY recommend locating a 51-54 Chevy front end donor and convert to 51-54 front drums. With a good master cylinder (my 51 STILL has the original style under floor style MC), good brake lines and all 4 drum wheel cylinders/shoes/drums, these cars have excellent brakes. With the 389-Muncie-57 style rear in my 51, with BONE STOCK 51 drums, it stops great. I don't road race the 51, thus, overheating the drums is NOT an issue.

Good luck with yours!







Mike Ahlmann
Las Cruces, NM
'50 Tin Woodies (two) Ramon and Willard
'58 Impala Sport Coupe
'69 El Camino SS-396
'07 Ford F150 to haul parts for above
'16 Ford Explorer 3.5 EcoBoost - Red Rocket


 
GreatNorthWoods 
"6th Year" Silver Supporting Member
Posts: 1141
GreatNorthWoods
Age: 78
Loc: Littleton, New Hampshire,...
Reg: 03-31-02
07-14-20 04:09 AM - Post#2798652    
    In response to russbucklin

I have an 8.2 10-bolt from a 1970 Nova in my '53 Sport Coupe with a 3.08 gear. I'm pretty sure an 8.5 out of a mid-70s Chevelle or similar car would be the same width. I can't run fender skirts on the rear with 7 inch wheels though.

Vern

1953 Chevy Belair Sport Coupe - 355 Blueprint Engine, 700-R4, EZ Wire, Vintage Air, Ididit column, Cruise/Tilt, PS, 59 Corvette Steering Wheel, 4-Wheel Discs, Posies Rear Springs, Coker Radials, Nova 10-bolt, Mustang II, NCA Continental Kit.


 
bolake 
Poster
Posts: 60

Age: 73
Loc: Northern MN
Reg: 09-05-17
07-14-20 06:02 AM - Post#2798662    
    In response to russbucklin

Remember reading some where that a S10 Blazer rear end was a good fit

If your not the lead dog the view never changes


 
gcrkfrd 
"3rd Year" Silver Supporting Member
Posts: 172
gcrkfrd
Age: 73
Loc: Neosho, MO.
Reg: 04-01-18
07-14-20 10:14 AM - Post#2798694    
    In response to bolake

S-10 blazer is what I have in 52.

52 Styleline Fourdoor 62 235 PG


 
Dean50 
"14th Year" Gold Supporting Member
Posts: 1541
Dean50
Loc: Detroit area
Reg: 01-02-07
07-14-20 01:40 PM - Post#2798717    
    In response to bolake

Yes, the 4 wheel drive S-10.

Dean50



 
johnwd98 
Contributor
Posts: 495
johnwd98
Age: 71
Loc: Little Falls, MN
Reg: 09-05-10
07-15-20 05:23 AM - Post#2798778    
    In response to russbucklin

I have an S-10 4X4 with 3.73 gears. No complaints so far. If you feel you must have 2.73 gears, maybe only the earliest years of S-10's, before overdrive transmissions, would work for you.

1950 Fleetline, 355 TBI, mild cam, 700R4, 3.73 posi rear Blazer axle, MII front. Remote door and trunk locks, GM cruise control, A/C,


 
51chevcoupe 
Gold Supporting Member
Posts: 126
51chevcoupe
Age: 58
Loc: Washington state
Reg: 08-14-09
07-28-20 11:56 AM - Post#2799767    
    In response to russbucklin

Hey Russ, have you calculated your highway engine speed for your rear end ratio? Curious how you chose the 2.73 gears. I believe you said that you are going to run a SBC 350 and a 5 speed trans., won't that be too high geared with OD?

Ed
1941 Master Deluxe 2 door sedan- 283/TH350
1950 Fleetline 2 Door project
1950 Styleline 4 Door sedan
1951 Ford Deluxe 4 door sedan- 302/AOD



Still confused after all these years!


 
russbucklin 
Newbie
Posts: 10

Reg: 10-26-18
09-13-20 09:10 AM - Post#2803375    
    In response to 51chevcoupe

Hi guys,

Been absent for a while but progress on the car has been decent. So far we have:

- Stripped and painted the front frame
- Cleaned rebuilt and repainted front suspension
- Installed power steering
- Installed front disk brake conversion
- Installed T5 trans mount cross member (from
HRW)
- Removed the interior and now stripping the
floors

Planned next step is rear end and rear suspension, then roll it out of it's hole and fit the engine/trans.

Anyone know if a 77 camaro rear fits? I don't mind cutting stuff off and rewelding new perches etc (prefer not to if it can be avoided though) Otherwise, gonna have to go on a junkyard search for and S-10 rear. I'm a little concerned there because the majority of those are 7.5in. May be a little weak for the 350.

Thoughts?



 
russbucklin 
Newbie
Posts: 10

Reg: 10-26-18
09-13-20 09:11 AM - Post#2803376    
    In response to russbucklin

51Chevycoupe:

I originally calculated the rear dif ratio to accommodate a Muncie 4spd. Now going T5 5spd so looking more at 3.50ish ratios



 
arkansas 
Member
Posts: 293

Loc: arkansas
Reg: 09-26-06
09-14-20 06:42 AM - Post#2803439    
    In response to russbucklin

I'm running a rear out of a 78 firebird in my 49 coupe. I had to relocate the spring perches and find springs to give me a stock ride height, but it fit. I'm running 235/70 R15's and they barely fit with a small amount of hammer work on the inner fenders. I would think the 77 camaro would work fine as well. Narrower tires would have fit great.

1949 Deluxe Coupe 400sbc, 700r4, 3.73 posi
1949 4 door Fleetline Special, all original
1949 2 door Fleetline Deluxe rustbucket parts
1971 Chevy 1/2 ton shortwheel base, 250 I6, 2004r, underconstruction
1926 Ford T bucket, 250 Chevy, T350 tranny


 
z28summit 
Contributor
Posts: 128

Reg: 06-11-14
09-14-20 07:36 AM - Post#2803444    
    In response to russbucklin

I plan to go with a 10 bolt 3.73 from a second gen camaro, or one from a fist gen camaro if I can buy it; I'm second in line for it...

What width of spring are you going to use?



 
russbucklin 
Newbie
Posts: 10

Reg: 10-26-18
09-14-20 10:07 AM - Post#2803458    
    In response to z28summit

Actually looking at spring options now. I'm staying at stock height for now, I like the look personally. The original leafs are coated in grime but appear otherwise healthy so may stay with those. Next choice is a stock height replacement spring. Any suggestions along these lines? One thought is that a modern manufactured spring might ride or handle better than one mad 70 years ago. What do you guys think/know about that?



 
z28summit 
Contributor
Posts: 128

Reg: 06-11-14
09-14-20 10:44 AM - Post#2803460    
    In response to russbucklin

I've read going with a wider spring than stock will give you a better ride. Someone should make a wider spring with stock mounting dimensions?



 
Mike JW 
"8th Year" Gold Supporting Member
Posts: 1476
Mike JW
Loc: Arroyo Grande, CA
Reg: 01-19-06
09-14-20 02:32 PM - Post#2803481    
    In response to z28summit

You may what to check out Poises Springs. Stock height is what I have in my car.



Edited by Mike JW on 09-14-20 02:33 PM. Reason for edit: No reason given.

 
GreatNorthWoods 
"6th Year" Silver Supporting Member
Posts: 1141
GreatNorthWoods
Age: 78
Loc: Littleton, New Hampshire,...
Reg: 03-31-02
09-16-20 06:57 AM - Post#2803567    
    In response to russbucklin

A mid-70s Chevelle Malibu will have an 8.5 inch 10-bolt. I put one out of a 75 Malibu 4-door under a 49 Ford pickup project a few years ago. I have a 70 Nova 8.2 inch 10-bolt in my 53 Sport Coupe with Posies replacement rear springs for a 53 Chevy. The Posies springs dropped the rear about 2 inches.

Vern

1953 Chevy Belair Sport Coupe - 355 Blueprint Engine, 700-R4, EZ Wire, Vintage Air, Ididit column, Cruise/Tilt, PS, 59 Corvette Steering Wheel, 4-Wheel Discs, Posies Rear Springs, Coker Radials, Nova 10-bolt, Mustang II, NCA Continental Kit.


 
40grit 
Contributor
Posts: 749

Age: 75
Loc: Chattanooga, Tn
Reg: 07-08-13
09-16-20 03:49 PM - Post#2803606    
    In response to GreatNorthWoods

They are getting pretty scarce but if you need a really stout rear axle a 9” Ford from a Granada or Lincoln Versaille is narrow enough. It is also a chunk style rear which makes changing gear ratios very easy.

I am running 8” wheels on the back of my '53 and even have 1/4” spacers behind them.

John

Just Slightly Abrasive


 
z28summit 
Contributor
Posts: 128

Reg: 06-11-14
09-17-20 02:54 PM - Post#2803680    
    In response to GreatNorthWoods

Did you relocate your shocks with the Nova rear?



 
GreatNorthWoods 
"6th Year" Silver Supporting Member
Posts: 1141
GreatNorthWoods
Age: 78
Loc: Littleton, New Hampshire,...
Reg: 03-31-02
09-19-20 06:15 AM - Post#2803793    
    In response to z28summit

Sorry, have a bad case of CRS today. I don't remember if I used the stock '53 shocks or '70 Nova shocks but whichever I used there was no fabrication involved. It was a bolt on deal.



Vern

1953 Chevy Belair Sport Coupe - 355 Blueprint Engine, 700-R4, EZ Wire, Vintage Air, Ididit column, Cruise/Tilt, PS, 59 Corvette Steering Wheel, 4-Wheel Discs, Posies Rear Springs, Coker Radials, Nova 10-bolt, Mustang II, NCA Continental Kit.


 
russbucklin 
Newbie
Posts: 10

Reg: 10-26-18
09-23-20 09:32 AM - Post#2804147    
    In response to GreatNorthWoods

OK,

Picked up a low miles S10 Blazer 4x4 rear, 3.73 posi with disks.

Question: While the WMS to WMS distance is the same as original at 60in, the backing plate to backing plate distance is several inches narrower. After I install spring perches at 45in centers, will my leafs clear the ebrake brackets on the calipers? It looks really tight.

Thanks,

Russ



 


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