![]() |
![]() |
#1 |
Registered User
Join Date: Dec 2009
Location: diamond bar, calif.
Posts: 206
|
'84 rear to '66 swap?
do any of you know if a 84 1/2 ton rear end will bolt up to my '66 c20? i'm converting to 5 lug, well that's the goal anyway. thanks fellas.
![]()
__________________
'66 c10ish straight 292 power! |
![]() |
![]() |
![]() |
#2 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
|
Re: '84 rear to '66 swap?
After some cutting welding and fabbing
__________________
62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
![]() |
![]() |
![]() |
#3 |
Registered User
![]() Join Date: Sep 2006
Location: San Francisco
Posts: 4,780
|
Re: '84 rear to '66 swap?
Dose your C20 have leaf or coil springs? Coil springs means welding perch mounts and something for the panard bar. If it is coil springs then I don't really know...
![]()
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
![]() |
![]() |
![]() |
#4 |
Registered User
Join Date: Dec 2009
Location: diamond bar, calif.
Posts: 206
|
Re: '84 rear to '66 swap?
thanks guys, i have coils in the back and was hoping for a straight forward swap, just bolt it up, so i'll pass on the '84 rear, thanks again for the input!
__________________
'66 c10ish straight 292 power! |
![]() |
![]() |
![]() |
#5 |
Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
|
Re: '84 rear to '66 swap?
the only straight swap on our trucks is from 63-69, but none of those are 5 lug, You can just buy 5 lug axles and swap. 71-87 rears are wider then the ealier 12 bolts.
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
![]() |
![]() |
![]() |
#6 |
Registered User
![]() Join Date: Sep 2006
Location: San Francisco
Posts: 4,780
|
Re: '84 rear to '66 swap?
71 and 72 diffs are straight swaps.
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
![]() |
![]() |
![]() |
#7 |
Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
|
Re: '84 rear to '66 swap?
I've heard diffrent about those 2 because they are wider.
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
![]() |
![]() |
![]() |
#8 |
Sunburst C10!!!
Join Date: Jan 2009
Location: Texas
Posts: 2,560
|
Re: '84 rear to '66 swap?
the 71-72 work fine
i have a 72 in mine with the stock 8 in ralley with a 275 60r15 drag radial and it has plenty of clearance
__________________
Gage 1967 C10 Shortbed Stepside |
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
|
Re: '84 rear to '66 swap?
The 71 72 s bolt right up but the track is a bit wider I believe 1 1/2 inches Captainfab would know for sure
__________________
62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
![]() |
![]() |
![]() |
#10 |
Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
|
Re: '84 rear to '66 swap?
Well that's good to know. I wasn't for sure if the did mount up because they are wider. I guess I didn't think about the frame being the same from 63-72 so the trailing arms would be the same.
I stand corrected.
__________________
Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
![]() |
![]() |
![]() |
#11 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
|
Re: '84 rear to '66 swap?
That is correct. The '71-'87 rear differentials are 1 1/2" wider overall than the '63-'69 rear differentials. The 1970 differentials can be either width I believe, depending on when in the year they were mfg'd.
So yes the '71 & '72 rear's are a bolt in 5 lug swap for the '63-'69 trucks. However when installed into a '63 or '64 truck the different panhard bar will have to be delt with.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
![]() |
![]() |
![]() |
#12 | |
Registered User
Join Date: Dec 2009
Location: diamond bar, calif.
Posts: 206
|
Re: '84 rear to '66 swap?
Quote:
__________________
'66 c10ish straight 292 power! |
|
![]() |
![]() |
![]() |
#13 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
|
Re: '84 rear to '66 swap?
If the truck has a "66" rear housing it is a direct bolt in . the panhard hole is cast into the housing at about the 2 O'clock position same as the 71-72 axle
if it has a 63-65 housing the panhard bracket is a fabricated piece on the RH axle tube. Upon actually reading your OP the C20 axle will prolly be a fabbed assy so maybe the panhard bar from a 1/2 ton will be needed. if you look here http://67-72chevytrucks.com/vboard/s...d.php?t=382643 the pics show a later prolly 73-87 axle in a C20 Captainfab can prolly build you a set of axle a saddles with your choice of drop built in for the later 73-87 axle
__________________
62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() Last edited by 62gmc910; 01-25-2010 at 10:42 AM. |
![]() |
![]() |
![]() |
#14 |
Registered User
![]() Join Date: Sep 2006
Location: San Francisco
Posts: 4,780
|
Re: '84 rear to '66 swap?
Gee I hope the 72 bolts in seeing I have one in my 65.
![]()
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 01-25-2010 at 11:24 AM. |
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Dec 2009
Location: diamond bar, calif.
Posts: 206
|
Re: '84 rear to '66 swap?
here is a pic of the 66's rear end, is this the 63-65 rear or a 66 housing? will the 71-72 bolt up to this panhard or do i need the 1/2 ton one?
__________________
'66 c10ish straight 292 power! |
![]() |
![]() |
![]() |
#16 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
|
Re: '84 rear to '66 swap?
The 5200# rear has a fabbed panhard mounting bracket. making a 73-87 diff swap easier if you want to go that way. If you find a 71-2 diff in good shape you will need to get the panhard bar that is attached to the 71-2 diff. the fuel tank in Chevy Fleetsides pic hides the panhard mounting
__________________
62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() |
![]() |
![]() |
![]() |
#17 | |
Registered User
![]() Join Date: Sep 2006
Location: San Francisco
Posts: 4,780
|
Re: '84 rear to '66 swap?
Quote:
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 01-25-2010 at 11:54 PM. |
|
![]() |
![]() |
![]() |
#18 |
Registered User
Join Date: Nov 2009
Location: Cremona AB Canada
Posts: 370
|
Re: '84 rear to '66 swap?
'Cause its on a 5200# axle I have a '72 C20 with the same set up Coffins truck is a C20
__________________
62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) ![]() ![]() ![]() ![]() Last edited by 62gmc910; 01-26-2010 at 12:10 AM. Reason: must learn to spell |
![]() |
![]() |
![]() |
#19 |
Registered User
![]() Join Date: Sep 2006
Location: San Francisco
Posts: 4,780
|
Re: '84 rear to '66 swap?
I also have a 66 C20 but have not looked at that part yet..
![]()
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
![]() |
![]() |
![]() |
#20 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
|
Re: '84 rear to '66 swap?
If you get a '71-'72 12 bolt , make sure you get the panhard bar with it. The '65-'72 panhard bar is shorter than the one you have on your C20 now. The shorter one will work, but you will have to slightly bend it where it bolts to the frame bracket. This is because the frame bracket for the longer panhard bar is at a slightly different angle than for the shorter panhard bar.
As an option, the panhard bar bracket on the HO52 that is in your truck could be cut off and welded onto your new rear end.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 01-26-2010 at 01:40 AM. |
![]() |
![]() |
![]() |
#21 | |
Registered User
Join Date: Dec 2009
Location: diamond bar, calif.
Posts: 206
|
Re: '84 rear to '66 swap?
Quote:
what is HO52? thanks.
__________________
'66 c10ish straight 292 power! |
|
![]() |
![]() |
![]() |
#22 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
|
Re: '84 rear to '66 swap?
A longer panhard bar is better in that there is less side to side movement of the differential as compared to a shorter panhard bar. So yes utilizing the one you have would be better than the shorter '65-'72 panhard bar. This is especially true on a lowered truck or one that has considerable suspension travel.
The HO52 is the designation for the 3/4 ton rear end that is currently under your truck.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|