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#76 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Not doing to much this past couple a weeks. Next is the rear diff work i will be replacing the axle bearings, seals and finish welding the four link brackets. I have been trying to ID this diff for a while now but i still have no idea what it came out off. It came with the truck when i purchased it so i'm trying to make it work for my build. It has 2.73 gears in it, date code is H268 which should be Aug 26 1968. How are those gears going to work out with the 5.3 and 4l60e??
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#77 |
Registered User
Join Date: May 2008
Location: Midland GA
Posts: 332
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Re: 55 2nd serie GMC
That rearend looks very wide... How wide is it from backing plate to backing plate?
The 5.3 and 4l60e will like a 3:73 allot better... IMO it is way to high of a gear...
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1949 Chevy 408 CID stroker 6.0l with a few add ons, 4l80E, 4 Wheel Disk Brakes and a set of GT35 going on soon. |
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#78 |
Registered User
Join Date: Dec 2007
Location: Jacksonville, AL
Posts: 479
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Re: 55 2nd serie GMC
Ive definately never seen a diff. cover like that. Looks like you could paint the top brown.. put some googly eyes and a mouth on it, and your differential is turned into a dude with a chilli bowl!
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---Ben Jammin's 1955 Chevy/GMC Project --- ---The shop's live video feed--- <<< See what I'm up to! |
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#79 |
polishing a turd
Join Date: Dec 2004
Location: houston, tx
Posts: 674
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Re: 55 2nd serie GMC
it is an 8.2" gm rear. not too strong, but could be ok, depending on your hp expectations.
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59 chevy apache 31 4x4 - my project: http://67-72chevytrucks.com/vboard/s....php?p=8668512 53 buick special - straight 8 sled - blow through turbo 47 gmc - flatbed hot rod build 99 ford econoline e350 - 4x4 converted family roadtrip/overlanding rig AKA 'Monstervan' AKA 'Daddy-Van' |
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#80 |
Registered User
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: 55 2nd serie GMC
2.73 with od trans is great for cruising but you will spend a lot of time in 2nd and 3rd in town. Nothing off the line. My 64 Chevelle has 3.08, I upgraded to a TH350 from PG to get lower first gear and its still a dog in town. 3.73 with OD trans works well.
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
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#81 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Thanks for the info guys, i'm running stock 5.3 vortec /4l60E. I'm realy not building a race car here, i just want a nice highway cruiser easy on gas. i live out of town and drive 60 miles every day to go to work.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#82 |
Registered User
Join Date: May 2008
Location: Midland GA
Posts: 332
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Re: 55 2nd serie GMC
then you will want the 3:73.. If you keep the stockers you are going to have to shove your foot through the floorboard to pass someon..
Also something to keep in mind is that the weight of the vehicle plays a roll in gear ratio's along with HP... A lighter vehicle needs less gear... Also it has always been a rule for performace minded vehicles that 2900 lbs is max weight of a car with a glide...
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1949 Chevy 408 CID stroker 6.0l with a few add ons, 4l80E, 4 Wheel Disk Brakes and a set of GT35 going on soon. |
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#83 |
Senior Member
![]() Join Date: Nov 2008
Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Here the latest work on engine and tranny mounts.
A few months back I had the engine set up with late model mounts with clamp shell type bracket but i didn't like the way the engine sat. It was too low I had issues with tie rod ends touching the pan, p/steering pulley touching the steering box, so i decided to start all over. Fabricated the engine bracket as per the schematic i got from LS tech, bought new early style energy suspension mounts and solid frame bracket for early camaro. I'm much happier with this set up now. Looks a lot more professional and it raised the engine about 3/4". I now have good clearance with the steering box and the tie rod ends.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#84 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Here the tranny crossmember. I made 1 1/2" spacer to be able to have about 4 degres of tilt on the engine.
Energy suspension mount here also, the factory rubber mount was way too flexible.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#85 |
Registered User
Join Date: Feb 2004
Location: lynchburg ohio
Posts: 736
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Re: 55 2nd serie GMC
I like those mounts better also You say you got alot of your info from LSTECH.COM? I am a member on LS1TECH.com....just curious of they were the same site...Trucks is looking good!
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#86 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Yes, I'm a member there also. Just a typo.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#87 | |
Registered User
Join Date: Jan 2004
Location: Whitehorse YK Canada
Posts: 2,651
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Re: 55 2nd serie GMC
Quote:
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Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is! |
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#88 |
Registered User
Join Date: Jan 2004
Location: Whitehorse YK Canada
Posts: 2,651
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Re: 55 2nd serie GMC
Picture did not come with the reply....
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Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is! |
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#89 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
1957 international 650, diesel. Looks like W6 but a little younger.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#90 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Here is the latest, working on the tailgate linkage kit I got from Mar-K last week. You got to be very precise in all the measurements and cuts. Tolerances are very tight but it was very simple to install.
Last picture is the new diff i got today, 2005 Blazer 4x4 discs brake and 3:73 gears. It a little narrow for my liking but i may use a different offset for the back.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#91 |
*---------------*
![]() Join Date: Mar 2008
Location: Central Missouri
Posts: 1,791
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Re: 55 2nd serie GMC
Your project is coming around nice. I need to find one of those rear ends.
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2001 GMC SIERRA 1956 Chevy Panel Build Page with a Scott's Hotrods IFS 1953 Chevy trucks Project Dime Time 1968 Camaro 1968 Volksrod "NOBACK" Jared |
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#92 |
A320 Pilot/USAF Retired
Join Date: Mar 2009
Location: Charleston, SC
Posts: 2,622
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Re: 55 2nd serie GMC
What's the width of the 4X4 rear? Thanks!
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JJ My 1957 build: http://67-72chevytrucks.com/vboard/s...d.php?t=334552 http://www.trifive.com/forums/showthread.php?t=22037 Instagram - Chuckdriver57 |
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#93 |
*---------------*
![]() Join Date: Mar 2008
Location: Central Missouri
Posts: 1,791
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Re: 55 2nd serie GMC
The blazer 4x4's are 59" hub to hub.
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2001 GMC SIERRA 1956 Chevy Panel Build Page with a Scott's Hotrods IFS 1953 Chevy trucks Project Dime Time 1968 Camaro 1968 Volksrod "NOBACK" Jared |
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#94 |
A320 Pilot/USAF Retired
Join Date: Mar 2009
Location: Charleston, SC
Posts: 2,622
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Re: 55 2nd serie GMC
Got it! Thanks GRIMSS!!
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JJ My 1957 build: http://67-72chevytrucks.com/vboard/s...d.php?t=334552 http://www.trifive.com/forums/showthread.php?t=22037 Instagram - Chuckdriver57 |
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#95 |
Senior Member
![]() Join Date: Nov 2008
Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
I was actually looking for a ZR2 rear diff. I read somewhere that there even wider then the regular 4x4 . Do anyone know how wide is a ZR2 diff.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#96 |
*---------------*
![]() Join Date: Mar 2008
Location: Central Missouri
Posts: 1,791
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Re: 55 2nd serie GMC
I have 63" writen down for the ZR2 but don't know where I found it.
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2001 GMC SIERRA 1956 Chevy Panel Build Page with a Scott's Hotrods IFS 1953 Chevy trucks Project Dime Time 1968 Camaro 1968 Volksrod "NOBACK" Jared |
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#97 |
Senior Member
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Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
What wheel should i use? front or rear one
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#98 |
Senior Member
![]() Join Date: Nov 2008
Location: Fannystelle, Manitoba, Canada
Posts: 852
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Re: 55 2nd serie GMC
Here is the new rear end muck up. I don't like where the caliper sit, it touch's the edge of the box side when the suspension is all the way down.
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Jean-Marc Lacasse 57 GMC 55 GMC 55 Belair 99 S10 http://67-72chevytrucks.com/vboard/s...d.php?t=316140 http://67-72chevytrucks.com/vboard/s...d.php?t=806011 |
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#99 |
Registered User
Join Date: Mar 2009
Location: Helena, Alabama
Posts: 453
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Re: 55 2nd serie GMC
I would go with an old camaro rally wheel or something along those line. I just like the look of the old stock steelies
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#100 |
Registered User
Join Date: Apr 2007
Location: Callander Ont.
Posts: 387
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Re: 55 2nd serie GMC
Nice progress JML
The calipers look good. I like the front wheels, but then I like anything that shines BTW nice shop ![]()
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--Glenn-- http://67-72chevytrucks.com/vboard/s...d.php?t=345975 http://67-72chevytrucks.com/vboard/s...d.php?t=564403 Last edited by 57ToyBox; 05-18-2009 at 06:42 PM. |
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