Gain extra benefits by becoming a Supporting Member Click here find out how!
Silver
Gold ***Platinum***
impalagirlA White Sport Coupe (4)rods46truck
farmerdick jsanctuarymarccan2Paradox SammyJohns winstead
ChevyGuy78trcunnigus
Bowtie_Guy (6)
bajones238 (4)
65 Malibu
smokinjoe65SS (2)

YellowSub (5)
Classic Performance Products
Ciadella Interiors American Auto Wire Art Morrison.com
Exile® Battery Keeper™ 6/12 volt charger w/ LED battery monitor
Hellwig Products IncPerformance Rod & Custom
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy

  >> Switch to Mobile Version <<

Recent Hot Topics
Current Quote
"I have noticed that there are tons of requests for help from all over the place me included and I would just like to give a big thanks to all the people who keep this up and going and are there to help us all out learning about some of these things."
~ New Member
Recent Topics
Join the Community today







Username Post: looking to change rearend of my truck        (Topic#213062)
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
03-27-09 10:07 AM - Post#1662403    

hey guys im looking to change the rear end gear in my 68 chevy truck, it a 3/4 camper special. 8 lug, 1 ton rear end, im putting a super charged v8 in her and i want to be able to go to the strip and have fun with it. it has a tall gear in it now like a 4-55 or taller not sure, does any one have any ideas on what gear i can use, the rear end is a 12-bolt . well let me know what i need to do to achieve this goal. thanks.

 
This Forum is Sponsored by
bobschevytrucks.com
Visit Impala Bob's forum on ChevyTalk
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
03-27-09 12:31 PM - Post#1662522    
    In response to reborn 1968 chevy truck

Some of what you are saying just doesn't make much sense. First, a 12 bolt rear would belong to a 1/2 ton truck. A stock 3/4 or 1 ton rear will have a removable center section and a removable cover plate, both perfectly round and held with 10 bolts. If the rear you have in there now doesn't look like this, please post a pic of it.
http://chevy.oldcarmanualproject.com/booklets/47st...

Second, 4.55 is hardly a tall gear. If you are running quarter mile drags it's probably about the shortest gear you would want to run unless you have huge tires.

Your present gear ratio doesn't have to remain a mystery because it is easy enough to count.

Put matching marks on the pinion yoke and differential housing. Jack one rear wheel off the ground, put the transmission in neutral, and the parking brake off. Turn the wheel exactly TWO revolutions and count how many times the driveshaft turns, estimating any fractional turn as closely as possible. That number is your axle ratio. If the wheel is difficult or impossible to turn, you may have posi. In that case, jack both rear wheels off the ground and turn either of them only ONE revolution. Count the driveshaft turns the same way as for an open rear.

Once you determine what kind of rear you actually have in there and find out what the ratio is, then you can decide where you want to go with the gearing.

Lastly, you are on the 67-70 car board here. Scroll down the forum list and you will find the trucks.

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
03-31-09 07:56 PM - Post#1665904    
    In response to raycow

well thanks for the advice, but i know that the rear end is a 12 bolt, because the rear end number says its a 12bolt 1 ton.. also i know that its not a posi track because i tried doing a power brake and only one wheel took all the power. and pic in the link is not the same as what is under the truck. the front half does come off but there are 12 bolts. the rear pumpkin has 12 bolts also. well if you have any other tips just let me know on here thanks.

 
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
03-31-09 10:36 PM - Post#1666012    
    In response to reborn 1968 chevy truck

Ok, I believe you have what you say, but I have no clue what it is. The rear pictured in the link I posted was used in all 3/4 and 1 ton Chevy trucks up to 72. Maybe if you post a pic of the rear in your truck, or a link to it, someone who is more knowledgeable than I am might be able to identify it. You can still count the ratio using the method I described in my earlier post.

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
04-01-09 11:02 AM - Post#1666291    
    In response to raycow

ok i have a pic of the back of it for the insurance company, i dont know if it will help at all.



 
Bad Bowtie 
Valued Contributor
Posts: 4535
Bad Bowtie
Age: 42
Loc: TX
Reg: 07-04-03
04-01-09 11:18 AM - Post#1666306    
    In response to reborn 1968 chevy truck

I'm lost as well!!

That would be a great rear axle ratio for the drag strip. The only thing missing would be the limit slip carrier...
GMC. We are Professional Grade.

http://www.cardomain.com/id/2004VHO


 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
04-03-09 09:44 AM - Post#1667927    
    In response to Bad Bowtie

ok here is a link for the pic for the rear end,

http://i137.photobucket.com/albums/q225/donaldduc k...

 
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
04-03-09 11:22 AM - Post#1667990    
    In response to reborn 1968 chevy truck

Please shoot another pic centered on the rear end so the entire cover is visible. Also, what is the series or model ID shown on your front fenders?

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
JimKshortstep4x4 
Chevytalk Moderator & "10th Year" Silver Supporting Member
Posts: 4559
JimKshortstep4x4
Loc: Muskegon, MI, USA
Reg: 03-28-02
04-04-09 01:51 AM - Post#1668448    
    In response to reborn 1968 chevy truck

Here is a link to an axle guide. Maybe you can compare yours to the pictures.

Jim

http://www.coloradok5.com/axleguide.shtml
Member 65-66 Full Size Chevrolet Club

65 Impala SS, 400sbc, Muncie M-22
66 Impala SS, 396, TH 400
69 El Camino, 350, TH 350
71 Short bed stepside 4x4, 350/TH 350
71 Snow plow, 4x4, 350, TH 350
72 GMC Shortbed, stepside, 427/TH 400


 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
04-05-09 11:57 AM - Post#1669356    
    In response to JimKshortstep4x4

ok guys its the dana 60 rear end. not sure what the model id is on the fenders, where would i look for that on the fender. well thanks for all the help. now i just need to find out the gear ratio in the rear end.

 
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
04-05-09 12:17 PM - Post#1669376    
    In response to reborn 1968 chevy truck

Ok, that makes it a lot easier. You won't need the truck model now. That's actually a GMC rear, not Chevy. They were used in Chevy trucks when you ordered leaf springs. Count the bolts again and I think you will find there are only 10.

You can still find out the gear ratio by counting it like I described above.

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
longhorn_man 
Very Senior Member
Posts: 1931

Age: 40
Loc: Columbus Ohio
Reg: 02-02-02
04-06-09 07:54 PM - Post#1670476    
    In response to raycow

there were plenty of dana rears in chevy trucks.... most big block 3/4 ton trucks got the dana, including my suburban.
1972 C/10 burb, 68 nose, SLAMMED... 402/TH400/3.07 <--- Chicks dig it!
1970 C/30 Longhorn, GMC nose...Caddy 425/TH350/4.10 one of 1404 built
www.longhorntrucks.freeservers.com


 
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
04-06-09 08:17 PM - Post#1670499    
    In response to longhorn_man

  • longhorn_man Said:
there were plenty of dana rears in chevy trucks.... most big block 3/4 ton trucks got the dana, including my suburban.


Leaf springs or coils?

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
04-06-09 09:42 PM - Post#1670550    
    In response to raycow

i have leaf springs. and i need to replace them both but dont want to spend a fortune doing it got any hints. and my truck is a 3/4 ton CAMPER SPECIAL..

 
longhorn_man 
Very Senior Member
Posts: 1931

Age: 40
Loc: Columbus Ohio
Reg: 02-02-02
04-07-09 03:35 AM - Post#1670632    
    In response to reborn 1968 chevy truck

Dana rears were in both leaf and coil rear end equipped Chevy trucks.
I have 2 out of big block 3/4 2 wheel drive ton leaf spring chevys in my garage, and just sold a dana big block 3/4 ton dana rear out from under my 2 wheel drive big block 72 suburban. (converted it to 1/2 ton)


I've been into these trucks for over 13 years now, and I have never heard anyone say that dana was a GMC rear. It was all but standard with a big block in a 3/4 ton truck, and would have 3.54 gears. There was no actual option number, but it pops up from time to time, however, again, the best way to locate one in these trucks, is to look under the back of a 3/4 ton big block truck... leaf Oor coil.
Danas have been found under inline 6, and small block trucks too, just very very uncommon.

  • Quote:
i have leaf springs. and i need to replace them both but dont want to spend a fortune doing it got any hints. and my truck is a 3/4 ton CAMPER SPECIAL.


First, you'll have to define fortune. A budget bolt on to one man, is another man's entire budget.
I wouold recomend starting your own thread, since this thread is about rear ends, and has nothing to do with springs.
New springs aren't cheap. That's all there is to it. You'll possibly need to have them made.
1972 C/10 burb, 68 nose, SLAMMED... 402/TH400/3.07 <--- Chicks dig it!
1970 C/30 Longhorn, GMC nose...Caddy 425/TH350/4.10 one of 1404 built
www.longhorntrucks.freeservers.com


Edited by longhorn_man on 04-07-09 03:37 AM. Reason for edit: No reason given.

 
reborn 1968 chevy truck 
Forum Newbie
Posts: 37
reborn 1968 chevy truck
Loc: Bakersfield,ca
Reg: 03-14-09
04-07-09 09:04 PM - Post#1671287    
    In response to longhorn_man

yea i found a spring guy that will make a set of springs for me for 90 bucks each. well thanks for all the advice now i know what else i need to do for my decision.

 
raycow 
Honored Member
Posts: 18239

Age: 71
Loc: San Francisco, CA
Reg: 11-26-02
04-08-09 02:07 PM - Post#1671695    
    In response to longhorn_man

  • longhorn_man Said:
Dana rears were in both leaf and coil rear end equipped Chevy trucks.


Ok, if you say the Dana rears came with coil springs I will take your word for it, but the only ones I have ever seen in Chevys had leaf springs. These rears drive parts store guys nuts too, until someone tells them to look at GMC.

Ray
Bacon is the gateway drug for vegetarians - Bridget Lancaster


 
longhorn_man 
Very Senior Member
Posts: 1931

Age: 40
Loc: Columbus Ohio
Reg: 02-02-02
04-09-09 01:29 PM - Post#1672397    
    In response to raycow

yep... I know where there's 4 of them right now. all 8 lug, dana, factory coil, and all with 3.54 gears.
NONE of them for sale either. The old geezer hords stuff for no reason.
1972 C/10 burb, 68 nose, SLAMMED... 402/TH400/3.07 <--- Chicks dig it!
1970 C/30 Longhorn, GMC nose...Caddy 425/TH350/4.10 one of 1404 built
www.longhorntrucks.freeservers.com


 
This Forum is Sponsored by
bobschevytrucks.com
Visit Impala Bob's forum on ChevyTalk
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

5592 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 1.266 seconds.   Total Queries: 13   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 08:08 AM
Top