mini tub diff width

[tubbed69]

hey Gav I am not real good on computers but I have a build thread on projects, just type in New Build,another 1969 camaro I dont know how to copy a link for you but check out the pics and I will help in anyway,I did anther recently for a friend and used same measurements and it worked fine on it too.

[Vince@Meanstreets]

Originally Posted by usa-69z

Ryan , i thought you would narrow the diff and then order rims to suit with the right backspace? also is that measurement from the diff flange to flange or wheel mounting pad ?
Im confused on how to go about this,, what comes first the chicken or the egg?

That would depend on your build. If you are building a rear end anyways, choose your wheel first with your dish preference and start fitting. It's best to measure your car because from experience no two cars are alike.

[Todd in vancouver]

Being new to the PT build I'm presume there are many ways to get the results each person is after. My understanding and the way I planned my build was to do the mini tub while I was replacing quarter panels, assemble an install my rear suspension set up, then measure and order the rim & tire combination to fill the big hole I just created. Is that not why I'm going to have to order a set of these super expensive PT type wheels I keep seeing on these builds?

[usa-69z]

Originally Posted by Vince@MSperfab

That would depend on your build. If you are building a rear end anyways, choose your wheel first with your dish preference and start fitting. It's best to measure your car because from experience no two cars are alike.

, so how do i work out my dish or backspace without a diff to measure from? Im after maximum dish i can run..with a 12 inch rim.

I had a measure of my diff today ,, its a tru trac moser ,, it has big drums,, did they use ford rear brakes on some of these? Im sure i saw a ford logo stamped into the backing plate somewhere when i purchased it? will that be a factor with getting rear discs or are the axle flanges the same stud pattern?
sorry i got a lot of questions here ,, i also thought narrowing each side 2.5 would bring the saddles very close to the axle flange..

Gav

[Vince@Meanstreets]

Originally Posted by usa-69z

, so how do i work out my dish or backspace without a diff to measure from? Im after maximum dish i can run..with a 12 inch rim.

I had a measure of my diff today ,, its a tru trac moser ,, it has big drums,, did they use ford rear brakes on some of these? Im sure i saw a ford logo stamped into the backing plate somewhere when i purchased it? will that be a factor with getting rear discs or are the axle flanges the same stud pattern?
sorry i got a lot of questions here ,, i also thought narrowing each side 2.5 would bring the saddles very close to the axle flange..

Gav

If you want to simplify things, have moser weld on Chevy housing ends on. Pn 7900 or 7900FM (flush mount). This will allow you to use your parking brake backing plate as a bearing retainer depending on the disc brakes you run. The 7900 uses a large press on ford style bearing so that eliminates the c clip. If you already have your rear end and need to narrow it, you can cut off the ends and replace with the 7900's. You can get your axles cut and resplined and change the bolt pattern to Chevy 5x 4 3/4.

[v8s only]

my 69 camaro has 55 inch rear end wheel mounting surface to wheel mounting surface that's 5 inches shorter then stock wheels are 18x12 5.5 back spacing fits perfect in my car

[usa-69z]

Vince , i do already have a chev pattern tru trac Moser rear,, but im thinkin i have ford big brakes as it got the torino bearings ? I just thought the flange pattern maybe different to a stock chev flange pattern, ill have to measure it..THe spring pad mount on the diff would be very close if i narrowed it to 55 inches.. do they end up being that close to the disc and bracketry?
Gav

Originally Posted by Vince@MSperfab

If you want to simplify things, have moser weld on Chevy housing ends on. Pn 7900 or 7900FM (flush mount). This will allow you to use your parking brake backing plate as a bearing retainer depending on the disc brakes you run. The 7900 uses a large press on ford style bearing so that eliminates the c clip. If you already have your rear end and need to narrow it, you can cut off the ends and replace with the 7900's. You can get your axles cut and resplined and change the bolt pattern to Chevy 5x 4 3/4.

[usa-69z]

Thanx Tony ,, that seems to be the average combo for the mini tub im finding..
Gav

Originally Posted by v8s only

my 69 camaro has 55 inch rear end wheel mounting surface to wheel mounting surface that's 5 inches shorter then stock wheels are 18x12 5.5 back spacing fits perfect in my car

[Vince@Meanstreets]

Originally Posted by usa-69z

Vince , i do already have a chev pattern tru trac Moser rear,, but im thinkin i have ford big brakes as it got the torino bearings ? I just thought the flange pattern maybe different to a stock chev flange pattern, ill have to measure it..THe spring pad mount on the diff would be very close if i narrowed it to 55 inches.. do they end up being that close to the disc and bracketry?
Gav

yes, you would have to move the leafs in too.

[Stovebolter]

Tony,

So a 1969 Camaro stock hub to hub is 60"? I was told the Z28 is 58"? Are they different for different X codes? Just asking.

Gav,

As Vince suggested, brakes also may play a role. I'll probably go with the stock width rear and stock dish making replacement a cinch. I'm going with Moser full floater (steel hubs) and PBRs on Willwood GT rotors. GMR makes the mounts for the PBRs and a sweet little parking prake optiion. At 58" as a standard width it will be easier to get a replacement if needed. I'm sure Moser can and will make any width but they have specific widths already in stock. And from what I see they have good prices. Are you dead set on keeping the 12 bolt? Just a thought.

David

David