RUSTY50F1
@$$Fault Junkie
I need to order the rear cross member for my JAG IRS but they need to know what the angle is 0, 4, 6, how do I know what to order. RUSTY
rear pinion angle "help"
- Thread starter RUSTY50F1
- Start date
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gassersgarage
The California Kid
If it's the pinion angle, it should be the same as your trans. They should run parallel. However, I used my chevy for street/strip so the pinion was 2 degrees down for better traction.
RUSTY50F1
@$$Fault Junkie
I don't have the engine and tranny on the frame yet. So what do I do.
Gastrick
One of the Dirty Dozen!
RUSTY, Could you give some more specifics. Does the supplier O,4, or 6 degrees up? Is your engine and transmission already fixed into position in your chassis? This will determine the angle at which your rear should be set. Just as an example, if your engine has a 4 degree down angle toward the rear, your differential should have a 4 degree up angle toward the front.
Gastrick
One of the Dirty Dozen!
RUSTY, if it were me, I would set the engine in the chassis in order to determine if I could comfortably live with a matching angle that the rear supplier offers, then I would order the rear accordingly.
Gastrick
One of the Dirty Dozen!
RUSTY, you want to end up with something like this. The engine/trans should be parallel to the rear, no matter what the angles.
Gastrick
One of the Dirty Dozen!
Oh, and happy birthday 
RUSTY50F1
@$$Fault Junkie
I don't have the motor mounts installed yet to mount the engine. So I can't mock it up. I just wanted to order the cross member while they were on sale for $180 bucks to save some money. ............... Oh thanks for the B-day wishes. 55 today going on 25 at heart. .........RUSTY
satanherself
Our favorite Sweetheart!
Could'nt he just get it ,,then install those angle wedges like they do on 4x4 when they jack em up?
or on IRS rear,,is'nt there a turnbuckle thingy to adjust the angle?
or on IRS rear,,is'nt there a turnbuckle thingy to adjust the angle?
Last edited:
gassersgarage
The California Kid
I would play it safe and get "0". Then you can match the trans output to your rearend.
Gastrick
One of the Dirty Dozen!
It doesn't install like a conventional rear, but I would still think that you could find a way to modify the mounting system to suit your needs.
RUSTY50F1
@$$Fault Junkie
The cross member is 3 1/2 by 3 1/2 sq. tubing with a plate welded in the center with 4 bolt holes to bolt the chunk to. It has to be cut to fit between the boxed frame. .........Rusty
satanherself
Our favorite Sweetheart!
Thats it ??,,ca'nt you fabricate something like that yerself??,,Then that way it will be just what ya need
LordMaximo
We call him King Maximo!
Actually all, 2* up angle is a very praticle setting.
It does allow for a more stable balance on the shaft and at 2*, the difference from the road conditions will not effect much of the ride.
It really depends on what you are using for an engine, HP ratio transfer to the tires, and if this is going to be an all out racer or just a street runner.
So, if it is going tobe a regular street runner and not any heavy drag racing in the future, 2* is a safe built in angle.
Plus is this ride a ground hugger?
Being a serious low boy having a minimal off-set from the engine setup to the actual height of the differential yoke. Truck or car, tall tires on the rear and shorties on the front. The total height difference from the trans yoke to the rear yoke is the governing pitch angle for the setup. If the front is standard height, being no Z in the front setup, and a heavy Z on the rear, will actually lower the distance of height to the pitch angle. The closer the parrallel of yokes, the less angle required.
I hope this has beed informative to your question.
Maximo
It does allow for a more stable balance on the shaft and at 2*, the difference from the road conditions will not effect much of the ride.
It really depends on what you are using for an engine, HP ratio transfer to the tires, and if this is going to be an all out racer or just a street runner.
So, if it is going tobe a regular street runner and not any heavy drag racing in the future, 2* is a safe built in angle.
Plus is this ride a ground hugger?
Being a serious low boy having a minimal off-set from the engine setup to the actual height of the differential yoke. Truck or car, tall tires on the rear and shorties on the front. The total height difference from the trans yoke to the rear yoke is the governing pitch angle for the setup. If the front is standard height, being no Z in the front setup, and a heavy Z on the rear, will actually lower the distance of height to the pitch angle. The closer the parrallel of yokes, the less angle required.
I hope this has beed informative to your question.
Maximo
RUSTY50F1
@$$Fault Junkie
Ill try to post a pic of the cross member.
RUSTY50F1
@$$Fault Junkie
Well so much for that.
Bonehead
Skull Master
If you have a program on your computer that holds pictures, or stores pictures, there is probably a way to re- size them, shrink those bad boyz down, and post them as a thumbnails.
RUSTY50F1
@$$Fault Junkie
Thanks I'll try that. ..........RUSTY
