Needing some crossmember advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Voodooracer · 06-07-2006, 10:06 PM

Bought a 67 Step and it is lowered, don't know how far but I am ASSuming around 5-6 in the rear. My question is what does the pinion angle need to be now. Also my stock crossmember has grooved my driveshaft. Do I need to purchase the drop crossmember or change the pinion angle. All opinions are appreciated. Also the headers are the right part # but they are touching the A arm pivot point. Any suggestions? Thanx.

Voodooracer · 06-13-2006, 08:22 AM

So, is this a dumb question or nobody wants to help? New to these trucks and was looking for some guidance.

JAMESCHURCH13 · 06-13-2006, 08:38 AM

Quote:

Originally Posted by Voodooracer

So, is this a dumb question or nobody wants to help? New to these trucks and was looking for some guidance.

I think it's a good question. I just dont know a good answer outside of groves in drive shaft ='s bad and dont pinion angles mess up the inside of your tranny with the extra strain. I say fab your cross member a little and reinforce it. You know like put a kind of c notch in it.

maybe? Peace

clif1968 · 06-13-2006, 08:54 AM

Here's some info on pinion angles, http://www.2quicknovas.com/happypinions.html

Inthuwind · 06-13-2006, 10:22 AM

Got any pics??? Would like to see your truck and some of the problem areas.

68 short step · 06-13-2006, 12:39 PM

pinion angle needs to be = to the output shaft of the tranny , but opposite.... Ie -3 and +3

Voodooracer · 06-14-2006, 08:21 AM

Thanx for the link. This will help out. Iwill post some pics of the driveshaft so maybe you can actually see what I'm talking about.

06-07-2006, 10:06 PM	#1
Voodooracer Registered User Join Date: Feb 2006 Location: Houston, Texas Posts: 32	Needing some crossmember advice Bought a 67 Step and it is lowered, don't know how far but I am ASSuming around 5-6 in the rear. My question is what does the pinion angle need to be now. Also my stock crossmember has grooved my driveshaft. Do I need to purchase the drop crossmember or change the pinion angle. All opinions are appreciated. Also the headers are the right part # but they are touching the A arm pivot point. Any suggestions? Thanx.

06-13-2006, 08:22 AM	#2
Voodooracer Registered User Join Date: Feb 2006 Location: Houston, Texas Posts: 32	Re: Needing some crossmember advice So, is this a dumb question or nobody wants to help? New to these trucks and was looking for some guidance.

06-13-2006, 08:54 AM	#4
clif1968 Junior Member Join Date: Apr 2006 Location: Eufaula, OK Posts: 103	Re: Needing some crossmember advice Here's some info on pinion angles, http://www.2quicknovas.com/happypinions.html __________________ Clif '68 C/10 LWB, 327, TH400, 12 bolt

06-13-2006, 10:22 AM	#5
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: Needing some crossmember advice Got any pics??? Would like to see your truck and some of the problem areas. __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

06-13-2006, 12:39 PM	#6
68 short step Senior Member Join Date: Aug 2005 Location: tulsa OK Posts: 3,070	Re: Needing some crossmember advice pinion angle needs to be = to the output shaft of the tranny , but opposite.... Ie -3 and +3

06-14-2006, 08:21 AM	#7
Voodooracer Registered User Join Date: Feb 2006 Location: Houston, Texas Posts: 32	Re: Needing some crossmember advice Thanx for the link. This will help out. Iwill post some pics of the driveshaft so maybe you can actually see what I'm talking about.

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