Pic of my SAS, but another question a/b driveshaft length

fordmgt1 · 05-17-2009, 07:47 AM

I appreciate all of the help, so here's a pic of what I have completed so far. I did have a question a/b the rear driveshaft, I am putting on a Trail Gear 5" rear lift, but I am also putting on a t-case doubler. I want to run my stock rear u-joint style driveshaft (let me know if you think this is a problem), but I need to determine the angle. I know the tcase and third member need to be at the same angle, but I want to put my drive shaft in and drive my truck to another shop (to flex it on a fork lift) before I put the doubler in. What angle should I put the third without the doubler now so as not to have vibrations when the rear shaft gets shortened 6.5" for the doubler? Thanks for the help!

This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!

cubuff4runner · 05-17-2009, 09:33 AM

Why don't you just measure back the 6.5" + the 2" or so for the ujoint from the center of the transfer case flange. There is the point your pinion should be pointing at.

**waskillywabbit** · 05-17-2009, 09:43 AM

Just don't over rotate the rear axle or you will have worse problems.

If you are doing things all at once now, install your dual cases FIRST, then the rear lift and point the rear pinion at the actual spot.

Your tcase and your 3rd member at the same angle?

Run a double cardan on the rear d-shaft and you will thank yourself later.

fordmgt1 · 05-17-2009, 10:13 AM

[quote=waskillywabbit;51142024]
Your tcase and your 3rd member at the same angle?

QUOTE]

I was trying to get away with running u-joints, and I think its right for the angle on the tcase and third member to be in parallel planes. Now, if you think there will be problems, I have a spare front drive shaft with a double cardan that I could take to a drive shaft shop and have then weld and balance it I suppose. I just trying to save money without cutting corners if thats possible. I didn't know if the length would be short enough to warrant a double cardan on the rear.

TOYOTA 1 · 05-17-2009, 12:11 PM

i have a 5" allpro lift in the rear, stock pinion angles and d-shaft lengths ( with no cardan joint) work perfect (no vibration). the rear 3rd flange and the tcase flange are @ the same angle. if you just want to drive it before a doubler kit, the stock setup(d-shaft/pinion angle with a 5" lift works great.

not sure about the no cardan joint with the duals though.

4xJedi · 05-27-2009, 03:08 AM

I'm running TG 5" rears. I pointed the pinion at the tcase, welded my perches on and called it good. I later installed duals, shortened my shaft and it doesn't drive any different than before. No problems at all. I have a CV for the rear but never installed it, it's fine.

05-17-2009, 09:33 AM	#2 (permalink)
cubuff4runner Registered User Join Date: Oct 2003 Location: Thornton, Colorado Posts: 1,023	Why don't you just measure back the 6.5" + the 2" or so for the ujoint from the center of the transfer case flange. There is the point your pinion should be pointing at. __________________ 96' 4Runner SAS - 87 Waggy 44 Aussie Locker & Alloy Shafts, 63" Chevy Rear Leaf Conversion, Inchworm Dual Crawler, PSC Hydro Assist, FROR Full Floater Rockfrogs Pics

05-17-2009, 09:43 AM	#3 (permalink)
waskillywabbit Super Moderator-Sponsoring Member Staff Join Date: Jul 2003 Location: Tuscaloosa, AL Posts: 14,548	Just don't over rotate the rear axle or you will have worse problems. If you are doing things all at once now, install your dual cases FIRST, then the rear lift and point the rear pinion at the actual spot. Your tcase and your 3rd member at the same angle? Run a double cardan on the rear d-shaft and you will thank yourself later. __________________ WabFab Off-Road, LLC MySpace Twitter Facebook 7th Annual South East 4Runner Jamboree, 2010 The toughest part of a Jeep is the chick driving it. WabFab Off-Road 4th Anniversary Sale Last edited by waskillywabbit; 05-17-2009 at 09:44 AM.

05-27-2009, 03:08 AM	#6 (permalink)
4xJedi Registered User Join Date: Sep 2002 Location: Charles Town, WV Posts: 227	I'm running TG 5" rears. I pointed the pinion at the tcase, welded my perches on and called it good. I later installed duals, shortened my shaft and it doesn't drive any different than before. No problems at all. I have a CV for the rear but never installed it, it's fine. __________________ '86 Runner, 4"SAS, 5.29's, 30 spline Longs, locked frt/rr, dual cases w/4.7's, Twinstick, LCE header, K&N, Engnbldr cam, Can-Back, Armor by me.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Driveshaft Length Question...Urgent!	881stGenRunner	86-95 Trucks & 4Runners	5	06-11-2008 10:25 AM
Driveshaft Length	toyguy86	84-85 Trucks & 4Runners	4	06-27-2007 11:32 PM
Driveshaft Length	toyguy86	86-95 Trucks & 4Runners	2	06-26-2007 03:10 PM
Driveshaft Length? 96 Taco	MudMonkey	95.5-2004 Tacomas & 96-2002 4Runners	11	06-26-2006 04:06 AM
driveshaft length	straightaxle85	95.5-2004 Tacomas & 96-2002 4Runners	2	10-02-2005 10:44 PM

05-17-2009, 10:13 AM	#4 (permalink)
fordmgt1 Registered User Join Date: Nov 2008 Location: Charlotte, NC Posts: 57	[quote=waskillywabbit;51142024] Your tcase and your 3rd member at the same angle? QUOTE] I was trying to get away with running u-joints, and I think its right for the angle on the tcase and third member to be in parallel planes. Now, if you think there will be problems, I have a spare front drive shaft with a double cardan that I could take to a drive shaft shop and have then weld and balance it I suppose. I just trying to save money without cutting corners if thats possible. I didn't know if the length would be short enough to warrant a double cardan on the rear.