Jeep QuadraTrac help

doktorew · 05-06-2015, 01:44 PM

Hey all, new to the 4x4 world and hoping that someone local might be able to help me with my recently acquired 1978 Jeep Cherokee.

When I bought the Jeep, it came with the front drive shaft disconnected. I didn't think much of it at the time, but I've come to learn that is a bad thing for the QuadraTrac system.

I actually had it flat-bedded home, but I drove it for probably about 2 miles after I had a new brake master cylinder and exhaust installed. It eventually lost drive, and I had it towed back home. My understanding is that no front drive shaft will make it behave that way.

I'm not sure if the transfer case is toast at this point, but I'd like to at least hook up the QuadraTrac vacuum hoses to see if it will still run in Emergency Mode (from what I've read you can run without a front drive shaft in E-Mode without issue) and possibly install the front drive shaft to see if the 4WD works at all. I consider myself somewhat handy, but I think I might be in over my head trying to get this sorted. Does anyone know a shop well versed in older FSJs? I'd also be open to any forum members that might want to lend a helping hand, I have an excellent beer repayment system.

Any help on the matter would be greatly appreciated.

Thanks,
Drew

itbrokeagain · 05-06-2015, 03:07 PM

What part of town are you in?

doktorew · 05-06-2015, 03:26 PM

Quote:

Originally Posted by itbrokeagain

What part of town are you in?

I'm in Oakley

itbrokeagain · 05-06-2015, 03:29 PM

Call 875 3327. Talk to Terry

jeepmanjeff · 05-13-2015, 09:33 AM

Quadratrac is primarily a front wheel drive system with rear wheel drive assist via a chain and clutches inside the transfer case. I doubt the transfer case is damaged, although this may be possible. I would install the front drive shaft and run it. Changing the fluid with an additive is also a good recommendation.

The transfer case is simple to tear down and fix - much simpler than a gear drive in my opinion.

The most common thing with it is chain stretch.

05-06-2015, 01:44 PM	#1
doktorew Join Date: May 2015 Posts: 2	Jeep QuadraTrac help Hey all, new to the 4x4 world and hoping that someone local might be able to help me with my recently acquired 1978 Jeep Cherokee. When I bought the Jeep, it came with the front drive shaft disconnected. I didn't think much of it at the time, but I've come to learn that is a bad thing for the QuadraTrac system. I actually had it flat-bedded home, but I drove it for probably about 2 miles after I had a new brake master cylinder and exhaust installed. It eventually lost drive, and I had it towed back home. My understanding is that no front drive shaft will make it behave that way. I'm not sure if the transfer case is toast at this point, but I'd like to at least hook up the QuadraTrac vacuum hoses to see if it will still run in Emergency Mode (from what I've read you can run without a front drive shaft in E-Mode without issue) and possibly install the front drive shaft to see if the 4WD works at all. I consider myself somewhat handy, but I think I might be in over my head trying to get this sorted. Does anyone know a shop well versed in older FSJs? I'd also be open to any forum members that might want to lend a helping hand, I have an excellent beer repayment system. Any help on the matter would be greatly appreciated. Thanks, Drew

05-06-2015, 03:07 PM	#2
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	What part of town are you in? __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

05-06-2015, 03:29 PM	#4
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	Call 875 3327. Talk to Terry __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

05-13-2015, 09:33 AM	#5
jeepmanjeff Ah Unz ze President! - CORE Member - - Moderator - Join Date: Jan 2007 Location: Fairfield Ohio Posts: 588 Images: 343	Quadratrac Quadratrac is primarily a front wheel drive system with rear wheel drive assist via a chain and clutches inside the transfer case. I doubt the transfer case is damaged, although this may be possible. I would install the front drive shaft and run it. Changing the fluid with an additive is also a good recommendation. The transfer case is simple to tear down and fix - much simpler than a gear drive in my opinion. The most common thing with it is chain stretch. __________________ Keep them on all 4's