How many RT4WDs actually have functioning RWD
MrWhoopee
Wagonist
Given that the viscous couplers don't last forever and are subject to accelerated degradation due to uneven tire wear/unequal tire size front to rear, I wonder how many RT4WDs on this list are actually working. The official test is performed by raising all four wheels off the ground, starting the engine, setting the emergency/parking brake, putting the trans in gear then letting the clutch out. If the engine dies, the VC is functioning properly, if not, then not. I currently have one that is working and one that isn't. How's yours?
Comments
2) you can rebuild your VC (search)
I am currently working on rebuilding my non-functioning VC. Even when it wasn't working properly, the rear wheels would rotate with the front if the brake wasn't set, but the engine wouldn't stall when performing the official test. The coupler was transmitting torque to the rear, but wouldn't achieve full lock-up. It wouldn't get me up my snow covered driveway while my other RT cruised right up with no problem.
you can replace the ujoints....i did all of mine a couple weeks ago.
here you go, problem solved.
viewtopic.php?f=7&t=7489&hilit=rockford+driveline
bowz
On this site floating around in the suspension and drivetrain is a write up on how to repair the VC.
And mine definitely works, as is apparent by the 4 tire marks left while pulling out of my shop the other day
Just finished rebuilding the VC in my '91. Put it up on the hoist, set the ebrake, started the engine, put it in gear, let the clutch out, the engine DIED instantly. Tried again with more revs, died again. Had a friend watch the front wheels, they barely moved. Now THAT'S how it is supposed to work!
Anyone needing PDMS (silicone fluid) to rebuild theirs, pm me. I had to buy a gallon and it wasn't cheap.
{knocking on wood}
btw, the VC can also act in reverse and give an anti-lock braking effect.
I suspect that the harshness of the environment is proportionally related to the lifespan of an RT Driveshaft. I keep my RT in the garage and drive it sunny weekends and the occasional camping trip
so... i think it is working.
then i pulled plugs for a look see. when i changed oil bout 1,000 miles ago i changed plugs and they were white! i mean dangerously white.. very lean, i think due to a vacuum leak. i changed 18' of stinkin vacuum line but didn't solve the erratic idle problem. i finally just got a pair of needle nose pliers and started pinching vacuum lines one by one till the idle finally changed. when i pinched #26 (according to vacuum diagram) idle dropped to a smooth and consistant idle. i don't know what that vacuum line does.. but everything seems to still be working fine. anyway the plug looked really good..
oh.. guess i should include a pic of the beast... it's an 87.
oh, another thing.. i don't know what the original tire size is. but according to my calculator this thing has been getting round 35mpg with a best of 37.2! can't really believe that is accurate..
this is my tire size..
so what is the correct size?
yet to do the gravel road test