Rear axle friction / rolling resistance?

[Andi]

Ever since I got my TA it always seemed like it has more rolling resistance than I'm used to, like the e-brake is dragging or something. At stoplights I rarely have to hold the brake because unless it's a significant grade, the car doesn't really start rolling on its own.

I put it up in the air today and checked, the fronts are easy to rotate but the rears are harder. The resistance seems to be from the axles/diff rather than the e-brake sricking, because you can turn the rear wheels a couple degrees before the axle play ends, then it's really difficult.

Is this normal and just a consequence of the heavy duty rear end these cars have?

Here's a video of how quickly the rear wheels slow down from 27mph (in the air), when I push in the clutch and let them slow down on their own. It only takes about four seconds:

https://youtu.be/Rp6l5CyN7fU

Thanks in advance for y'all's advice.

Cheers,
Andi

[Dfunk]

Has the diff fluid been changed? The wrong fluid could cause problems.

[Andi]

Woodhouse changed all the fluids before I bought it.

[Andi]

It's possible this is normal and the easy rolling I'm used to from vettes and other "normal" cars just doesn't translate to vipers. That's what I'm hoping to find out by posting this..

[Andi]

In case it is the e-brake.. how does one adjust the e-brake?

[fuggles]

I noticed a similar feeling in my gen 4. My guess is the resistance is due to the visco lok differential. There is nothing wrong with my car. Fresh fluids, new bearings, runs like a beast etc.

[ViperSmith]

if you are driving and put the clutch in does it slow dramatically?

[Andi]

if you are driving and put the clutch in does it slow dramatically?



No. It's not a lot of friction. Just more than I'm used to; mainly only noticeable at stoplights.. Where my old Z06 may have started rolling on its own from a very slight incline, the viper doesn't.. it requires a bigger incline to do so.

I'm starting to think this is due to the e-brake inner pad dragging "quirk" I read about in the gen 4 forum.

[Jack B]

What tires


No. It's not a lot of friction. Just more than I'm used to; mainly only noticeable at stoplights.. Where my old Z06 may have started rolling on its own from a very slight incline, the viper doesn't.. it requires a bigger incline to do so.

I'm starting to think this is due to the e-brake inner pad dragging "quirk" I read about in the gen 4 forum.

[Andi]

What tires

Corsa... But it shouldn't matter when the car is in the air and the friction is still higher.. Lol

[Jack B]

What tires

At a standstill, the corsa's are soft and deflect more, sort of causing a temp flat spot, although minor, just trying to get you an answer.

You cannot expect the wheel to rotate freely on a lift, there has to be some resistance to movement . Just look at the mass you are trying to rotate. I have had my G5 and G2 on the lift dozens of times where I had to rotate the rear wheels to remove the drive shaft, I could not feel a diff.

[cashcorn]

turn off the hill brake. good luck.

[Andi]

turn off the hill brake. good luck.

Umm... it is off....

[donk_316]

Umm... it is off....

Not the emergency brake, the hill assist start anti roll back whatever the hell its called.

[Dfunk]

Not the emergency brake, the hill assist start anti roll back whatever the hell its called.

Interesting. I've nearly stalled mine several times from the engagement point of the clutch changing while taking off on an incline. I've never heard of hill assist and now wonder if that's what I'm experiencing.

[kverges]

I just got through with track setup and my car rolls fine as I pushed it to and fro doing ride height etc.

[Jack B]

Hill assist applies the brakes if you roll backwards, it does not impede forward motion.

The reason you stall is the alum flywheel and the 2.2X first gear.


Interesting. I've nearly stalled mine several times from the engagement point of the clutch changing while taking off on an incline. I've never heard of hill assist and now wonder if that's what I'm experiencing.