Rear end pulls right on launch. Normal?

Bill220 · Feb 21, 2017

With the extra power the blower makes, the rear end always pulls/slides to the right when I accelerate hard. Is this normal? Why not to to the left, or straight, for that matter. Stock rear end, 3.73 gears, Stallion racing LCA's & PHB and BMR relocation brackets, 2nd hole. Car has never been beat on, 45,000 miles.

46addict · Feb 21, 2017

Are both of the LCA bolts torqued properly?
If the car is lowered is the rear axle centered?

Bill220 · Feb 21, 2017

46addict said:
Are both of the LCA bolts torqued properly?
If the car is lowered is the rear axle centered?

Yes and yes. I double checked everything when I put the relocation brackets on last month. It's lowered 1.2 inches if it matters. I have Steeda Sport springs and Koni STR/T shocks & struts.

BMR Tech 2 · Feb 21, 2017

Do you have the axle damper bolts in the relocation brackets?

Sky Render · Feb 21, 2017

Install an Eaton TrueTrac and report back.

Boaisy · Feb 21, 2017

Sky Render said:
Install an Eaton TrueTrac and report back.

This, with all else in the rear being center.

Bill220 · Feb 21, 2017

BMR Tech 2 said:
Do you have the axle damper bolts in the relocation brackets?

Yes sir.

Bill220 · Feb 21, 2017

Sky Render said:
Install an Eaton TrueTrac and report back.

Can't afford it right now. I'm not working. Good idea though!

Bill220 · Feb 21, 2017

I just want to know what's causing it and if there's something wrong with my current setup and if it's that's just what it does. As in, it's normal.

BMR Tech 2 · Feb 21, 2017

Go back through and make sure all the bolts are installed and torqued on the LCA brackets. I would also check the LCA bushings and make sure they're all in good shape.

Does it only happen when you're getting on the car? Does the rear end shift or step out when you let off the gas? Can you measure the wheel base on both sides for me?

Bill220 · Feb 21, 2017

BMR Tech 2 said:
Go back through and make sure all the bolts are installed and torqued on the LCA brackets. I would also check the LCA bushings and make sure they're all in good shape.

Does it only happen when you're getting on the car? Does the rear end shift or step out when you let off the gas? Can you measure the wheel base on both sides for me?

I have to lift the car and will retorque everything. It only happens when I mash the peddle in second gear (haven't tried 3rd yet). When I let off it goes right back to center. The wheel base is perfect. I measured it and had a mechanic double check my work.
Sometimes when the tires break loose (spinning) it tracks straight. Odd

Sky Render · Feb 21, 2017

Methinks your stock TracLock diff is worn out...

Bill220 · Feb 21, 2017

How could it be? I NEVER beat on the car. Not once. I will take your suggestion though. It's just gonna have to wait. My Mustang fund is decimated and I'm working two part time jobs just to keep up.

travelers · Feb 21, 2017

You don't necessary have to beat on it for the TL to act up. The clutches slip every time you make a turn. With that many miles they probable could use a refresh. Or better yet the Eaton True Track. It also might be the LCA bushing starting to go. I know with my car which only has 18K it goes straight as an arrow with the TL. I now have a Eaton True Track with new 3.73 gears that are just heat cycled so this weekend with the nice weather I'll jump on it to see how it goes..

Bill220 · Feb 21, 2017

travelers said:
You don't necessary have to beat on it for the TL to act up. The clutches slip every time you make a turn. With that many miles they probable could use a refresh. Or better yet the Eaton True Track. It also might be the LCA bushing starting to go. I know with my car which only has 18K it goes straight as an arrow with the TL. I now have a Eaton True Track with new 3.73 gears that are just heat cycled so this weekend with the nice weather I'll jump on it to see how it goes..

Thank you! Let me know what it does. I do not want to replace that upper bushing lol.

RocketcarX · Feb 21, 2017

If it's spinning the tires it will step out. You sure you're not just blowing the tires off?

RED09GT · Feb 22, 2017

My car started to go to the right at the track, turns out my differential side upper control arm bushing was torn. Replaced it with the spherical bearing style from steeda. It feels much better now.
Check it as it could be the problem.

Sky Render · Feb 22, 2017

Bill220 said:
How could it be? I NEVER beat on the car. Not once. I will take your suggestion though. It's just gonna have to wait. My Mustang fund is decimated and I'm working two part time jobs just to keep up.

Clutch diffs wear out. The clutches in them are friction material, similar to a transmission clutch. They're wear items.

Unfortunately, the stock clutch diff is not known for longevity. The advantage is that it's cheap at like $300. Or you can spend a little more and get an Eaton.

Bill220 · Feb 22, 2017

RocketcarX said:
If it's spinning the tires it will step out. You sure you're not just blowing the tires off?

That's what's happening. And it doesn't do it all the time. I'm going to re check the torque on all bolts etc, inspect my bushings and try to learn how to drive this thing lol.

RocketcarX · Feb 22, 2017

How old/what are the tires you're running?

Rear end pulls right on launch. Normal?

forum member

13726548

forum member

Kelly's Replacement Lackey

Stig's Retarded Cousin

Dark Knight

forum member

forum member

forum member

Kelly's Replacement Lackey

forum member

Stig's Retarded Cousin

forum member

Senior Member

forum member

95% of my weight is fuel

Equal Opportunity Offender

Stig's Retarded Cousin

forum member

95% of my weight is fuel

Similar threads

Support us!

Sponsor Links