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Old 01-05-2018, 03:50 PM   #1
Joe M 2012 2SS


 
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One tire spinning more than the other when doing burnouts L99

An acquaintance of mine told me several months back, when I was at my local drag strip, that my passenger side wheel was spinning more than the driver's side during burnouts.

My car has no problems hooking at the strip (18" MT ET Street R), so I didn't think much more of it.

The 20" Nitto 555R's that have been on my car for about a year show the evidence of this bias to one side spinning more, as the passenger side is almost completely worn out, while the driver's side has some life left in it.

I will be having a 3.91 gear put in at some point in 2018, and was also considering an Eaton tru-trac as well.

Any other options besides a tru-trac for the L99 to even out spinning while doing a burnout?
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Old 01-05-2018, 08:47 PM   #2
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when i installed my 3.91's all I did was add the ford s-spring...the clutch's looked fine..they sell clutch kits on ebay for like $110 or so....tru-trac IMHO is for road course..and I know I am hittin the tires hard and even cause I marked the tires/rims and they both moved evenly...cheaper option and I also replaced all the bearings due to mileage...all I want now is a LPW cover and diff bushing upgrade..was lot's of fun doin the work on the garage floor...and still whisper quiet after several k drivin...the car luv's this cold air!
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Old 01-08-2018, 11:03 AM   #3
WoodBoss
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Get a line lock so the rear brakes don't drag.
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Old 01-08-2018, 06:51 PM   #4
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Quote:
Originally Posted by frankwjr View Post
when i installed my 3.91's all I did was add the ford s-spring...the clutch's looked fine..they sell clutch kits on ebay for like $110 or so....tru-trac IMHO is for road course..and I know I am hittin the tires hard and even cause I marked the tires/rims and they both moved evenly...cheaper option and I also replaced all the bearings due to mileage...all I want now is a LPW cover and diff bushing upgrade..was lot's of fun doin the work on the garage floor...and still whisper quiet after several k drivin...the car luv's this cold air!
Can i get more info on the ford s spring mod? Everytime i search this i seem to come up with lots of threads that youve posted in becuse its in your signature. I am interested in trying it.
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Old 01-09-2018, 09:00 AM   #5
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Originally Posted by frankwjr View Post
tru-trac IMHO is for road course..
I went with the TrueTrac after I broke my stock spider gears.
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Old 01-09-2018, 09:13 AM   #6
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Originally Posted by Blakester View Post
Can i get more info on the ford s spring mod? Everytime i search this i seem to come up with lots of threads that youve posted in becuse its in your signature. I am interested in trying it.
all I did was use Jannety's(you can d/l a .pdf from his website) and another websites info..decided not to replace the clutches like they do, just got the spring and did the grind/polish on the face of the pinion/spiders..

this keeps the clutch pack energized a bit more but does not cause the tire hoppin when going around corners..works awesome but does take a bit more care when drivin if the roads are slick or wet...I can "wag" the tail when going around corners without even thinkin about it..and every time I put my foot in it they both break free nice and even..every time.
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Old 01-09-2018, 11:07 AM   #7
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I'd say if someone is drag racing a lot, I'd get the TrueTrac. I broke my stock spider gears once I started to 60 in the 1.50 range.
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13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 01-10-2018, 05:08 PM   #8
Joe M 2012 2SS


 
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Quote:
Originally Posted by WoodBoss View Post
Get a line lock so the rear brakes don't drag.
This is a good investment Frank. I replaced rear pads last spring, they are 1/2 worn now. Which one are you using?

Quote:
Originally Posted by Pro Stock John View Post
I'd say if someone is drag racing a lot, I'd get the TrueTrac. I broke my stock spider gears once I started to 60 in the 1.50 range.
I'm definitely going with the TrueTrac, I was planning a gear swap anyway. I am not near 1.5X yet, 1.7X right now......with mods planned, by fall I should be there.

My biggest concern is after installation of the TrueTrac/gear, will my converter still allow me to be able to sit on the line like the stock differential does, with no brake pedal needed?

My car launches best when I can flash from the line, gas only, as it does now.
This also makes launching the car incredibly easy.

I like easy!

If I understand correctly, a gear swap will allow the car to move easier, and actually lower the stall of the converter.
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