Rear End and Gear Questions for Track and DD

[sheizasosay]

So it broke when the car hooked up. When you send that back to wavetrac for replacement, do you think they will let you know what happened with it or just give you another and they keep their observations to themselves?

For me personally, I won't buy a wavetrac until they been out there for a minute. Let the kinks get worked out and engineering can make their adjustments.

The rear they put in the Trak Pak Roush is not that expensive as far as prices go and I haven't heard anything bad yet. I've heard preference to the Torsen T2R, but really the detroit trutrac sounds like the "people's champ" for road course duty.

Caveat-I know race shit breaks, but some more than others.

 

[19COBRA93]

So it broke when the car hooked up. When you send that back to wavetrac for replacement, do you think they will let you know what happened with it or just give you another and they keep their observations to themselves?

For me personally, I won't buy a wavetrac until they been out there for a minute. Let the kinks get worked out and engineering can make their adjustments.

The rear they put in the Trak Pak Roush is not that expensive as far as prices go and I haven't heard anything bad yet. I've heard preference to the Torsen T2R, but really the detroit trutrac sounds like the "people's champ" for road course duty.

Caveat-I know race shit breaks, but some more than others.

It broke on the shift to 3rd. It hooked up about halfway through 2nd without a problem. When we had the problems before, they were pretty open with us and discussed the problem and what they had done to correct it. I expect the same sort of communication this time as well. Also, the last time we had problems they offered up a trade for a different unit, like a trutrack, but the owner declined. I think this time if it's offered, he'll do it. I'm pretty sure we're not putting a Wavetrac back in this car, regardless of the outcome of this.

It's like having a super hot girlfriend, but every time you have sex with her, she cries for 3 hours after, calls you a pathetic loser, and psycho attacks your Facebook page. No matter what she promises you of not doing it again, you know the potential is there, and it's just not worth going through that again. That's how I feel, and it's not even my car.

 

[sheizasosay]

every time you have sex with her, she cries for 3 hours after, calls you a pathetic loser, and psycho attacks your Facebook page. No matter what she promises you of not doing it again, you know the potential is there, and it's just not worth going through that again. That's how I feel, and it's not even my car.

Are you talking about psycho girls or normal? Because I think that is normal....maybe the "new normal".

On a serious note...that's pretty damn stand-up customer service. I'll give them that for sure.

 

[19COBRA93]

Are you talking about psycho girls or normal? Because I think that is normal....maybe the "new normal".

On a serious note...that's pretty damn stand-up customer service. I'll give them that for sure.

As I typed that I thought to myself it wasn't psycho enough, as it could be considered normal behavior for some.

There's no question the guys at Wavetrac have been extremely helpful through this whole ordeal.

 

[sheizasosay]

As I typed that I thought to myself it wasn't psycho enough, as it could be considered normal behavior for some.

LOL!

 

[Whiskey11]

What is fascinating to me is this problem seems specific to the 8.8 units and not others. There are still gobs of people who recommend them that drive BMWs and Porsches and even cars with 9" units in them but the 8.8, arguably one of the most common differentials on the road is a friggen house of cards and self destructs when pushed... Time to put the engineering hat on and figure out why that is since Im sure that BMW and Porshe use smaller diffs than Ford does...

It seems like the only gear diff that seems to hold up is the TruTrac and thats interesting in and of itself. It makes deciding what rear diff I want an effort in frustrasion since I labor over these decisions so long... I think I will have the stocker rebuilt and run that for another season before deciding...

 

[Surfergeek]

It's like having a super hot girlfriend, but every time you have sex with her, she cries for 3 hours after, calls you a pathetic loser, and psycho attacks your Facebook page. No matter what she promises you of not doing it again, you know the potential is there, and it's just not worth going through that again. That's how I feel, and it's not even my car.

Ha Ha! That certainly paints a vivid picture of the situation.

 

[sheizasosay]

It seems like the only gear diff that seems to hold up is the TruTrac

I don't think Ford would have chosen Torsen to go into the Boss if they thought they were gonna have serious problems.

 

[steveespo]

What is fascinating to me is this problem seems specific to the 8.8 units and not others. There are still gobs of people who recommend them that drive BMWs and Porsches and even cars with 9" units in them but the 8.8, arguably one of the most common differentials on the road is a friggen house of cards and self destructs when pushed... Time to put the engineering hat on and figure out why that is since Im sure that BMW and Porshe use smaller diffs than Ford does...

It seems like the only gear diff that seems to hold up is the TruTrac and thats interesting in and of itself. It makes deciding what rear diff I want an effort in frustrasion since I labor over these decisions so long... I think I will have the stocker rebuilt and run that for another season before deciding...

Whiskey
Do the BMWs and Porsches put 590 lb/ft through their differentials? Maybe on a few but not most.
Steve

 

[Whiskey11]

Whiskey
Do the BMWs and Porsches put 590 lb/ft through their differentials? Maybe on a few but not most.
Steve

No most do not but their differentials are physically smaller and should have less torque holding strength. Wavetrac claims their diffs are good to some pretty high HP numbers and torque numbers and it is apparent that there is something different from the smaller BMW and Porsche diffs to the 8.8 units that is causing these failures.

As for SVT feeling the Torsen is up to the task... right because neither SVT nor Ford Racing have ever put parts in cars that were prone to failure or problems... Do I need to have Sam come in here and reiterate how many units he has seen fail?

 

[sheizasosay]

Do I need to have Sam come in here and reiterate how many units he has seen fail?

Yeah that's fine. You can call Sam in or just put the info out and that would be fine too. I don't work for Torsen. I'm a consumer. None of it hurts my feelings and I think we would all be best served knowing what's reliable and what's not. So call him in, doesn't bother me.

Roush went with the Trutrac and SVT went with the Torsen. OEM's genearlly are not interested in problematic pieces. Yeah, their likely is some inherint flaw in that thinking of mine considering all the TSBs and what not out there. Alternators, VCT solenoids....I get it. You got me on that.

Gmitch is running a Torsen T2R in his car and he has about 700rwhp (maybe more now) and drives like an asshole. He loves his. Besides him, I don't know anybody else running them that I got feedback on other than 19Cobra93.

I would go for the Trutrac simply because I have heard the least issues and the price is hundreds cheaper. That suits me. Reliability and competitive price and it gets the job done.

I have read problems with all of them at some point depending on their application.

I wonder if I ventured over to a forum with a "boss" section and started looking for rear end problems what I would find. I'll probably do that.

 

[Norm Peterson]

Whiskey
Do the BMWs and Porsches put 590 lb/ft through their differentials? Maybe on a few but not most.
Steve

The ones that do probably don't drag race. Ever.


Norm

 

[Conekiller]

Do I need to have Sam come in here and reiterate how many units he has seen fail?

When I talked to Sam, before ordering my t2r from him, he stated the one in he put in his mustang was still going after 2 years of use but he has had lots of failures from the model for the gm 7.5 rearends.

 

[steveespo]

Yes, I am sorry I also should have said that worm gear type diffs are not the best for drag race starts. Too much shock loading. A detroit locker is much better as it is already locked prior to launch. On a road course the wave trac or Torsen are the better choice, Detroit Locker is abrupt when un locking and causes loose condition in cornering. I run Torsen T2R because I road race, if I was a drag racer I would go in a different direction. I am guessing this particular car is a street/strip car.
Steve

 

[sheizasosay]

I think in this section talking about corner-carving is assumed. Until road race tires can equal MT's I'm not concerned with it. EDIT- or unless the levels of force impacting the diff are similiar.

Granted I'm not everybody.


Sent from my iPhone using Tapatalk

 

[Norm Peterson]

Pro-Solo = drag race start + normal autocrossing, in that order . . .


Norm

 

[sheizasosay]

Do those pro touring cars hit like a car with drag radials?
Edit- I guess what I'm trying to get at is the diff should be expected to handle what you throw at without drag radials. If you hard launch with R888's or A6's I would want a diff to handle it. If it can't , I wouldn't be interested. I might not be articulating well.

Sent from my iPhone using Tapatalk

 

[Whiskey11]

http://www.s197forum.com/forum/showpost.php?p=346262&postcount=45

That is just one of his posts about the T2R. That whole thread is pretty interesting.

Norm even a regular start in an autocross can be pretty violent... at least mine are... maybe Im doing it wrong though?

 

[Conekiller]

That post is from 2009 so perhaps his opinion has changed since then? I dunno but Sam had no problem recommending the t2r to me over the phone as of a month ago but still wouldnt recomend it for fbody 10bolt diffs at that time.

 

[Norm Peterson]

"Regular" autocross starts don't always have to be as harsh as Pro-Solo, with considerate course design (IOW, a "clutch-saver" turn placed very shortly past the start timer - Philly Region at least used to be pretty good about this).

I have been able to get into wheel hop on an autocross start a few times, on true street tires that aren't even STX-level sticky (so at least the forces weren't as high). It is something to keep in mind even with a mild 4.6L to either fix or back out of any hop that does try to get started.


Norm