What is inside a Helical Posi Differential? Eaton TruTrac and Strange STrac internals.

Рет қаралды 7,326

Жыл бұрын

Some rear end noise from a 1300 whp gt500 caused us to investigate and get inside a Eaton TruTrac differential to make sure it was clean and all was good.
There was some bearing delamination and main culprit was a cracked axle bearing race. we went through everything inspected, cleaned, replaced and reassembled.
Thank you,
- SSP Team
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Пікірлер: 23

@eldedo8927 Ай бұрын

ahhh, a torsen differential, love em. Good info.

@bryanrosales4544 Ай бұрын

Extremely informative greatly appreciate this video 👍

@Lethal_Venom Жыл бұрын

That’s really neat, thanks. I’m looking forward to getting rid of my cobra clunk with the IRS getting done finally

@pinkysgarage4517 2 ай бұрын

What an excellent video. I burned up a TracLoc and replaced it with a TruTrac last year. All I know is that it's stronger and works all the time for me. Just in a fun street car. You obviously know what you're talking about, AND you know how to explain it well. Really enjoyed this video. Thanks! New subscriber, too.

@dadgarage7966 3 ай бұрын

Eaton also recommends conventional 80W90 for most types of driving.

@randyc.1766 5 ай бұрын

Been thinking about getting one for my avalanche and burban,

@rlamas67 8 ай бұрын

Installed one in my 87 Grand National, it's been great so far however the gear slop is a bit of an issue

@robertclark2935 6 ай бұрын

So did I on my GN, I went with Eaton & Richmond Gears mine went Great! (G-tech) 1.86 60fts. on Black top no burnouts. Have-not went to the track yet. I'm impressed.

@flatheadfletch 4 ай бұрын

Putting one in my two wheel drive XJ now with 3.90 gears.

@jasonrunner7698 2 ай бұрын

What did you torque everything down to?

@michaeljakubowski8356 11 ай бұрын

Thanks for the video... When you mention that the Trutrac noise.... I have a manual 5sp coupled with a Trutrac in a Dana44 housing in a 84 TransAm. If have the clutch fully engaged at low rpm and I throttle on&off quickly I get a hard clunk,clunk noise in the car. I replaced the axle shaft bearings which did have .015+ endplay, new driveshaft ujoints & balance and still suffer from the listed noise. I have determined that it is the rotational endplay of the Trutrac and the the internals of the trans. Does this sound correct and is this the noise that you were stating is inherent of the the trutrac? The car launches nicely and i use it for street and autocross with no complaints except the listed sounds. Thanks in advance! MikeJ

@nicholassmerk 2 ай бұрын

Mine does't clunk. I've had squeals at VERY hard lock ups (one tire on pavement and one in snow), but I may have a bad journal in my rear end. I wouldn't be surprised if those pinion gears can squeal under the correct load. I'm assuming it's not an issue because I have over 50k miles on it by now. Check your torque arm bushings, axle wrap likely would cause clunks. I'm assuming that's not your issue if you autocross, you would have already done all your bushings.

@michaeljakubowski8356 2 ай бұрын

@@nicholassmerk thanks for reply. Curious if your car is a manual or automatic? I don't think the noise I hear is axle wrap as it is not under any load and at such low speeds. Just idling with full clutch engagement, then quick on&off throttle which rocks the car abruptly to make the clunking noise I have. The rear bushings are all the Spohn delrin spherical joints in lower control arms, panhard bar & adlustable torque arm. I have determined that it is the slop in the trans & TruTrac driveline endplay that are creating the noise. It is not something that happens out on the road or track while driven normally.

@nicholassmerk 2 ай бұрын

@@michaeljakubowski8356 auto. I understand what you mean now after reading your reply.

@newbiesymbian 14 күн бұрын

Are this recommended for drift car?

@don.timeless4993 3 ай бұрын

about the noise, anti friction additives could be added to the diff oil like EZI Extra Power to eliminate 70% of wear & noise

@MikeBaxterABC Ай бұрын

5:49 ... In this case (if one wheel is completely off the ground) And assume you are traveling slowly ... You can just lightly apply the brakes (or hand break if it's back wheel), and that will freeze "the off the ground wheel" and put all the traction to the wheel that's ON the ground.