do you mean AWD shouldn't be on a two wheel dyno? Because TSi's came FWD and AWD, and a FWD CAN go on a two wheel dyno.

My bad. I do mean AWD. Thank you for pointing that out.

Well he did say the rear wheels where on the dyno so that can't be fwd. But your center diff would be the thing to watch out for. It's a viscous coupling and it's probably not bad for it in the short time before you stopped them. Kinda like coming out of a snow covered lot onto street, the rear tires spin, but the front don't. So is it good, no but I think you avoided burning out your v/c.

Kapok6 said:

do you mean AWD shouldn't be on a two wheel dyno? Because TSi's came FWD and AWD, and a FWD CAN go on a two wheel dyno.

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But they had the rear wheels on it.

Honestly only time will tell, if it drove home with no weird noises your probably fine.

Since I didn't have any issues with it after this incident I figured I was safe, but I wanted to ask those with more knowledge and experience for their input. I would rather be prepared than stranded. I had drained all of the fluids while I had it on the jack stands and didn't see any flakes or worrisome material. All things considered, I think I got lucky. I'll be sure to remind them when I take it back to get inspected.

I wouldn't worry about a few seconds.

My response was referring to the OP's very first sentence as it being a tsi has nothing to do with what kind of dyno it's on.

My question is.. if the rear wheels were on the dyno drum and spinning with the engine being reved... why were the front wheels not spinning?

Was wondering that also. I'm also wondering if OP now has a rear-wheel drive DSM and just thinks everything is ok.

Maybe they jaked the front up. Lol regardless if he drained the fluid and it was clean..... When my trans blew the fluid looked like metallic paint

Maybe they reved it in neutral before they actually started op would know.

Man, that escalated quickly. I was being nice to Kapok6 since I did indeed start with partial information even though I also stated the rear wheels where spinning. Then again, I didn't realize TSi's came in FWD so I'm sticking with thanking Kapok6 for pointing that out.

UrbanSmoker said:

regardless if he drained the fluid and it was clean..... When my trans blew the fluid looked like metallic paint

Maybe they reved it in neutral before they actually started op would know.

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If it killed the VC there wouldn't be any metal in the trans.

synthetek said:

If it killed the VC there wouldn't be any metal in the trans.

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Not yet, wait for the center diff to follow shortly behind.

pauleyman said:

I wouldn't worry about a few seconds.

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Thanks for the vote of confidence.

BogusSVO said:

My question is.. if the rear wheels were on the dyno drum and spinning with the engine being reved... why were the front wheels not spinning?

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Don't know enough about the overall system. I figured that it worked through PFM and since it took little effort to spin the rear wheels that's just how it worked out.

Calan said:

Was wondering that also. I'm also wondering if OP now has a rear-wheel drive DSM and just thinks everything is ok.

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I sure hope I still have AWD. I didn't run it while on the jack stands as I specifically remember reading not to do that on one of the cars informative stickers. FYI...if you ever move out of country and replace the hood, you need to retain the EPA stickers from the hood or get a letter from the EPA to "import" the car back to the US.

UrbanSmoker said:

Maybe they jaked the front up. Lol regardless if he drained the fluid and it was clean..... When my trans blew the fluid looked like metallic paint

Maybe they reved it in neutral before they actually started op would know.

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The front was not jacked up, the car was in drive, and the rear was definitely spinning. I do wish I had looked more closely at the fluids, but when I was looking nothing seemed bad and none of the magnetic drain plugs had collected anything to speak of. The guy I bought it from had put a new transmission in at some point, TRE I believe. The fluids all looked fresh and minus the fact that the drain plugs required a breaker bar to get off, the transmission filler plug was only finger loose, and the mount to transmission bolts were loosely hanging on by a thread I feel pretty good about the whole situation.

I slacked off entirely too much today reading through old posts on here and never made it out to test drive the car and break in the new brakes. I will do so tomorrow and maybe even shake some of the carbon/rust loose and get back to everyone.

synthetek said:

If it killed the VC there wouldn't be any metal in the trans.

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UrbanSmoker said:

Not yet, wait for the center diff to follow shortly behind.

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I have my other TSi AWD for parts if that's the case. I hope it's not needed though.

I can admit I know nill about the drive line in an AWD DSM.

But I hear not to tow an AWD on a sling back truck, it will shred the Tcase.

I honestly can not see how the rear spin and not the front with the trans in gear.

About the only thing I can think of is the dyno drum was set in motion thereby spinning the rear wheels....

But I do not know if any dyno would start like that.

So a RWD DSM... would have to be a Conquest TSi???

Never heard of a Conquest, but after looking one up I'll pass. This is definitely a Talon TSi and not meant to be RWD. On my other Talon I had the T-Case freeze and when the tow truck pulled it onto the bed it actually broke the transmission. Got a free T-case from the dealer through that old recall, but had to replace the transmission.

I had this happen to me too, but my car was a GS-T (FWD) that I converted to AWD and the emissions shop looked at the VIN and thought it was still FWD. Fortunately in my case, he put the front wheels on the roller and chalked the back of the rear tires so when we revved it up to start rolling the dyno it just drove over the rollers.

In my defense, I told the guy about a dozen times the car was AWD not to put it on the rollers but he was from Thailand and English wasn't exactly his preferred language. I about lost it though, glad there wasn't a wall or shelf immediately in front of the rollers or my car would have been damaged pretty badly...

Anyway, about your problem. If they stopped immediately the car's probably fine, had they continued to drive it like that though it probably would have burnt of the VC. Just jack the car up off all 4 wheels, start it, and drive it (with the wheels off the ground) and see if everything's turning.

Now im wondering why it didnt drive off.

gofer said:

Anyway, about your problem. If they stopped immediately the car's probably fine, had they continued to drive it like that though it probably would have burnt of the VC. Just jack the car up off all 4 wheels, start it, and drive it (with the wheels off the ground) and see if everything's turning.

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There is an orange sticker in the driver side door jam that says not to start the engine or rotate a single tire when off of the ground.

I would have freaked out

I am also at a loss as to how the car didn't just drive off.

pauleyman said:

Now im wondering why it didnt drive off.

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So here's my theory. Just read up on VCs in general and ours specifically. As I understand, the VC is inside the center differential with one side being the driving and the other side being the driven side. Each side connected to discs with some kind of viscous liquid in between. If either the driven or driving side slips that causes friction inside the VC and the viscous liquid in turn gets thicker creating more resistance and the resulting increase in torque is transferred to the non-slipping side.

For a quick second I thought that since this happened for a limited time the front brakes created enough stopping power to overcome the torque exchange within the VC. Then I just shook my head as I realized that should’ve stopped the rear wheels in the first time so just disregard.

Now that I talked myself through that I'm right back with you on wondering why it didn't roll off the dyno because the car wasn't blocked or tied down to anything.

I had no idea places put cars on dynos for emissions testing. That sucks. I don't know the stuggle no emissions testing in my county