Z ELIMINATOR

iTrader: (3)

Any body have any information on how long a built 5 AT has lasted with a turbo engine say 500. 600 , or 700 rwhp.

Z

deanfootlong

iTrader: (10)

500 whp - 500 miles. 600 whp - 600 miles. So on and so forth.

midz350

iTrader: (4)

PM "rcdash" I think he got the GTM BUILT AT and putting down +500whp.

str8dum1

iTrader: (11)

if you really want to build a decent power AT car, there is only 1 proper way to do it....

https://my350z.com/forum/drivetrain/...l-housing.html

booger

iTrader: (6)

400whp is about as high as you want to go with a stock AT5.

RudeG_v2.0

iTrader: (1)

There aren't any fully built 5AT's in this community that have lasted with any reasonable reliability or longevity beyond 500-550whp/wtq (and I mean constantly run at that power level; not run at ~400whp on low boost most of the time and occasionally run at 500+ for very brief periods). If you intend to go beyond 550, you should seriously consider doing a GM trans swap.

rcdash

iTrader: (18)

Mine has been doing fine around 520 whp / 480 wtq (DJ STD) for 25k miles now. Not sure I really want to push it much farther. It seemed to hold fine up to 580 wtq on Forged's DD dyno but I don't think I'd run it there constantly...

So who's used the VTR parts - what are the ancillary mods required?

Sylvan Lake V35

iTrader: (23)

PM rcdash I bet he gets a ton of PMs, I always tell the auto guys that ask me or post questions on driver to PM him as well

Z ELIMINATOR

iTrader: (3)

I'm hooking up a speed forece racing bult 5 AT to a GTM 4.2 stroker with wolf 850 tt's.
I see now that running more that 500 rwhp is going to be a big mistake.
For the drag strip i have built jerrney Tibs turbo 400.
I was hoping to put 600 to 650 to the 5 AT.
i see now that i will be running low boost say 10 to 12 lbs. with the built 5 AT. Is it true that GTm's and turbo Tims are built the same company.
Z






Z

rcdash

iTrader: (18)

If it's a drag car, then perhaps the GM trans conversion is the way to go. If it's a street car, there's no question in my mind that the JATCO transmission will hold just fine provided that ATF temperature is monitored, fluid levels are set correctly and the ATF drain/fill schedule reflects usage. I'm getting to the point where if my built 5AT needs a rebuild, it won't be unexpected, so I decided to up the boost. At 20 psi, the car is putting out I'd say on the order of ~650 wtq DJ/STD (not yet confirmed on a DJ) and there is no traction shifting on street tires. So I'm reworking the boost strategy to provide a better torque curve instead of one that looks like a mountain - better for traction and the 5AT.

I have observed many people build their cars only to sell them because the car ends up meeting one goal only to fall short in others. It's much harder to build a car that meets new goals (usually power), but doesn't compromise other facets that were originally taken for granted (like aesthetics, comfort, utility, driveability, safety, reliability etc). This makes me reluctant to make such a major change to the drivetrain. I guess I would consider going to a MT, but even MTs have components that fail, and they are not cheap either.

I don't know which company builds the 5AT for GTM and SFR. Sam apparently worked in a transmission shop for 8 years prior to opening GTM and he seemed to have a lot of first hand knowledge of the modifications, but it would make sense that they both outsource the work to transmission specialists. I would of course love to find someone local that I could trust. Good luck.

MardiGrasMax

iTrader: (8)

Ive got about 50k miles on my trans, 10k stock, 40k boosted. Not sure on the power level but its pretty fast. I drive it like an adult most of the time, use the power when I find a car I want to run against, and some times just for fun too. It has an OE trans with TransGo VB kit, external cooler, external full size fluid filter, RedLine D4 ATF fully flushed every 20k miles. Temps always monitored, and a suplemental fan controller to keep the fan in front of the external cooler running more often. I agree that temp and fluid failure is THE killer.

The UpRev torque managment control is also worth mentioning. The torque managment in the factory TCU is working off of inputs from the ECU that are mapped to NA power levels. When you add boost the TCU applys an NA soft torque managment strategy and this puts a lot of stress on the friction material under part throttle boost, which most of us do a lot of on the street in full auto mode. At WOT in manual mode the TransGo VB parts solve all the issues in 1-2, 2-3 shifts, 3-4 is still soft due to the TCU torque managment. The UpRev torque managment is more aggressive should cause less ware on the trans during part throttle full auto boosting. Most of the domestics have these sorts of thing available to them to assist with the added power levels on stock trans missions and they work well. Unfortunattly we are a niche market for this type of thing and it just became available earlier this year. I have my UpRev order in the works...

Link to the thread discussing the new feature https://my350z.com/forum/tuning/5004...ement-now.html

weslutes

iTrader: (7)

GTM 5AT
468/438 DD @ 14.5lbs
Only about 500 miles so far

rh_334

iTrader: (2)

Did you street tune?

MardiGrasMax

iTrader: (8)

Yes, by my self, UTEC and using the UTI logger.

TwoFiveBar

Dont buy a GTM. Just go straight to a direct transmission shop for the upgrade - drop the money and buy a Level 10 Trans, TQ Converter and VB. They'll build it to your specifications. I've seen them hold 600-650whp/tq (DJ) with no problem over the course of a year with no signs of stopping. Not cheap, probably run you 5-6K+. Also add a trans cooler - Stillen makes one that is relatively cheap. Good luck

Oh, and +1 to what MardigrasMax said about the UPrev TQ software.

k6750gsxr

iTrader: (17)

I have a transmission built by a local shop here in tampa. Held 5**rwhp and 5**tq on a mustang dyne. I drive it at 9 psi daily which is 450 ish hp. Never had an issue. I have about 10k on mine.

str8dum1

iTrader: (11)

for 5-6K you can do a GM tranny swap that will hold 1000wtrq

k6750gsxr

iTrader: (17)

This is true. I had a very high end shop on this board quote me 7k for a th400 tranny good for 1000tq. I would imagine with the kit vinny t has one could have a th400 built and use that kit for around 5k or less.

My personal 5at was built for around 2500$

TwoFiveBar

Good point. If you don't mind the change in drivability. It will def hold the power, but wont be very much like driving the stock 5AT.

MardiGrasMax

iTrader: (8)

Exactly why I will never do it.



But the thought of using a trans-brake to launch a boosted VQ is dead sexy!