[OzzySS2017]

Hello all,
I have a 2017 M6 2SS that just hit 48000 miles. It’s been great so far and the TR6060 has also been great. Replaced stock tranny fluids on it about 15000 miles ago with royal purple. Earlier today I was driving home from the gym and the car would not go into first gear at all. It feels like it has a lock out that is engaged. Had to go from every red light in 2nd. Engine was at temp however because it’s a short drive there and back the trans was not over 100 degrees according to the performance page. (I unfortunately live in cali so it was about 63 degrees outside). Sometimes as I’m sure y’all know these transmission can be a little grumpy when they’re cold but never a complete gear lock out. Did some quick troubleshooting. I shut the car off and tried to get it into gear, no go. All other gears are fine. If I try to force it into gear with the clutch disengaged it will roll forward and the gears will grind. Tomorrow I plan to take it out and get the trans completely up to temp and see if it’ll fix itself.

Did some reading and the internet says that tremecs don’t have a first gear lockout however it feels like that. The shifter will start to go into first but won’t go further into gear. **update** got the trans up to temp, didn’t help. The issue is also in 5th gear. The car does not recognized that it’s going into either gear which makes me think it is not a synchro issue but an issue with the gear selecting. However interesting because there is not connection between 1 and 5. Pretty sure they are in two different compartments in the trans even.

I’m wondering if my synchros are not aligned somehow or if this is leading to a bigger issue. I did have an issue a couple weeks ago where I had to slam on my breaks when someone cut me off coming out of a parking spot. It got jammed in first because the car was almost stopped before the clutch was in. However that was about 400-450 miles ago and I haven’t noticed anything since. Hopefully the larger Camaro community might have some insights besides taking it to the dealership (don’t trust them).

Thanks all and appreciate your time

[Ventmaster]

Does your car have any modifications/upgrades like aftermarket shifter or any other recent maintenance performed? Which type of RP did you use when changing the gear oil in the trans? And welcome to the site!

[ctrlz]

it sounds to me like you might have a bad shifter.
from what I can tell from the service manual, the shift gating is all handled by the shifter unit.
There is a single rod which connects shifter to tranny.
On the tranny's back upper right side, just above the output shaft speed sensor, there is another sensor which reports the currently selected gear. This is a Hall effect sensor which detects the position of a magnet inside the transmission.

In your position, I would probably pull the shifter and see how it runs through the gears when not linked to the tranny.
I looked on ebay, and did not see any currently listed manual shifters for our car.

[OzzySS2017]

After messing with it I do agree it feels like the shifter box. I’m going to order the 1le short throw shift and install it. If it doesn’t work then I’ll take it in to get it looked at. I’ll let you know what happens.

And to respond to the post about upgrades, no it only have a cold air intake. Nothing else

[DeuceCam]

Edit: I removed my post because the info was incorrect.

[ctrlz]

Are there online instructions for the 1le short throw shifter installation?

EDIT: Can't find instructions. But this thread indicates this is a tough install. Difficulty rating 10/10!
https://www.camaro6.com/forums/showthread.php?t=575564

[Ventmaster]

IMHO if you are going to upgrade the shifter, I'd recommend the Hurst shifter. A great deal of folks have been very pleased with the shorter throw it has. Shifter install is more involved on this car than they were on the 5thGen cars.
If you're intimidated, you can always take it to your friendly Chevy dealer and they can install for you using their 1LE shifter install guide and the very detailed instructs from Hurst. You will not regret it!

[ctrlz]

Here's a link to the Hurst installation instructions. It says 4 cyl and 6 cyl, but I think it's for the V8 as well.
https://documents.holley.com/71df7c5...3190890edd.pdf

[Ventmaster]

Originally Posted by ctrlz

Here's a link to the Hurst installation instructions. It says 4 cyl and 6 cyl, but I think it's for the V8 as well.
https://documents.holley.com/71df7c5...3190890edd.pdf

Yes, the Hurst is the "honey badger" of shifters- It don't care! At least on these Camaro's it doesn't. V8, V6, or 4cyl. It will work just fine. I pretty sure one "oldman" that posts around here from time to time, called it "the best modification" he had done to his Camaro up to that time.

[Val Walkinshaw]

after I had my trans worked on (new 3rd gear and upgraded all synchros) I had the company install the Hurst. there are only 3 options for this car, stock, stock on the 1le and the hurst. that's it. it's a bitch to install by yourself but doable. best to do when the trans is out.

[Ventmaster]

Update: the shifter I have is this one- Part #
3916031. That's the classic cueball shifter (it has a threaded top you can swap out for different sizes or styles). The 3916050 shifter I think uses a pistol grip on top, although there may be other options as well. It is the less expensive of the 2.

Update to the update: the threaded top does allow for a greater number of handle options. Like the classic Hurst 'T' handle which I had removed because it gets really hot here in summer (OK- everywhere!). But I'm talkin' "blister your hand hot" on aluminum objects like the shifter you gotta touch to go home! So I opted for the Epco smaller white ball with just a SS logo. But it's winter now, and I see the Hurst 'T' is $45 these days! Geez, talk about inflation-LOL.

[OzzySS2017]

Hello y’all
quick update now that the holidays are over and I was finally able to work on the shift problems. Got the 1LE short throw installed (not the most fun I’ve had, especially after getting it on the lift and finding a nail in the rear tire) and big surprise it did not fix it. I was a little skeptical when I got the part but I’m always down for the easy approach first.

Next step; Drained the fluid and oh boy it looked it looked like purple metallic paint. Rain my magnet through and found a lot of rather large chunks and other metallic debris. Note: there was a lot more particles than just what’s on the picture linked before anyone asks I just didn’t take a picture of all of it.

Called a bunch of transmission shops and no one will take just the transmission in, they want the car put together so they can diagnose it. Sounds more like they just want as much labor charges as possible to me. So, since everything’s out of the way and a trans pull isn’t too hard this leads me to my next venture, rebuilding the transmission myself and finding what synchro or what is wrong with the damn thing. Going to order the Texas performance TR6060 rebuild stage two kit with the carbon synchros and metal fork bushings. Hopefully that’s all that’s needed. We shall see but when it rains it pours. Thanks for all the inputs and I’ll keep it updated for those interested.

Also taking recommendations for trans fluids. Had royal purple synchromax (synchromesh whatever it’s called) but down to try anything else so if anyone has recommendations it would be appreciated.

[Ventmaster]

OP I am wondering about RP Synchromax as well. The OE gear oil in my 2017 SS is GM part# 88861800 from AC Delco (their part# is 10-4033) and is a 75w-90 viscosity. RP Synchromax has a viscosity rating of 10.
I have tried Royal Purple 75w-90 gear oil with limited results (helped the cold shifting for a while but didn't last). So I tried Motul, Amsoil, Mobil 1, etc. No joy in Muddville.
So I keep seeing folks referencing Synchromax as a better choice BUT if you review it closely, Royal Purple's specs say it's a 10 weight oil "recommended for manual transmissions that specify an automatic transmission fluid or motor oil" (Summit Racing). Like my '86 Camaro manual trans- but not specified for 6th Gen Camaros! Some retailers are using "automotive transmission fluid" I believe to muddy the water (oops! a misprint- obviously...not).
Royal Purple also proudly displays "High Performance Manual Transmission Fluid" but it is ONLY in those vehicles that specify they can use A(utomatic)TF.
Am I wrong about this??
Thanks in advance for your opinions, facts , or ideas.

[atx_traveler]

Originally Posted by Ventmaster

OP I am wondering about RP Synchromax as well. The OE gear oil in my 2017 SS is GM part# 88861800 from AC Delco (their part# is 10-4033) and is a 75w-90 viscosity. RP Synchromax has a viscosity rating of 10.
I have tried Royal Purple 75w-90 gear oil with limited results (helped the cold shifting for a while but didn't last). So I tried Motul, Amsoil, Mobil 1, etc. No joy in Muddville.
So I keep seeing folks referencing Synchromax as a better choice BUT if you review it closely, Royal Purple's specs say it's a 10 weight oil "recommended for manual transmissions that specify an automatic transmission fluid or motor oil" (Summit Racing). Like my '86 Camaro manual trans- but not specified for 6th Gen Camaros! Some retailers are using "automotive transmission fluid" I believe to muddy the water (oops! a misprint- obviously...not).
Royal Purple also proudly displays "High Performance Manual Transmission Fluid" but it is ONLY in those vehicles that specify they can use A(utomatic)TF.
Am I wrong about this??
Thanks in advance for your opinions, facts , or ideas.

Have you tried using Redline D4 ATF? I've been using it the last couple of years and have had good experience with it. I change it every 20-30k miles.





With the OEM fluid, if I left the car parked outside overnight in the winter, I had a really hard time getting it into 1st in the morning. No problems with the Redline fluid. I'm talking 30-40F here in Texas.