Sidewall Bump.. (morphed into Transmission replacement)

[Neveready]

I also have notchy 1/2 on cold but I thought this was normal for the tremec.

I have never experienced any issues 1-2 or other gears on my 5. Cold, warm, never an issue.

The problem is notchy shifts are subjective. If you all keep shifting into 2nd and it doesn’t slip into gear as smooth or as easy as any other gear then the synchro is wearing down and eventually it will need to be replaced (partial rebuild). Anyone who experiences this should be double clutching in 2nd till the transmission fluid is fully warmed up or rev it out to shift into 3rd.

The dealer is doing the right thing by replacing it, the parts to rebuild it may not be available, they may not have a tech with that expertise and it’s still a newer car. If it was an auto they’d never risk a rebuild at a dealer so it shouldn’t be any different with a manual transmission.

 

[Sully]

The problem is notchy shifts are subjective. If you all keep shifting into 2nd and it doesn’t slip into gear as smooth or as easy as any other gear then the synchro is wearing down and eventually it will need to be replaced (partial rebuild). Anyone who experiences this should be double clutching in 2nd till the transmission fluid is fully warmed up or rev it out to shift into 3rd.

The dealer is doing the right thing by replacing it, the parts to rebuild it may not be available, they may not have a tech with that expertise and it’s still a newer car. If it was an auto they’d never risk a rebuild at a dealer so it shouldn’t be any different with a manual transmission.

The service manager at the dealer is pretty good, from the onset, he said he did not want to rebuild the transmission after finding abnormal metal debris in the fluid. However, he was required by GM to breakdown the transmission to determine causation prior to (I'm guessing) getting the approval from GM to replace the transmission under warranty, which makes sense. Granted, if anything, I've babied the shit out of this car (i know, i know.. one day the training wheels will come off), I'm very curious to find out from the Tech what was found.

 

[Deneed4spd]

My 2nd gear shift is definately not as smooth as any other gear. Almost feels like I have to push past another layer of resistance, click to get it to engage. Sheez…

 

[PFunk_19]

My 1st and 2nd gear are a bit notchy, while the rest are smooth. I've only got around 250 miles on mine. I also just thought it was normal for the Tremec.

 

[CBH]

Sorry about the delay, but glad its covered.

 

[1Evil55]

My M6/BW4 is/was notchy. I took it in this week to introduce it to my local stealership for an oil change. I had them pull up the history of its first 3600 miles before me. No info at all. Had the oil and diff done. Shifts are definitely different now for the better.

 

[5VBW Nick]

My M6/BW4 is/was notchy. I took it in this week to introduce it to my local stealership for an oil change. I had them pull up the history of its first 3600 miles before me. No info at all. Had the oil and diff done. Shifts are definitely different now for the better.

When you say you had the oil done, do you mean gear oil?

 

[1Evil55]

When you say you had the oil done, do you mean gear oil?

I will say the notchyness has not completely gone away. There are still moments it isn't smooth like you'd expect. Problem is it isn't consistent. I don't feel as though my driving is different from shift to shift. I don't slam through gears at all. Really I would almost consider myself a lazy shifter meaning I am slow between gears. No difference from cold to operating temps either.

 

[GoPlz]

Mine is in the shop now for the 2nd gear notchiness issues. Mine has been persistently difficult to shift into 2nd when cold, but also when hot. Particularly after a long highway run when shifting down through the gears it doesn't want to go into 2nd. Dealership was talking to corporate yesterday but it sounds like I'll be receiving a new transmission also.

 

[FLYARMY]

These posts make me happy that I got the 10 spd automatic.

 

[piranha971]

The second gear notchiness and just overall stuburness has been complained about on this tranny since its inseption and in its every application. It will always be there. Replacing the oil with something else helps as well as bleeding the clutch.

 

[CT5BWenthusiast]

These posts make me happy that I got the 10 spd automatic.

I've owned a series of manual transmission cars, including a V and agree the 10-speed auto in the BW5 is the best transmission I've ever personally experienced. No slush in that slush box and lighting fast shifting that was as smooth as butter. Now on the other hand, the 7-speed auto in the Audi A6 I replaced it with makes me wish I had a manual transmission back. Even in the "S-Line" setting it shifts with about as much delay as you'd expect from a Buick LeSabre circa 2005.

 

[Melon]

Glad they're warranty-ing the trans.

I'm surprised they didn't ask you if it had a hemi in it.

 

[Melon]

Oddly, the TR6060 in my Camaro was smoother than the one in the CT4.
GM Quality strikes again!

 

[668LT4]

I'm now on my 3rd and final Blackwing. 2022 4, 2022 5, and now a 2024 5. My new one is not yet to 200 miles but feels great. Same for the 22 5, no notchiness. My 4 Blackwing did have occasional trouble getting into 2nd, but not as much as described in many threads here. I recall a few times trying to shift into 2nd, feeling it was not happening, easing off and trying again and it worked fine. But at least in my experience, they have not all been the same.

 

[Melon]

Consistently inconsistent.

 

[Sully]

The BW is back home. The transmission and both front tires were replaced under warranty. Took about 2 months for various dealer related issues but it's done.

I got about 10 minutes down the road and boom, steady check engine light as well as a "Service Instrument Cluster" message. Ran my OBD scanner and the check engine is a P015A code, relating to B1S1 O2 sensor.... back to the dealer I go.

Another small issue I noticed and may very well be a driver issue along with a new/tight transmission, is that I need to make sure I make a purposeful shift into 1 from N. If not, it bounces right out as I lift the clutch. This wasn't a thing previously.

What I did find interesting/confirmation when I went through the parts list for the transmission replacement. The fluid used was 88861800 which is the ACDelco 75w-90 Manual Tran / Transfer case fluid. Exactly as specified in the service manual. I know there's been conflicting info out there on whether the above fluid or Dextron III ATF should be used.

 

[Deneed4spd]

The BW is back home. The transmission and both front tires were replaced under warranty. Took about 2 months for various dealer related issues but it's done.

I got about 10 minutes down the road and boom, steady check engine light as well as a "Service Instrument Cluster" message. Ran my OBD scanner and the check engine is a P015A code, relating to B1S1 O2 sensor.... back to the dealer I go.

Another small issue I noticed and may very well be a driver issue along with a new/tight transmission, is that I need to make sure I make a purposeful shift into 1 from N. If not, it bounces right out as I lift the clutch. This wasn't a thing previously.

What I did find interesting/confirmation when I went through the parts list for the transmission replacement. The fluid used was 88861800 which is the ACDelco 75w-90 Manual Tran / Transfer case fluid. Exactly as specified in the service manual. I know there's been conflicting info out there on whether the above fluid or Dextron III ATF should be used.

I just ponder even if I have a slight notch in tranny for my 2nd gear, I just live with it. The amt of techs who can take apart the car and put it back together correctly for a tranny or eng change is slim to none. They all get paid a flat rate and they just move very quickly. I would trust a non dealer tech more that specialize in corvettes/cameros.

 

[Sully]

I just ponder even if I have a slight notch in tranny for my 2nd gear, I just live with it. The amt of techs who can take apart the car and put it back together correctly for a tranny or eng change is slim to none. They all get paid a flat rate and they just move very quickly. I would trust a non dealer tech more that specialize in corvettes/cameros.

This was the issue at my local dealer and why it took so long. They had only 1 master tech certified in the V/Blackwing models. The Service Manager thankfully ensured that only this tech did the work. As with many dealers, getting and maintaining a qualified headcount is a struggle.