Tko 600 shift grind
Thread Starter
Drifting
Joined: Feb 2013
Posts: 1,937
Likes: 334
From: Reno Nevada
Tko 600 shift grind
My 5 speed will grind if I pull handle straight down to second gear. If I hold slight pressure to left on hand it shifts fine. It’s installed 427 bb with Z bar clutch set up. Any ideas to what the problem is?. Thanks in advance.
Le Mans Master
Joined: Sep 2008
Posts: 5,662
Likes: 2,344
From: Lake Minnetonka, Mn
2018 C1 of Year Finalist
Do you know if the shift forks have any kind of bushing insert(s) on the TKO for the accompanying rail (1st/2nd)?
Last edited by Dan Hampton; Aug 2, 2023 at 11:55 AM.
Le Mans Master
Joined: Apr 2001
Posts: 5,438
Likes: 1,255
From: Sarver Pa
2021 C1 of the Year Finalist - Modified
My TKO 600 has done that ever since new. It was modified by Silver Sports for high rpm shifting, at that it excells. 7000 rpm , drops right into 2nd. Low rpm gives a light grind same as yours. You want to sell it ?
Melting Slicks
Joined: Apr 2007
Posts: 2,945
Likes: 1,115
From: Hereford AZ
Joe,
I have a Bowler Transmissions modified TKO 600, with a lot of internal "good stuff". However, mine does that still sometimes. I believe the 1-2 shift path for a TKO is a little off (not exactly straight down) and so you have to get used to it. Mine doesn't do it under casual driving, only when attempting to shift at higher RPM (6000+). I don't know how many miles you have on it, but after about 500-700 miles mine "loosened up". I spoke with a TREMEC rep and he recommend taking out the stuff I had in the transmission initially (Dex III ATF) and replacing it with Royal Purple Syncromax. Now they have TREMEC High Performance Manual Transmission Fluid. You could try that. And, you might have done this, but if you have a hydraulic clutch ensure you completely bleed the air out of the entire system. I mean, it can be tough to do that. If you think you've go it done, you might do it again.
I have a Bowler Transmissions modified TKO 600, with a lot of internal "good stuff". However, mine does that still sometimes. I believe the 1-2 shift path for a TKO is a little off (not exactly straight down) and so you have to get used to it. Mine doesn't do it under casual driving, only when attempting to shift at higher RPM (6000+). I don't know how many miles you have on it, but after about 500-700 miles mine "loosened up". I spoke with a TREMEC rep and he recommend taking out the stuff I had in the transmission initially (Dex III ATF) and replacing it with Royal Purple Syncromax. Now they have TREMEC High Performance Manual Transmission Fluid. You could try that. And, you might have done this, but if you have a hydraulic clutch ensure you completely bleed the air out of the entire system. I mean, it can be tough to do that. If you think you've go it done, you might do it again.
Last edited by vjjack04; Aug 2, 2023 at 04:16 PM.
Thread Starter
Drifting
Joined: Feb 2013
Posts: 1,937
Likes: 334
From: Reno Nevada
Grind
I don’t use the silver sport release bearing because they are hard to bleed . The Hydramax is the best I have found - open bleed port , when u get a continuous stream it’s bleed . I have a new American Powertrain TKX to install - their white lightening shifter is great . Thanks for your comments
Racer
Joined: Mar 2015
Posts: 470
Likes: 156
The Tremec 600 has so many advantages from torque rating to the very long first gear and awesome OD. When I'd street race my Tremec 600 it was committed memory to pull the 1-2 shift slightly on the left side. That ensured a smooth shift and with gates you can even powershift 2-3... Tremecs get notchy in the 1-2.....but it's avoidable.
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Thread Starter
Drifting
Joined: Feb 2013
Posts: 1,937
Likes: 334
From: Reno Nevada
Tko shift
When I pull handle slowly to second it feels like it’s not in correct gate/channel. Hard to explain . Just a little handle pressure to left it shifts ok. My American power train TKX - no problem. I think it’s caused by silver sport corvette side shifter positioning?? .
Racer
Joined: Mar 2015
Posts: 470
Likes: 156
I've owned 3 Tremec 600's in Shelby Cobras. They all had Pro 5.0 or Steeda short throw shifters. I now own a Tremec 600 with the American Powertrain Hurst Lightning shifter conversion which like yours is not direct top mounted but off to the side to center our consoles. I can't even explain it but I guess by the time I got to my C2 my mind has been programmed to pull the 1-2 with some slight Palm Left Side Pressure . It's not hard to program your mind. Try it 5-10X at 3-4K rpm shifts then commit that to memory. The main thiong is you know Tremecs like that in the 1-2 shift.....at least mine did. Hopefully, you will soon be pulling 1-2 with little to no notchy feeling. BTW.....sometimes a slow shift is exactly that...feeling every notch along the way. When I'd practice racing I used to shift at 3-4K rpm ...as quickly as I can. Again........once committed to memory ..even around town...your foot will ride off the clutch without a surge . And your tremec will be happier (:->),
Racer
Joined: Mar 2015
Posts: 470
Likes: 156
The TKX is of course the newest version and likely improved. I've power shifted my 600's with zero issues. But....doing the upgrade....you will have no problem selling a TKO 600 especially if it's the 2.97 first gear with 0.64 OD. GLWS.