2-3 shift problem. not engaging smoothly
Thread Starter
Registered User
Joined: Dec 2008
Posts: 9
Likes: 0
2-3 shift problem. not engaging smoothly Hey guys,
I've just built and installed a '94 4l60e in my car. This is the style with the non-removable bellhousing. I've upgraded all of the usual stuff but am having a problem with the 2-3 shift. It will shift and hold gears fine but occasionally you can actually feel the shift taking place. You can kind of feel it going through the stages of the shift (ie. band letting go, then the 3-4 pack applying). It happens fairly often but not all of the time.
I'm running a transgo separator plate with the HD2 shift kit, wide carbon band with a new drum and billet servos. The 3-4 pack is a z-pack set at .020" clearance.
If I had to guess, I'd say that the issue is with one of the holes in the separator plate not being big enough. The sheet that came with the plate had part no. #46-PLT-94 written on it. It says that the plate is fine to use as is, so I've only drilled out the shift kit holes. ALTHOUGH, I did notice that not all of the hole sizes were the same as the original. I'm thinking that this is the problem but am not sure where to look. The box does not have PWM.
Has anyone had any experience/issues with this plate? Sorry for the long post. If you need more info let me know. I'm getting really sick of this box and need to get it sorted so I can enjoy the car!!
PS. I have a line pressure gauge if that helps
I've just built and installed a '94 4l60e in my car. This is the style with the non-removable bellhousing. I've upgraded all of the usual stuff but am having a problem with the 2-3 shift. It will shift and hold gears fine but occasionally you can actually feel the shift taking place. You can kind of feel it going through the stages of the shift (ie. band letting go, then the 3-4 pack applying). It happens fairly often but not all of the time.
I'm running a transgo separator plate with the HD2 shift kit, wide carbon band with a new drum and billet servos. The 3-4 pack is a z-pack set at .020" clearance.
If I had to guess, I'd say that the issue is with one of the holes in the separator plate not being big enough. The sheet that came with the plate had part no. #46-PLT-94 written on it. It says that the plate is fine to use as is, so I've only drilled out the shift kit holes. ALTHOUGH, I did notice that not all of the hole sizes were the same as the original. I'm thinking that this is the problem but am not sure where to look. The box does not have PWM.
Has anyone had any experience/issues with this plate? Sorry for the long post. If you need more info let me know. I'm getting really sick of this box and need to get it sorted so I can enjoy the car!!
PS. I have a line pressure gauge if that helps
Do you mean the band releases before the 3-4 clutch comes on making kinda a neutral between 2-3?
__________________
Thread Starter
Registered User
Joined: Dec 2008
Posts: 9
Likes: 0
The shift still happens relatively quickly but it's just not smooth.
well it should not be smooth with the TG HD2 the shift would feel rather abrupt and a little harsh like . Thats actually the whole point of a shift kit.
On the other hand with the billet servo with the TG HD2 the band may not be releasing fast enough and you could be getting to much overlap this can cause what almost feels like a brake or a momentary shift to 4th then 3rd.
I have never been really keen on the transgo with a billet servo at least not done according to the instructions. I prefer when using those to leave the 2nd hydraulic circuit other than the 2nd gear feed stock with either of the billet servos.
You might try putting the corvette servo back in for second and see what affect that has.
On the other hand with the billet servo with the TG HD2 the band may not be releasing fast enough and you could be getting to much overlap this can cause what almost feels like a brake or a momentary shift to 4th then 3rd.
I have never been really keen on the transgo with a billet servo at least not done according to the instructions. I prefer when using those to leave the 2nd hydraulic circuit other than the 2nd gear feed stock with either of the billet servos.
You might try putting the corvette servo back in for second and see what affect that has.
__________________
Last edited by performabuilt; Apr 4, 2009 at 09:33 AM.
On The Tree
Joined: Jan 2008
Posts: 157
Likes: 0
From: Down Under
I had the same issue on a stock box.. After DIY installing the transgo kit with all billet accumulators and Fairbanks servos the box died. Turns out I'd set up the 2nd apply servo too far advanced so the band was riding the drum.
Also I drilled the seperator plate holes bigger then the instructions recommended and killed the over runs and 3-4 pack.
Great way to get a new box with all the bits
Also I drilled the seperator plate holes bigger then the instructions recommended and killed the over runs and 3-4 pack.
Great way to get a new box with all the bits
Launching!
Joined: Oct 2008
Posts: 294
Likes: 0
From: Bowling Green, KY
Hey guys,
I've just built and installed a '94 4l60e in my car. This is the style with the non-removable bellhousing. I've upgraded all of the usual stuff but am having a problem with the 2-3 shift. It will shift and hold gears fine but occasionally you can actually feel the shift taking place. You can kind of feel it going through the stages of the shift (ie. band letting go, then the 3-4 pack applying). It happens fairly often but not all of the time.
I'm running a transgo separator plate with the HD2 shift kit, wide carbon band with a new drum and billet servos. The 3-4 pack is a z-pack set at .020" clearance.
If I had to guess, I'd say that the issue is with one of the holes in the separator plate not being big enough. The sheet that came with the plate had part no. #46-PLT-94 written on it. It says that the plate is fine to use as is, so I've only drilled out the shift kit holes. ALTHOUGH, I did notice that not all of the hole sizes were the same as the original. I'm thinking that this is the problem but am not sure where to look. The box does not have PWM.
Has anyone had any experience/issues with this plate? Sorry for the long post. If you need more info let me know. I'm getting really sick of this box and need to get it sorted so I can enjoy the car!!
PS. I have a line pressure gauge if that helps
I've just built and installed a '94 4l60e in my car. This is the style with the non-removable bellhousing. I've upgraded all of the usual stuff but am having a problem with the 2-3 shift. It will shift and hold gears fine but occasionally you can actually feel the shift taking place. You can kind of feel it going through the stages of the shift (ie. band letting go, then the 3-4 pack applying). It happens fairly often but not all of the time.
I'm running a transgo separator plate with the HD2 shift kit, wide carbon band with a new drum and billet servos. The 3-4 pack is a z-pack set at .020" clearance.
If I had to guess, I'd say that the issue is with one of the holes in the separator plate not being big enough. The sheet that came with the plate had part no. #46-PLT-94 written on it. It says that the plate is fine to use as is, so I've only drilled out the shift kit holes. ALTHOUGH, I did notice that not all of the hole sizes were the same as the original. I'm thinking that this is the problem but am not sure where to look. The box does not have PWM.
Has anyone had any experience/issues with this plate? Sorry for the long post. If you need more info let me know. I'm getting really sick of this box and need to get it sorted so I can enjoy the car!!
PS. I have a line pressure gauge if that helps
Trending Topics
Thread Starter
Registered User
Joined: Dec 2008
Posts: 9
Likes: 0
Yeah I might have to pull the plate and just match it with the original. If that doesn't make a difference, I might switch back to the corvette as suggested. I've set the band clearance at about 1/8" so I don't think it's dragging at all. The box is very direct once it's in gear.
Also, If I put a pressure gauge on the box and it's at say 200psi on full throttle shifts, can I just turn the PC solenoid torx bit clockwise? Can this be "overwound", so to speak? I understand that 225psi is what to aim for but I'm wondering what would be the best way to up the pressure. Install a shim in the PR valve?
Also, If I put a pressure gauge on the box and it's at say 200psi on full throttle shifts, can I just turn the PC solenoid torx bit clockwise? Can this be "overwound", so to speak? I understand that 225psi is what to aim for but I'm wondering what would be the best way to up the pressure. Install a shim in the PR valve?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Turning the solenoid will raise the line. However this is best done trial and error with a gauge either in car or on a dyno.
If your allready at 200 I would not go more than 1/8 turn.
If your allready at 200 I would not go more than 1/8 turn.
__________________
