Converter install issues/questions. Help!
Converter install issues/questions. Help! 1998 Z28 with 4l60e with LS1. I have a PTC converter 3400-3600 stall. In checking clearances, we are finding .334 between the flexplate and converter pads. The only tolerance we have found says that min and max is .060 and .187. Which would mean we would need a .2105" shim between the torque converter and the flexplate, which would be center of the clearances given. Is our thinking correct?
TECH Junkie
Joined: Nov 2013
Posts: 3,913
Likes: 366
From: White Bear, Mn
1998 Z28 with 4l60e with LS1. I have a PTC converter 3400-3600 stall. In checking clearances, we are finding .334 between the flexplate and converter pads. The only tolerance we have found says that min and max is .060 and .187. Which would mean we would need a .2105" shim between the torque converter and the flexplate, which would be center of the clearances given. Is our thinking correct?
Yes stock plate. on a time limit though as I'm using a friend's shop. It was sort of an on the whim deal so unfortunately I won't be upgrading that. Wouldn't machined washer (s) be the best? Doubling up or tripling up seems like it may not be perfectly square.
TECH Junkie
Joined: Nov 2013
Posts: 3,913
Likes: 366
From: White Bear, Mn
yes, I will bring a digital caliper to a hardware store and get 3 washers that a very close because even same washers vary in thickness bit
TECH Junkie
Joined: Nov 2013
Posts: 3,913
Likes: 366
From: White Bear, Mn
Trending Topics
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
The hardware store is fine... just stick to only using hardened fasteners though. Grade 8 (Bolts, Washers, and Nuts) preferably.
In your situation... Metric bolts should be marked as 8.8 , 10.9 , or 12.9 ...
Note: a quick way to establish that the spacing of the flex-plate and torque-converter mounting pads...
Is to grab a 1/16" drill-bit (minimum required spacing) and a 3/16" drill-bit (maximum required spacing) to stick in between the mounting pads.
1/8" is roughly ideal for the spacing... use washers as needed.
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
If you plan to space the converter that much make sure you are not spacing the converter out of the crank to where it is not engaged with the crank. Unless the converter is purpose built a certain way then usually an install requiring so much in spacers has another issue that needs to be addressed(ie: backwards flexplate, wrong flexplate, wrong conv setup, not setup correctly for the crank length being used etc.)
Just food for thought before you go stabbing that transmission up to the block again... If you want to double check pilot engagement with the converter try to hold the converter up to the flexplate(no trans) with the washers/spacers (or equivalent) and see if you can slide the converter around on the flexplate, if not then the converter is being held on center by pilot, if you can chances are you are pilot is not engaged.
Just food for thought before you go stabbing that transmission up to the block again... If you want to double check pilot engagement with the converter try to hold the converter up to the flexplate(no trans) with the washers/spacers (or equivalent) and see if you can slide the converter around on the flexplate, if not then the converter is being held on center by pilot, if you can chances are you are pilot is not engaged.
__________________
FTI COMPETITION CONVERTERS AND TRANSMISSIONS
"IT'S NOT CHEATING, IT'S THE COMPETITIVE EDGE."
1-866-726-8358
info@ftiperformance.com
FTIPerformance.com
FTI Converter build sheet
FTI COMPETITION CONVERTERS AND TRANSMISSIONS
"IT'S NOT CHEATING, IT'S THE COMPETITIVE EDGE."
1-866-726-8358
info@ftiperformance.com
FTIPerformance.com
FTI Converter build sheet
If you plan to space the converter that much make sure you are not spacing the converter out of the crank to where it is not engaged with the crank. Unless the converter is purpose built a certain way then usually an install requiring so much in spacers has another issue that needs to be addressed(ie: backwards flexplate, wrong flexplate, wrong conv setup, not setup correctly for the crank length being used etc.)
Just food for thought before you go stabbing that transmission up to the block again... If you want to double check pilot engagement with the converter try to hold the converter up to the flexplate(no trans) with the washers/spacers (or equivalent) and see if you can slide the converter around on the flexplate, if not then the converter is being held on center by pilot, if you can chances are you are pilot is not engaged.
Just food for thought before you go stabbing that transmission up to the block again... If you want to double check pilot engagement with the converter try to hold the converter up to the flexplate(no trans) with the washers/spacers (or equivalent) and see if you can slide the converter around on the flexplate, if not then the converter is being held on center by pilot, if you can chances are you are pilot is not engaged.
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
Definitely double-check that the pilot of the torque-converter is both supported and centered by the crankshaft.
If not... then FTI can make you a converter that would solve the problem.
Adapters/ spacers do exist, but they are not always ideal depending on spacing and fitment concerns.
Many, many people give this zero thought at all...
Ignoring this, can cause horrible vibration and damage to occur.
I would say that the damage done from this would be similar to:
Removing the harmonic-damper and one piston from your engine... and running it that way! LOL!
If not... then FTI can make you a converter that would solve the problem.
Adapters/ spacers do exist, but they are not always ideal depending on spacing and fitment concerns.
Many, many people give this zero thought at all...
Ignoring this, can cause horrible vibration and damage to occur.
I would say that the damage done from this would be similar to:
Removing the harmonic-damper and one piston from your engine... and running it that way! LOL!
Definitely double-check that the pilot of the torque-converter is both supported and centered by the crankshaft.
If not... then FTI can make you a converter that would solve the problem.
Adapters/ spacers do exist, but they are not always ideal depending on spacing and fitment concerns.
Many, many people give this zero thought at all...
Ignoring this, can cause horrible vibration and damage to occur.
I would say that the damage done from this would be similar to:
Removing the harmonic-damper and one piston from your engine... and running it that way! LOL!
If not... then FTI can make you a converter that would solve the problem.
Adapters/ spacers do exist, but they are not always ideal depending on spacing and fitment concerns.
Many, many people give this zero thought at all...
Ignoring this, can cause horrible vibration and damage to occur.
I would say that the damage done from this would be similar to:
Removing the harmonic-damper and one piston from your engine... and running it that way! LOL!
Well everything seems to be working as intended. It really rips out of the hole.. however, after my third trip I got a p1870 code. I had the cruise set at roughly 58mph for a few miles and the code popped. I do have an Aeroforce Interceptor with a few options for TCC. Any advice on what to look for and what numbers I should be seeing? I'm pretty new to transmissions. It has a PID for TCC Slip and TCC Duty. Could be some others in there somewhere I could turn on, not really sure.
Frost said its not the tune but that its a trans valve body issue. Which to be honest I didn't want to hear. The last 25K miles have been flawless and its still shifting flawlessly today. Theres no way installing the converter is just a coincidence IMO. Ive never seen that code in my life, and it just shows up right after the installation. Any experts please chime in on where to go next.
TECH Junkie
Joined: Nov 2013
Posts: 3,913
Likes: 366
From: White Bear, Mn
Frost said its not the tune but that its a trans valve body issue. Which to be honest I didn't want to hear. The last 25K miles have been flawless and its still shifting flawlessly today. Theres no way installing the converter is just a coincidence IMO. Ive never seen that code in my life, and it just shows up right after the installation. Any experts please chime in on where to go next.
https://www.fitzall.com/supportDetail.php?A74741Q-188
Common issue. There is a video also in that link to avoid having to drop the valve body. Messy but straight forward job.
https://www.fitzall.com/supportDetail.php?A74741Q-188
https://www.fitzall.com/supportDetail.php?A74741Q-188