GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Converter Install Question

Thread Tools
 
Search this Thread
 
Old 08-30-2009 | 10:17 PM
  #1  
02slow4.8's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Sep 2008
Posts: 83
Likes: 0
From: Harrison Twp, MI
Default Converter Install Question

Ok, I have a problem. I pulled a motor, dropped a new one in along with a new aftermarket converter. With the converter all the way seated back, there is a gap between it and the flexplate. When i run the bolts into the converter it actually drops and I would assume it is dropping out of its seated position. After I had the bolts in..... the motor gets literally stuck so we know that something is wrong with the way the converter is position. We had the converter all unhooked from the flexplate so we know that it is nothing motor related.

So when you guys put converters in, is there a gap between it and the flexplate and if so, how big is the gap? If there isn't supposed to be a gap.... I got a converter builder to call up.
Old 08-30-2009 | 10:21 PM
  #2  
GMCtrk's Avatar
TECH Senior Member
iTrader: (27)
 
Joined: Jul 2004
Posts: 12,275
Likes: 17
From: Dallas
Default

Do a search, FLT did a write up on this and listed the amount of gap that is allowable. If this gap is too much you can use washers.
Old 08-30-2009 | 10:30 PM
  #3  
02slow4.8's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Sep 2008
Posts: 83
Likes: 0
From: Harrison Twp, MI
Default

Originally Posted by GMCtrk
Do a search, FLT did a write up on this and listed the amount of gap that is allowable. If this gap is too much you can use washers.
I like those words on being able to use washers!!
Old 08-30-2009 | 10:37 PM
  #4  
02slow4.8's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Sep 2008
Posts: 83
Likes: 0
From: Harrison Twp, MI
Default

Push the torque converter back into the transmission as far as it will go. Using feeler gauges or calipers measure the gap between the flexplate converter mounting pad and the torque converter mounting pad. If gap distance is between .060" and .187" it is OK to bolt up the torque converter. If the gap is greater than .187" install a .060" flat washer between the torque converter and flexplate.
On the FLT's write up, it says I should have no more than aprox. 3/16" gap. I have atleast a 1/4" to 1/2" gap!! I don't remember exactly, didn't measure and I will work on the truck tomorrow. But, can this normally happen with converters?
Old 08-30-2009 | 10:41 PM
  #5  
charcold-bowtie's Avatar
TECH Junkie
iTrader: (10)
 
Joined: Jul 2006
Posts: 3,198
Likes: 0
From: Midland Texas
Default

it pulls towards the engine some. Not sure of the specs...
Old 08-30-2009 | 10:46 PM
  #6  
Spoolin's Avatar
GFYS and STFU
iTrader: (8)
 
Joined: Jan 2007
Posts: 13,870
Likes: 4
From: Here and sometimes there too.
Default

They suggest using a drill bit to check the gap, this is how big the gap I had was...


Anymore and you use washers but if it's a huge huge gap I would think there's something wrong, I would measure the height of the converter from the pads to the end of the shaft and find out if its shorter than a stock one.
Keep us updated!
Old 08-31-2009 | 02:20 AM
  #7  
blue2003ls's Avatar
TECH Regular
iTrader: (11)
 
Joined: Oct 2007
Posts: 496
Likes: 0
From: Roseville, CA
Default

I just ran into the same problem on my trans and converter install. The sugested fix from Dave at Yank converters was to shim it with wahers between the felx plate and converter to bring it back within the 3/32" to 3/16" spec. I had a 1/4" gap so I put in some 1/16" washers and haven't had any issues.
Old 08-31-2009 | 06:15 AM
  #8  
02slow4.8's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Sep 2008
Posts: 83
Likes: 0
From: Harrison Twp, MI
Default

Originally Posted by blue2003ls
I just ran into the same problem on my trans and converter install. The sugested fix from Dave at Yank converters was to shim it with wahers between the felx plate and converter to bring it back within the 3/32" to 3/16" spec. I had a 1/4" gap so I put in some 1/16" washers and haven't had any issues.
Knowing that I'm not the only one that had a larger gap than you are allowed is making me feel a little better. I'll have to measure to see exactly what the gap is and go from there.

Last edited by 02slow4.8; 08-31-2009 at 01:47 PM.
Old 08-31-2009 | 01:46 PM
  #9  
02slow4.8's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Sep 2008
Posts: 83
Likes: 0
From: Harrison Twp, MI
Default

So I found out that a car flexplate is different than a truck flexplate... something I really did not know. I was told the truck flexplate is basically completely flat and has a spacer between it and the crankshaft. The car flexplate is a curved flexplate that because of the curve it does not need the spacer. This might affect my spacing but I'm not sure. Does anyone know if either one of those will have different spacing?
Old 08-31-2009 | 01:53 PM
  #10  
charcold-bowtie's Avatar
TECH Junkie
iTrader: (10)
 
Joined: Jul 2006
Posts: 3,198
Likes: 0
From: Midland Texas
Default

call a tranny sponser.



All times are GMT -5. The time now is 11:19 AM.