4L60E SmartTech forward clutch clearance
4L60E SmartTech forward clutch clearance I'm using blue plates on a 4l60e build with a smarttech input drum, and have all clutch clearances where I want them....with the exception of the forward clutches, which have .015
I'm thinking that I should be shooting for .030-.035, but am not seeing any options for steels, apply plate, or pressure plate that will get me where I think that I need to have it.
From top to bottom, here's the stack that I'm using for mock up:
-.228 Pressure plate
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.069 Wavey plate
-.169 Apply plate
The .015 clearance that I'm measuring currently is with USED steels....when I replace them with new ones, the only option that I'm seeing available is for .090 steels....which will get me to a zero-clearance situation.
Any thoughts on how to solve this?
I'm thinking that I should be shooting for .030-.035, but am not seeing any options for steels, apply plate, or pressure plate that will get me where I think that I need to have it.
From top to bottom, here's the stack that I'm using for mock up:
-.228 Pressure plate
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.071 Friction
-.088 Steel
-.069 Wavey plate
-.169 Apply plate
The .015 clearance that I'm measuring currently is with USED steels....when I replace them with new ones, the only option that I'm seeing available is for .090 steels....which will get me to a zero-clearance situation.
Any thoughts on how to solve this?
Thanks! :-)
Edit: Still not seeing it. Are you referring to the FORWARD clutch, or 3/4 pack?
Last edited by salemetro; May 21, 2015 at 02:35 PM.
Oops, I was referring to the 3-4 pack, but there are also different sizes for the forward clutch plate
http://www.makcotransmissionparts.com/4L60E-4L65EPressurePlates.html
http://www.makcotransmissionparts.com/4L60E-4L65EPressurePlates.html
Oops, I was referring to the 3-4 pack, but there are also different sizes for the forward clutch plate
http://www.makcotransmissionparts.co...urePlates.html
http://www.makcotransmissionparts.co...urePlates.html
There may be some thinner steels available for the forward clutch pack if you want to use the frictions you already have.
Last edited by coryforsenate; May 21, 2015 at 04:53 PM.
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Which overrun and forward pistons are you using?
The Sonnax SmarTtech input drum uses their reinforcement ring and therefore cannot use the stock steel pistons.
IIRC Sonnax supplies a custom overrun piston and recommends either a old-style aluminum forward piston or their (expensive) billet forward piston.
Instead I used a custom billet overrun piston (available from FinishLine Transmissions) with a stock steel forward piston.
I never measured the forward/overrun clearance - it seemed to move plenty when I air tested it.
The Sonnax SmarTtech input drum uses their reinforcement ring and therefore cannot use the stock steel pistons.
IIRC Sonnax supplies a custom overrun piston and recommends either a old-style aluminum forward piston or their (expensive) billet forward piston.
Instead I used a custom billet overrun piston (available from FinishLine Transmissions) with a stock steel forward piston.
I never measured the forward/overrun clearance - it seemed to move plenty when I air tested it.
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Which overrun and forward pistons are you using?
The Sonnax SmarTtech input drum uses their reinforcement ring and therefore cannot use the stock steel pistons.
IIRC Sonnax supplies a custom overrun piston and recommends either a old-style aluminum forward piston or their (expensive) billet forward piston.
Instead I used a custom billet overrun piston (available from FinishLine Transmissions) with a stock steel forward piston.
I never measured the forward/overrun clearance - it seemed to move plenty when I air tested it.
The Sonnax SmarTtech input drum uses their reinforcement ring and therefore cannot use the stock steel pistons.
IIRC Sonnax supplies a custom overrun piston and recommends either a old-style aluminum forward piston or their (expensive) billet forward piston.
Instead I used a custom billet overrun piston (available from FinishLine Transmissions) with a stock steel forward piston.
I never measured the forward/overrun clearance - it seemed to move plenty when I air tested it.
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